Compound fertilizer mixing device for compound fertilizer production
By designing a multi-stage mixing structure and a bevel gear transmission assembly, the problems of long mixing time and uneven mixing caused by a single mixing component are solved, thus achieving efficient production and uniform mixing of compound fertilizers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA TONGGUDA BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-24
AI Technical Summary
Existing fertilizer mixing devices for solid compound fertilizer production only have a single stirring element, which makes it difficult to fully mix agglomerated raw materials, resulting in low production efficiency and uneven mixing.
The multi-stage stirring structure includes a first stirring shaft and a second stirring shaft connected by a bevel gear transmission assembly. Combined with an auger, stirring rods, and cross-shaped vertical bars, it achieves multi-stage stirring and dispersing, ensuring that the raw materials are fully mixed.
It shortens the mixing time, improves mixing efficiency and uniformity, and enhances the production efficiency and quality of compound fertilizers.
Smart Images
Figure CN224541575U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fertilizer production technology, specifically to a fertilizer mixing device for compound fertilizer production. Background Technology
[0002] Compound fertilizer refers to a multi-element compound fertilizer containing two or more of the three nutrient elements: nitrogen, potassium, and phosphorus. Its function is to meet the comprehensive and balanced needs of agriculture under different production conditions for various nutrients. Traditional physical mixing processes usually use mixing equipment to mix and stir the raw materials of single nutrients together to produce compound fertilizer.
[0003] Most existing fertilizer mixing devices for solid compound fertilizer production only have one agitator. During use, various raw material granules or powders are directly poured into the mixing tank from the feed inlet at the top of the device. The mixture is then stirred and mixed by this single agitator inside the tank. After stirring, the mixed material is discharged from the discharge outlet at the bottom of the device. However, fertilizer raw materials are prone to clumping during storage. Using a single agitator to thoroughly stir and break up the clumped raw materials is time-consuming, resulting in low production efficiency of compound fertilizer. On the other hand, shortening the stirring time may result in insufficient breaking up of the clumped raw materials, leading to uneven fertilizer mixing and affecting the effectiveness of the compound fertilizer. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a fertilizer mixing device for compound fertilizer production, so as to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] This utility model provides a fertilizer mixing device for compound fertilizer production, including a mixing tank, a first mixing shaft, a second mixing shaft, a bevel gear transmission assembly, and a motor; the top flange of the mixing tank is connected to a sealing cover; several feed funnels are arranged in a circular array on the top of the sealing cover; the bottom of the feed funnels is fitted with a second mixing shaft through a bearing seat, which is a primary mixing component; the motor shaft of the motor is connected to the first mixing shaft through a coupling, and the other end of the first mixing shaft extends from top to bottom through the sealing cover into the mixing tank; the first mixing shaft and the second mixing shaft are connected by a bevel gear transmission assembly;
[0007] A mounting plate is bolted between several of the feeding hoppers; the motor is bolted to the center of the mounting plate, and the motor shaft passes through the mounting plate from top to bottom.
[0008] Preferably, the bevel gear transmission assembly includes a driving bevel gear and a driven bevel gear, which mesh with each other; the driving bevel gear is sleeved on the upper part of the first stirring shaft, and the driving bevel gear is located between the sealing cover and the mounting plate, with the driving bevel gear close to the upper surface of the sealing cover.
[0009] Preferably, the bottom outer wall of the feed funnel is symmetrically fitted with bearing seats on both opposite sides by bolts, namely bearing seat I and right bearing seat II; one end of the second stirring shaft passes through the feed funnel from the inside to the outside and is bolted to bearing seat I, and the other end of the second stirring shaft passes through the feed funnel and right bearing seat II from the inside to the outside in sequence and is bolted to the driven bevel gear.
[0010] Preferably, a connector is integrally formed on the middle part and near the bottom of the outer wall of the feeding funnel, and the mounting plate is placed on the connector; the bottom end of the feeding funnel passes through the sealing cover from top to bottom to facilitate feeding; an annular connector is integrally formed on the outer wall of the bottom of the feeding funnel near the tail end, and the annular connector is set on the sealing cover by bolts to facilitate disassembly, cleaning and storage; the bottom surface of the annular connector is provided with a sealing strip to ensure that the bottom of the feeding funnel is tightly connected to the sealing cover.
