Agricultural chemical wettable powder use grading impeller

Abstract

The utility model provides a kind of hierarchical impeller for agricultural chemical wettable powder, it is related to hierarchical impeller technical field, to solve the problem that existing hierarchical impeller when using, using straight blade or forward-inclined blade, turbulent flow is generated when airflow passes, leading to coarse particle is mixed into finished product by turbulent flow entrainment, airflow passage distortion, produces the problem of tail vortex disturbance flow, including top sheet;Top sheet outside is provided with flow guide ring;Top sheet is provided with blade;Blade is set on flow guide ring;Blade bottom is provided with bottom sheet;Bottom sheet bottom is provided with fairing.The backward-inclined blade can produce more gentle airflow field and more uniform centrifugal field, improve classification accuracy, reduce the entrainment of coarse particles, the setting forty-eight groups of blades can improve classification efficiency and classification accuracy, ensure enough classification area length, increase flow guide ring, fairing at impeller outlet, improve airflow distribution, reduce inlet turbulent flow and outlet backflow, make airflow more uniform, stably pass through classification zone, improve classification accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of classifying impeller technology, and more specifically, it relates to a classifying impeller for wettable powders in agricultural and chemical industries. Background Technology

[0002] A classifying impeller is a rotating mechanical device that uses a centrifugal force field to sort powder particles according to their size. In a high-speed airflow, the centrifugal force generated by the blades throws coarse particles to the periphery for collection, while fine particles are discharged with the center of the airflow, thereby achieving the target particle size distribution.

[0003] Based on existing technology, it has been found that existing staged impellers, using straight or forward-curved blades, generate severe turbulence when airflow passes through. This causes coarse particles to be entrained and mixed into the finished product due to turbulence, while fine particles agglomerate due to repeated collisions in the eddies. Furthermore, the blades are connected by round steel, and the welded / riveted joints between the round steel and the blades form rigid connection points. Under alternating loads during high-speed rotation, these points can cause weld cracking, leading to blade detachment and severe equipment damage. Wear / deformation of a single blade can disrupt the overall balance, distort the airflow channel, generate wake vortex turbulence, and disrupt laminar flow. A T-shaped dead angle is formed at the junction of the round steel and the blade, making it difficult to remove pesticide powder once embedded. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a classifying impeller for wettable powders in agricultural chemicals. This solves the problem that existing classifying impellers, using straight or forward-curved blades, generate severe turbulence during airflow. This causes coarse particles to be entrained and mixed into the finished product, while fine particles agglomerate due to repeated collisions in the eddies. Furthermore, the blades are connected by round steel, and the welded / riveted joints between the round steel and the blades form rigid connection points. During high-speed rotation, these points are subjected to alternating loads, leading to weld cracking and blade detachment, causing severe equipment damage. Wear / deformation of a single blade disrupts the overall balance, distorts the airflow channel, generates wake vortex turbulence, and disrupts laminar flow. Additionally, the T-shaped dead angle formed at the junction of the round steel and the blade makes it difficult to remove embedded pesticide powder.

[0005] This utility model relates to a classifying impeller for wettable powders in agricultural chemicals, achieved through the following specific technical means:

[0006] A classifying impeller for wettable powders in agricultural chemicals, including top plates;

[0007] A guide ring is provided on the outside of the top plate; blades are provided on the top plate; the blades are provided on the guide ring; a base plate is provided at the bottom of the blades; a main shaft is provided at the center of the top of the base plate; the main shaft passes through the center of the top plate; a shunting cover is provided at the bottom of the base plate; the top plate, blades and base plate form a staged impeller.

[0008] Furthermore, the top plate has a rectangular notch; the top plate has a circular hole at its center; and the rectangular notch of the top plate is connected to the blade by welding.

[0009] Furthermore, the guide ring is provided with a rectangular notch, and the interior of the rectangular notch is connected to the blade by welding.

[0010] Furthermore, the blades are arranged in a backward-sloping manner; there are a total of forty-eight groups of blades; the blades are arranged in graded zones; the blades are evenly arranged around the top plate; the number of blades corresponds to the number of rectangular notches on the bottom and top plates.

