Vertical powder grading mechanism with multiple grading units and grading device

Abstract

The utility model relates to a vertical powder grading mechanism with multiple grading units and a grading device, which comprise a grading barrel, more than two grading wheels are arranged in the grading barrel, each grading wheel is respectively in transmission connection with a corresponding driving motor positioned at the top of the grading barrel, an air outlet of each grading wheel is arranged downwards, and a fine powder discharge pipe is connected to the air outlet; a fine powder discharging port is formed in the top of the grading barrel, and the fine powder discharging pipes at the bottoms of the grading wheels are converged and connected to the fine powder discharging port. The grading wheel is placed in an inverted mode, no transmission shaft is arranged at the air outlet, the sectional area of a channel of the air outlet is large, the air passing amount is large, and therefore the powder grading efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of powder classification technology, specifically to a vertical powder classification mechanism and classification device with multiple classification units. Background Technology

[0002] Classifiers are crucial equipment for preparing ultrafine powders, producing powders with specific particle size distributions. With technological advancements, various industries are increasingly demanding finer and narrower particle size distributions for powders, thus placing higher performance requirements on classification equipment.

[0003] In the prior art, the air outlet channel of the vertical grading mechanism is reduced because the drive shaft needs to pass through the grading wheel, which affects the air volume at this point. This effect is even greater when the diameter of the grading wheel is small. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vertical powder grading mechanism and grading device with multiple grading units.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A vertical powder classification mechanism with multiple classification units includes a classification cylinder, inside which are provided two or more classification wheels. Each classification wheel is connected to a drive motor located at the top of the classification cylinder. The air outlet of each classification wheel is arranged downward, and a fine powder discharge pipe is connected to the air outlet. The top of the classification cylinder is provided with a fine powder discharge port, and the fine powder discharge pipes at the bottom of each classification wheel converge and connect to the fine powder discharge port.

[0007] Furthermore, a partition plate is provided inside the grading cylinder between two adjacent grading wheels, dividing the grading cylinder into two or more independent grading chambers.

[0008] Furthermore, a fine powder collection pipe is connected to the fine powder outlet, and the fine powder outlet pipes at the bottom of each classifier wheel are respectively connected to the fine powder collection pipe.

[0009] Furthermore, the fine powder outlet is located at the center of the classifying cylinder.

[0010] Furthermore, the fine powder discharge pipe has a bent pipe structure.

[0011] A vertical powder classification device, wherein the above-mentioned vertical powder classification mechanism.

[0012] The present invention adopts the above technical solution and has the following beneficial effects:

[0013] 1. Compared with conventional vertical grading structures, the grading wheel in this utility model is placed upside down, there is no drive shaft at the air outlet, the cross-sectional area of ​​the air outlet is larger, and the air volume is larger, so the grading efficiency of powder is more efficient.

[0014] 2. Inside the classifying cylinder, there is a partition plate between two adjacent classifying wheels, which divides the classifier cylinder into independent classifying chambers. The airflow generated by the rotation and agitation of each classifying wheel will not interfere with each other, resulting in higher powder classification efficiency. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a schematic diagram of the vertical powder classification mechanism of this utility model;

[0017] Figure 2 This is a top view of the vertical powder classification mechanism of this utility model;

[0018] Figure 3 This is a cross-sectional view of the vertical powder classification mechanism of this utility model;

[0019] Figure 4 This is a cross-sectional view of the vertical powder classification device of this utility model; Detailed Implementation

[0020] like Figure 1-4 As shown, this utility model discloses a vertical powder grading mechanism with multiple grading units, including a grading cylinder 1. The grading cylinder 1 contains two or more grading wheels 2, each of which is connected to a drive motor 3 located at the top of the grading cylinder 1. The drive motor 3 serves as the power supply mechanism for the grading wheels 2, driving them to rotate. The grading wheels 2 are used to screen the fineness of the powder. By controlling the rotation speed of the grading wheels 2 through the drive motor 3, powders of different fineness can be screened. The faster the rotation speed of the grading wheels 2, the finer the powder that can pass through them. Preferably, the drive motor 3 is a variable frequency motor, which is simple to adjust and energy-saving.