[0011] Preferably, the first stirring shaft is bolted with an auger, a first stirring rod, a second stirring rod, and a third stirring rod in sequence from bottom to top; the third stirring rod is close to the bottom surface of the sealing cover; the first stirring rod is close to the bottom end of the stirring shaft, and the first stirring rod is formed by welding four upper stirring rods and four lower stirring rods together with a mounting ring, which is used to cooperate with the inverted triangular body in the lower part of the mixing tank, so as to further stir and mix the mixture gathered in this area and ensure uniform mixing; the auger is set at the bottom end of the stirring shaft, and the bottom of the auger is close to the bottom surface of the bottom discharge port in the mixing tank, which is used to discharge the mixture in the tank.
[0012] Preferably, the second and third stirring rods are identical in shape and size, each consisting of four stirring rods evenly distributed on a ring and welded together; the length of the stirring rod in the second stirring rod is slightly smaller than the radius of the mixing tank; the length of the upper stirring rod is shorter than the length of the stirring rod but longer than the length of the lower stirring rod; the diameter of the auger is slightly smaller than the inner diameter of the discharge port in the mixing tank, so that the auger can rotate and drive the mixture to fall.
[0013] Preferably, the stirring rods in the second stirring rod are each bolted with a cross-shaped vertical strip corresponding to the stirring rods in the third stirring rod, and the stirring rods in the second stirring rod are each bolted with a cross-shaped vertical strip corresponding to the stirring rods in the upper stirring rod, which is used to stir and disperse the area between the first stirring rod and the second stirring rod, and the area between the second stirring rod and the third stirring rod, to ensure that the raw materials are mixed evenly, and to further break up and disperse the clumps of raw materials gathered in the area using the edges of the cross-shaped vertical strips.
[0014] Preferably, the second stirring shaft has strip-shaped mesh blades evenly distributed, and the other end of the strip-shaped mesh blades has protrusions evenly distributed, which are used to screen the raw materials and to coarsely break up the clumps for the first time.
[0015] Preferably, the mixing tank is placed on a workbench, and the bottom of the support base in the mixing tank is bolted to the workbench; the discharge port at the bottom of the mixing tank extends downward to the bottom of the panel in the workbench; the lower surface of the panel is hinged to the cover at the bottom of the discharge port through an electric door opening and closing controller, for easy opening / closing of the discharge port; the electric door opening and closing controller and the motor are both electrically connected to the control switch on the workbench.
[0016] The beneficial effects of this utility model are as follows: The fertilizer mixing device for compound fertilizer production in this utility model has a multi-stage stirring function. By setting a first stirring structure and coordinating with a second stirring structure through a bevel gear transmission component, each raw material is stirred and dispersed twice. The raw materials are then mixed in the mixing tank by different stirring components. The multi-stage stirring structure works in concert, reducing the stirring time and ensuring thorough stirring, dispersing and mixing of the raw materials (including lumps). This effectively solves the problems of long stirring time and uneven fertilizer mixing in existing solid fertilizer mixing devices with a single stirring shaft, improves stirring efficiency, ensures thorough dispersion and uniform mixing of the fertilizer, and enhances the effect of compound fertilizer. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A partial structural cross-sectional view of a fertilizer mixing device for compound fertilizer production provided in this embodiment of the present utility model;
[0019] Figure 2 A structural front view of a fertilizer mixing device for compound fertilizer production provided in an embodiment of this utility model;
[0020] Figure 3 for Figure 2 Top view;
[0021] Figure 4 for Figure 3 A diagram showing the installation after removing the mounting plate;
[0022] Figure 5 This is a schematic diagram of the second stirring rod;
[0023] Figure 6 This is a schematic diagram of the third stirring rod.