[0011] Furthermore, the substrate has a rectangular notch; blades are welded onto the rectangular notch of the substrate; and the main shaft is externally connected to a motor.

[0012] Furthermore, the fairing is internally configured as a conical structure; the height of the fairing is flush with the height of the blades; and the fairing contains a top plate, blades, and a bottom plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This device includes a guide ring and a shunting shield. The guide ring is located outside the top plate, while the shunting shield is located at the bottom of the bottom plate. The blades are backward-curved. Compared to straight or forward-curved blades, backward-curved blades generate a smoother airflow and a more uniform centrifugal force field, improving classification accuracy, reducing the entrainment of coarse particles, and lowering energy consumption. Optimizing the blade installation angle (tilt angle) and twist angle makes the airflow between the blades smoother, reducing eddies and turbulence, thereby improving classification efficiency (sharper particle size cutting). The forty-eight sets of blades enhance classification efficiency and accuracy. To increase the classification zone and refine the centrifugal force field, ensuring sufficient classification zone length so that particles have ample time to be classified, a guide ring and a shunting shroud are added at the impeller outlet to improve airflow distribution, reduce inlet turbulence and outlet backflow, and allow the airflow to pass through the classification zone more evenly and stably, thereby improving classification accuracy. This ensures that the airflow entering the classification zone is in a uniform and stable laminar flow state, avoiding the decrease in classification accuracy caused by local turbulence. By inserting and welding rectangular notches between the impeller and the blades, the classification impeller operates more stably, the airflow channel is smoother, and it is easier to clean, making it more practical for applications involving wettable powders in agricultural and chemical industries. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the graded impeller of this utility model.

[0017] Figure 3 This utility model is composed of Figure 3 A schematic diagram of the enlarged portion of section A.

[0018] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0019] 1. Top plate; 2. Guide ring; 3. Blade; 4. Bottom plate; 5. Main shaft; 6. Fairing. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0021] Example:

[0022] As attached Figure 1 To be continued Figure 3 As shown:

[0023] This utility model provides a classifying impeller for wettable powders in agricultural chemicals, including a top plate 1;

[0024] A guide ring 2 is provided on the outside of the top plate 1; blades 3 are provided on the top plate 1; blades 3 are provided on the guide ring 2; a base plate 4 is provided at the bottom of the blades 3; a main shaft 5 is provided at the center of the top of the base plate 4; the main shaft 5 passes through the center of the top plate 1; a shunting cover 6 is provided at the bottom of the base plate 4; the top plate 1, blades 3 and base plate 4 form a classifying impeller; by inserting and welding the top plate 1 and base plate 4 with the blades 3 through the rectangular notches, the classifying impeller runs more stably, the airflow channel is smoother, and it is easier to clean; the guide ring 2 and the shunting cover 6 improve the airflow distribution, reduce inlet turbulence and outlet backflow, make the airflow pass through the classifying zone more uniformly and stably, improve the classification accuracy, and ensure that the airflow entering the classifying zone is in a uniform and stable laminar flow state.

[0025] Among them, such as Figure 2 As shown, a rectangular notch is provided on the top plate 1; there is a round hole at the center of the top plate 1; the rectangular notch of the top plate 1 is connected to the blade 3 by welding.

[0026] Among them, such as Figure 2 As shown, the guide ring 2 has a rectangular notch, and the inside of the rectangular notch of the guide ring 2 is connected to the blade 3 by welding.

[0027] Among them, such as Figure 2As shown, blades 3 are arranged in a backward-sloping configuration; there are forty-eight sets of blades 3; the blades 3 are arranged in a classification zone; the blades 3 are evenly arranged around the top plate 1; the number of blades 3 corresponds to the number of rectangular notches on the bottom plate 4 and the top plate 1; the backward-sloping blades 3, compared to straight blades or forward-sloping blades, can generate a smoother airflow field and a more uniform centrifugal force field, improve classification accuracy, reduce the entrainment of coarse particles, and reduce energy consumption. The optimized installation angle (tilt angle) and twist angle of the blades 3 make the airflow between the blades 3 smoother, reduce eddies and turbulence, thereby improving classification efficiency (sharper particle size cutting); the forty-eight sets of blades 3 can improve classification efficiency and classification accuracy because they increase the classification area and refine the centrifugal force field, ensuring sufficient classification area length so that particles have enough time to be classified.