[0021] In this invention, each classifying wheel 2 is inverted, with its air outlet facing downwards, and a fine powder discharge pipe 4 connected to this air outlet. The top of the classifying cylinder 1 has a fine powder discharge port, and the fine powder discharge pipes 4 at the bottom of each classifying wheel 2 converge and connect to this port. The fine powder discharge port is located at the center of the classifying cylinder 1. A fine powder collecting pipe 5 is connected to the fine powder discharge port, and the fine powder discharge pipes 4 at the bottom of each classifying wheel 2 are respectively connected to the fine powder collecting pipe 5. The fine powder discharge pipe 4 is a bent pipe structure.

[0022] In a preferred embodiment, a partition plate 10 is provided inside the classifying cylinder 1 between two adjacent classifying wheels 2, dividing the classifying cylinder 1 into two or more independent classifying chambers. The classifying wheels 2 of multiple classifying units are located in different classifying chambers, allowing each classifying unit to operate completely independently. The airflow generated by the rotation and agitation of each classifying wheel 2 will not interfere with each other, resulting in higher powder classification efficiency. In this embodiment, there are three classifying units, and three independent classifying chambers are uniformly arranged circumferentially inside the classifying cylinder 1.

[0023] The vertical powder grading device of this utility model includes the above-mentioned vertical powder grading mechanism. A lower conical hopper 6 is connected to the bottom of the grading cylinder 1. The bottom of the lower conical hopper 6 has a coarse powder outlet 61. A feed pipe 7 is provided on the side wall of the lower conical hopper 6, and the upper end of the feed pipe 7 extends into the interior of the grading cylinder 1. An inner conical hopper 8 is provided on the upper inner side of the lower conical hopper 6. An annular air supply ring 9 is provided around the inner conical hopper 8. Multiple air supply holes are evenly distributed along the axial direction on the inner wall where the air supply ring 9 connects to the inner conical hopper 8.

[0024] Material flow description: The material enters the classifying cylinder 1 through the feed pipe 7 under negative or positive pressure. It is screened by the high-speed rotating classifying wheel 2. Powder particles that pass through the classifying wheel 2 are discharged from the fine powder outlet. Powder particles that do not pass through the classifying wheel 2 settle in the classifying cylinder 1. When they settle down to the air supply ring 9 along the inner cone hopper 8, they are lifted up again and enter the classifying wheel 2 area for screening. Powder particles that cannot be lifted fall into the lower cone hopper 6 and are discharged from the coarse powder outlet 61.

[0025] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A vertical powder classification mechanism with multiple classification units, comprising a classification cylinder, wherein two or more classification wheels are provided inside the classification cylinder, and each classification wheel is respectively connected to a drive motor located at the top of the classification cylinder, characterized in that: Each classifying wheel has its air outlet facing downwards, and a fine powder discharge pipe is connected to the air outlet; the top of the classifying cylinder is provided with a fine powder discharge port, and the fine powder discharge pipes at the bottom of each classifying wheel converge and connect to the fine powder discharge port.

2. The vertical powder classification mechanism with multiple classification units according to claim 1, characterized in that: The grading cylinder has a partition plate between two adjacent grading wheels inside, which divides the grading cylinder into two or more independent grading chambers.

3. The vertical powder classification mechanism with multiple classification units according to claim 1, characterized in that: A fine powder collection pipe is connected to the fine powder outlet, and the fine powder outlet pipes at the bottom of each classifier wheel are respectively connected to the fine powder collection pipe.

4. The vertical powder classification mechanism with multiple classification units according to claim 1, characterized in that: The fine powder outlet is located at the center of the grading cylinder.

5. A vertical powder classification mechanism with multiple classification units according to claim 1, characterized in that: The fine powder discharge pipe has a bent pipe structure.

6. A vertical powder classification device, characterized in that: Includes the vertical powder classification mechanism as described in any one of claims 1-5.

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