[0024] Explanation of reference numerals in the attached drawings: 1. Mixing tank; 2. First mixing shaft; 3. Second mixing shaft; 4. Bevel gear transmission assembly; 5. Motor; 6. Sealing cover; 7. Feed funnel; 8. Bearing seat; 9. Mounting plate; 10. Sealing strip; 11. Cloth strip mesh blade; 12. Workbench; 13. Electric door opening and closing controller; 14. Cover plug; 15. Control switch;
[0025] 201. Screwdriver; 202. First stirring rod; 203. Second stirring rod; 204. Third stirring rod; 205. Cross-shaped vertical bar;
[0026] 401. Driving bevel gear; 402. Driven bevel gear;
[0027] 701. Connector; 702. Annular connector. Detailed Implementation
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0029] Example 1, such as Figures 1 to 6As shown, a fertilizer mixing device for compound fertilizer production includes a mixing tank 1, a first mixing shaft 2, a second mixing shaft 3, a bevel gear transmission assembly 4, and a motor 5. A sealing cover 6 is connected to the top flange of the mixing tank 1. Several feeding funnels 7 are arranged in a circular array on the top of the sealing cover 6. The second mixing shaft 3 is housed in the bottom of each feeding funnel 7 via a bearing seat 8. The motor shaft of the motor 5 is connected to the first mixing shaft 2 via a coupling, and the other end of the first mixing shaft 2 extends from top to bottom through the sealing cover 6 into the mixing tank 1. The first mixing shaft 2 and the second mixing shaft 3 are connected by the bevel gear transmission assembly 4. Mounting plates 9 are bolted between the feeding funnels 7. The motor 5 is bolted to the center of the mounting plate 9, and the motor shaft of the motor 5 passes from top to bottom through the mounting plate 9.
[0030] In this process, the second stirring shaft 3 (including the strip-shaped mesh blade structure on it) is the primary stirring component, and the first stirring shaft 2 (including the auger, first stirring rod, second stirring rod, third stirring rod, and cross-shaped vertical bar on it) is the secondary stirring component. When the motor 5 starts, the motor shaft rotates, causing the first stirring shaft 2 to rotate. At the same time, the active conical wheel 401 on the first stirring shaft 2 rotates with the first stirring shaft 2. Using the gear meshing transmission principle, the active conical wheel 401 drives the driven conical tooth 402 to rotate, thereby driving the second stirring shaft 3 to rotate. At this time, the primary stirring components in each feed hopper 7 perform preliminary stirring and dispersing on the corresponding raw materials, and the secondary stirring components perform fine stirring and dispersing (secondary stirring and dispersing) on the coarsely dispersed (preliminary stirring and dispersing) mixture collected in the mixing tank 1. This ensures that the raw materials are fully dispersed, which can guarantee that the fertilizer is mixed evenly. Furthermore, the primary and secondary stirring components cooperate with each other, shortening the stirring time and improving the production efficiency of compound fertilizer.
[0031] In addition, it should be noted that the number of feed funnels 7 in this embodiment is set to 3. However, in other embodiments, the number of feed funnels 7 can be adjusted according to actual needs. This embodiment will not elaborate on this further.
[0032] Furthermore, such as Figure 1 , Figure 2 and Figure 4 As shown, the bevel gear transmission assembly 4 includes a driving bevel gear 401 and a driven bevel gear 402, which mesh with each other; the driving bevel gear 401 is sleeved on the upper part of the first stirring shaft 2, and the driving bevel gear 401 is located between the sealing cover 6 and the mounting plate 9, with the driving bevel gear 401 close to the upper surface of the sealing cover 6.
[0033] Furthermore, such as Figure 1 and Figure 2As shown, on either side of the bottom outer wall of the feed hopper 7, bearing seats 8 are symmetrically installed by bolts, namely bearing seat I and right bearing seat II; one end of the second stirring shaft 3 passes through the feed hopper 7 from the inside to the outside and is bolted to bearing seat I, and the other end of the second stirring shaft 3 passes through the feed hopper 7 and right bearing seat II from the inside to the outside and is bolted to driven bevel gear 402.
[0034] As a preferred option, such as Figure 1 and Figure 2 , Figure 4 As shown, a connector 701 is integrally welded to the middle and near the bottom of the outer wall of the feeding funnel 7, and the mounting plate 9 is placed on the connector 701; the bottom end of the feeding funnel 7 passes through the sealing cover 6 from top to bottom to facilitate feeding; an annular connector 702 is integrally welded to the outer wall of the bottom of the feeding funnel 7 near the tail end, and the annular connector 702 is bolted to the sealing cover 6 to facilitate disassembly, cleaning, and storage; a sealing strip 10 is adhered to the bottom surface of the annular connector 702 to ensure a tight connection between the bottom of the feeding funnel and the sealing cover.