[0028] Among them, such as Figure 3 As shown, a rectangular notch is provided on the substrate 4; blades 3 are welded onto the rectangular notch of the substrate 4; a motor is externally connected to the main shaft 5; through the external motor of the main shaft 5, a higher rotational speed generates a greater centrifugal force, which can separate finer particles (smaller cutting particle size). Conversely, reducing the rotational speed allows slightly coarser particles to pass through. Precise and wide-range rotational speed control is the key to achieving the target particle size distribution.

[0029] Among them, such as Figure 1 As shown, the interior of the fairing 6 is a conical structure; the height of the fairing 6 is the same as the height of the blade 3; the interior of the fairing 6 is provided with a top plate 1, a blade 3 and a bottom plate 4.

[0030] The specific usage and function of this embodiment are as follows:

[0031] In this invention, when using this device, the material enters from inside the top plate 1, and the main shaft 5 is driven to rotate at high speed by an external motor, generating greater centrifugal force, which can separate finer particles. The forty-eight sets of blades 3 can improve the classification efficiency and classification accuracy. Because the classification area is increased and the centrifugal force field is refined, a sufficient classification area length is ensured, allowing the particles enough time to be classified. The backward-inclined blades 3 can generate a smoother airflow field and a more uniform centrifugal force field, improving classification accuracy and reducing the entrainment of coarse particles, allowing the material to be dispersed from the classification area between the blades 3. Furthermore, the flow guide ring 2 and the rectifier 6 can improve the airflow distribution, reduce inlet turbulence and outlet backflow, and make the airflow pass through the classification area more uniformly and stably, improving classification accuracy and ensuring that the airflow entering the classification area is in a uniform and stable laminar flow state.

Claims

1. A classifying impeller for wettable powders in agricultural chemicals, characterized in that: Including the top sheet (1); The top plate (1) is provided with a guide ring (2) on its outside; the top plate (1) is provided with a blade (3); the blade (3) is provided on the guide ring (2); the bottom plate (4) is provided at the bottom of the blade (3); the main shaft (5) is provided at the center of the top of the bottom plate (4); the main shaft (5) passes through the center of the top plate (1); the bottom plate (4) is provided with a shroud (6); the top plate (1), the blade (3) and the bottom plate (4) form a graded impeller.

2. The classifying impeller for wettable powders in agricultural chemicals according to claim 1, characterized in that: The top plate (1) has a rectangular notch; the top plate (1) has a circular hole at its center; the rectangular notch of the top plate (1) is connected to the blade (3) by welding.

3. A classifying impeller for wettable powders in agricultural chemicals according to claim 1, characterized in that: The guide ring (2) has a rectangular notch, and the inside of the rectangular notch of the guide ring (2) is connected to the blade (3) by welding.

4. A classifying impeller for wettable powders in agricultural chemicals according to claim 1, characterized in that: The blades (3) are arranged in a backward tilting manner; there are forty-eight sets of blades (3); the blades (3) are arranged in a graded manner; the blades (3) are evenly arranged around the top plate (1); the number of blades (3) corresponds to the number of rectangular notches on the bottom plate (4) and the top plate (1).

5. A classifying impeller for wettable powders in agricultural chemicals according to claim 1, characterized in that: The substrate (4) has a rectangular notch; a blade (3) is welded onto the rectangular notch of the substrate (4); and the main shaft (5) is connected to an external motor.

6. A classifying impeller for wettable powders in agricultural chemicals according to claim 1, characterized in that: The fairing (6) has a conical structure inside; the height of the fairing (6) is the same as the height of the blade (3); the fairing (6) has a top plate (1), a blade (3) and a bottom plate (4) inside.

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