[0035] Furthermore, such as Figure 1 As shown, from bottom to top, the first stirring shaft 2 is bolted with an auger 201, a first stirring rod 202, a second stirring rod 203, and a third stirring rod 204; the third stirring rod 204 is near the bottom surface of the sealing cover 6; the first stirring rod 202 is near the bottom end of the stirring shaft 2; as shown... Figure 1 and Figure 6 As shown, the first stirring rod 202 is integrally formed by welding four upper stirring rods and four lower stirring rods together with a mounting ring. It is used to cooperate with the inverted triangular main body in the lower part of the mixing tank, so as to further stir and mix the materials gathered in this area, ensuring uniform mixing; as shown... Figure 1 As shown, the auger 201 is located at the bottom end of the stirring shaft 2, and the bottom of the auger 201 is close to the bottom surface of the bottom discharge port in the mixing tank 1, for exporting the mixed material in the tank.
[0036] As a preferred option, such as Figure 1 As shown, the second stirring rod 203 and the third stirring rod 204 are the same in shape and size, and are both formed by welding four stirring rods evenly distributed on a ring sleeve (structure as shown). Figure 5 (as shown); Figure 1 As shown, the length of the stirring rod in the second stirring rod 203 is slightly smaller than the radius of the stirring tank 1; as Figure 1 As shown, the length of the upper stirring rod is less than the length of the stirring rod, but greater than the length of the lower stirring rod; as Figure 1 As shown, the diameter of the auger 201 is slightly smaller than the inner diameter of the discharge port in the mixing tank 1, so that the auger can rotate and drive the mixture to fall.
[0037] As a preferred option, such as Figure 1 As shown, the stirring rods in the second stirring rod 203 are respectively connected to the stirring rods of the third stirring rod 204 by bolts and are respectively connected to the stirring rods of the third stirring rod 204 by bolts and are respectively connected to the stirring rods of the second stirring rod 203 by bolts and are respectively connected to the stirring rods of the third stirring rod. They are used to stir and disperse the area between the first stirring rod and the second stirring rod, and the area between the second stirring rod and the third stirring rod, to ensure that the raw materials are mixed evenly, and to further break up and disperse the clumps of raw materials gathered in the area by using the edges of the cross-shaped vertical bars.
[0038] It should be noted that in actual production, due to the significant differences in the physical properties (such as particle size, density, and viscosity) of different fertilizers, fertilizers with higher viscosity tend to adhere to the mixing tank wall, affecting the mixing effect. Therefore, considering this actual production situation, in other embodiments, scrapers can be bolted along the side ends of the first, second, and third mixing rods (with the other side of the scraper contacting the inner wall of the mixing tank) to improve the mixing effect. The specific setup will not be described in detail in this embodiment.
[0039] In addition, during installation, the ring sleeve in the auger 201 is fitted onto the first stirring shaft 2 and installed with bolts; the mounting ring sleeve in the first stirring rod 202 is installed onto the first stirring shaft 2 with bolts; the ring sleeves in the second stirring rod 203 and the ring sleeves in the third stirring rod 204 are also installed onto the first stirring shaft 2 with bolts; the transverse diameter of the cross-shaped vertical bar 205 is smaller than the length of the upper stirring rod to prevent the cross-shaped vertical bar 205 from colliding with the inner wall of the barrel and causing damage to the device.
[0040] Furthermore, such as Figure 1 As shown, the second stirring shaft 3 has evenly distributed strip-shaped mesh blades 11, one end of which is welded to the second stirring shaft 3; as Figure 1 and Figure 3 , Figure 4 As shown, the other end of the strip-shaped mesh blade 11 has protrusions evenly distributed, which are used to screen the raw materials and to coarsely break up the clumps for the first time.
[0041] Furthermore, such as Figure 1 and Figure 2As shown, the mixing tank 1 is placed on the workbench 12. The bottom of the support base in the mixing tank 1 (the support base consists of a base and several support rods, one end of which is welded to the mixing tank and the other end is welded to the base) is bolted to the workbench 12. The discharge port at the bottom of the mixing tank 1 extends downward to the bottom of the panel in the workbench 12. The lower surface of the panel is hinged to the cover plug 14 at the bottom of the discharge port through an electric door opening and closing controller 13, which is used to facilitate opening / closing the discharge port. The electric door opening and closing controller 13 and the motor 5 are both electrically connected to the control switch 15 on the workbench.
[0042] It should be noted that during installation, the cover plug 14 is connected to the discharge port via a hinge connector; the electric door switch controller 13 is mounted on the bottom surface of the panel with bolts; the connecting rod in the electric door switch controller 13 is hinged to the bottom surface of the cover plug 14; the motor 5 and the electric door switch controller 13 are respectively connected to the control switch 15 via DC power lines.
[0043] Working Principle: First, connect the control switch on the workbench to an external power source via the power cable. The operator presses the corresponding button on the control switch to start the motor (the motor selection is not limited to model Y90S-4, which has advantages such as high efficiency, energy saving, good performance, low noise, low vibration, high reliability, and convenient maintenance; the speed is generally 1400-1500 r / min). At this time, the motor shaft drives the first stirring shaft to rotate through the coupling. The active bevel gear on the first stirring shaft meshes with the driven bevel gear, driving the second stirring shaft to rotate. Next, the operator pours the various fertilizer raw materials into the corresponding feed funnels and then through the sealing cover... The feed hopper feeds the material into the mixing tank. At this point, the raw material is initially stirred and dispersed by the strip mesh blades on the rotating second stirring shaft before falling into the mixing tank. It is then further stirred and dispersed by the third stirring rod, second stirring rod, first stirring rod, cross-shaped vertical bar, and auger on the rotating first stirring shaft, thus achieving multi-stage mixing and blending, improving mixing efficiency, and ensuring that the fertilizer is fully and evenly mixed. After mixing is completed, the operator presses the corresponding button on the control switch on the workbench to control the electric door controller to rotate downwards, thereby opening the cover at the bottom of the discharge port, allowing the mixed fertilizer to be discharged from the discharge port into the collection container by the auger.
[0044] In addition, it should be noted that after the mixing device in this utility model is used up, it needs to be thoroughly cleaned in order to increase the service life of the device and reduce the frequency of maintenance / replacement of parts; when assembling this device, a matching sealing ring should be set at the connection between the sealing cap and the mixing tank to ensure sealing performance.
[0045] The compound fertilizer production mixing device of this utility model has a reasonable structural design. Through multi-stage stirring, it improves the stirring efficiency and enhances the mixing uniformity, solving the problems of low stirring efficiency and uneven fertilizer mixing in existing mixing devices, as detailed below:
[0046] (1) Improved mixing efficiency: This utility model is equipped with a two-stage mixing component, a first mixing shaft and a second mixing shaft. The second mixing shaft is set at the bottom of the feed funnel as a first-stage mixing component, which can initially mix the fertilizer raw materials before they enter the mixing tank, and initially break up the lumpy raw materials. After the raw materials enter the mixing tank, the auger, mixing rod and other components on the first mixing shaft further mix the raw materials. Compared with the traditional mixing device with a single mixing component, this two-stage mixing method greatly shortens the time for fully breaking up and mixing the lumpy raw materials, and effectively improves the production efficiency of compound fertilizer.
[0047] (2) Improve the uniformity of mixing: The first stirring shaft is equipped with stirring rods of different shapes and positions. The second and third stirring rods work together with the cross-shaped vertical bars to stir the fertilizer raw materials from different angles and positions, avoiding the existence of dead corners in the mixing. At the same time, the strip-shaped grid blades and protrusions evenly distributed on the second stirring shaft also increase the mixing effect of the raw materials during the initial mixing, so that the fertilizer raw materials can be fully mixed, effectively improving the uniformity of fertilizer mixing, and thus improving the quality and effect of compound fertilizer.
[0048] (3) Reasonable structural design: The feeding funnel and the mixing tank are connected by a reasonable connection structure (ring connector and sealing strip), which ensures the sealing of the device and prevents the raw materials from leaking during the mixing process; the plug of the discharge port at the bottom of the mixing tank is electrically connected to the control switch through an electric door controller to realize opening / closing, which facilitates the control of the discharge and improves the convenience and automation of operation; in addition, the setting of the bevel gear transmission assembly makes the transmission between the first mixing shaft and the second mixing shaft more stable and reliable, ensuring the smooth progress of the entire mixing process.
[0049] Obviously, the above-described embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. Thus, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, then this utility model also intends to include these modifications and variations.
Claims
1. A fertilizer blending device for compound fertilizer production, characterized in that: The system includes a mixing tank (1), a first stirring shaft (2), a second stirring shaft (3), a bevel gear transmission assembly (4), and a motor (5). The mixing tank (1) has a sealing cover (6) connected to its top flange. Several feed funnels (7) are arranged in a ring array on the top of the sealing cover (6). The second stirring shaft (3) is housed in the bottom of the feed funnels (7) through a bearing seat (8). The motor (5) shaft is connected to the first stirring shaft (2) through a coupling, and the other end of the first stirring shaft (2) extends from top to bottom through the sealing cover (6) into the mixing tank (1). The first stirring shaft (2) and the second stirring shaft (3) are connected by the bevel gear transmission assembly (4). A mounting plate (9) is bolted between several of the feed hoppers (7); the motor (5) is bolted to the center of the mounting plate (9), and the motor (5) shaft passes through the mounting plate (9) from top to bottom.
2. The fertilizer blending device for compound fertilizer production as described in claim 1, characterized in that: The bevel gear transmission assembly (4) includes an active bevel gear and a driven bevel gear (402), which mesh with each other; the active bevel gear is sleeved on the upper part of the first stirring shaft (2), and the active bevel gear is located between the sealing cover (6) and the mounting plate (9), and the active bevel gear is close to the upper surface of the sealing cover (6).
3. The fertilizer blending device for compound fertilizer production as described in claim 2, characterized in that: The bottom outer wall of the feed hopper (7) is symmetrically fitted with bearing seats (8) on both sides by bolts, namely bearing seat I and right bearing seat II; one end of the second stirring shaft (3) passes through the feed hopper (7) from the inside to the outside and is bolted to bearing seat I, and the other end of the second stirring shaft (3) passes through the feed hopper (7) and right bearing seat II from the inside to the outside and is bolted to driven bevel gear (402).
4. The fertilizer blending device for compound fertilizer production as described in claim 1, characterized in that: A connector (701) is integrally formed on the middle part of the outer wall of the feed funnel (7) and near the bottom. The mounting plate (9) is placed on the connector (701). The bottom end of the feed funnel (7) passes through the sealing cover (6) from top to bottom to facilitate feeding. An annular connector (702) is integrally formed on the outer wall of the bottom of the feed funnel (7) near the bottom end. The annular connector (702) is set on the sealing cover (6) by bolts. A sealing strip (10) is provided on the bottom surface of the annular connector (702).
5. The fertilizer blending device for compound fertilizer production as described in claim 1, characterized in that: The first stirring shaft (2) is bolted with an auger (201), a first stirring rod (202), a second stirring rod (203), and a third stirring rod (204) in sequence from bottom to top; the third stirring rod (204) is close to the bottom surface of the sealing cover (6); the first stirring rod (202) is close to the bottom end of the stirring shaft, and the first stirring rod (202) is formed by welding four upper stirring rods and four lower stirring rods together through a mounting ring, which is used to cooperate with the inverted triangular body in the lower part of the stirring tank (1); the auger (201) is set at the bottom end of the stirring shaft, and the bottom of the auger (201) is close to the bottom surface of the bottom discharge port in the stirring tank (1).
6. The fertilizer blending device for compound fertilizer production as described in claim 5, characterized in that: The second stirring rod (203) and the third stirring rod (204) are the same in shape and size, and are formed by welding four stirring rods evenly distributed on a ring sleeve. The length of the stirring rod in the second stirring rod (203) is slightly smaller than the radius of the mixing tank (1). The length of the upper stirring rod is smaller than the length of the stirring rod, but larger than the length of the lower stirring rod. The diameter of the auger (201) is slightly smaller than the inner diameter of the discharge port in the mixing tank (1).
7. The fertilizer blending device for compound fertilizer production as described in claim 5, characterized in that: The stirring rods in the second stirring rod (203) are respectively connected to the stirring rods of the third stirring rod (204) by bolts and are respectively connected to the stirring rods of the third stirring rod (204) by bolts and are respectively connected to the stirring rods of the second stirring rod (203) by bolts and are respectively connected to the stirring rods of the third stirring rod (204 ...
8. The fertilizer blending device for compound fertilizer production as described in claim 1, characterized in that: The second stirring shaft (3) is evenly distributed with strip-shaped mesh blades (11), and one end of each strip-shaped mesh blade has protrusions evenly distributed.
9. A fertilizer blending device for compound fertilizer production as described in claim 1, characterized in that: The mixing tank (1) is placed on the workbench (12), and the bottom of the support base in the mixing tank (1) is bolted to the workbench (12); the discharge port at the bottom of the mixing tank (1) extends downward to the bottom of the panel in the workbench (12); the lower surface of the panel is hinged to the cover plug (14) at the bottom of the discharge port through an electric door opening and closing controller (13); the electric door opening and closing controller (13) and the motor (5) are both electrically connected to the control switch (15) on the workbench (12).