A precursor powder densification processing device

Abstract

The utility model provides a kind of front body powder compaction processing device, comprising: bunker, top is equipped with sealing cover, bottom is equipped with conical shrinkage outlet, for accommodating front body powder;Spiral metering device, it is connected below the conical shrinkage outlet;Negative pressure unit, through vacuum pipeline communication to bunker top space, configuration is extracted to remove powder gap gas;Air pressure unit, comprising: backflushing, through bunker top;Constant pressure gas source, gas is supplied to backflushing;Diffusion cover, cover in backflushing outside, and form diffusion cavity between backflushing;Wherein, the sidewall of the diffusion cover is equipped with the through structure that communicates diffusion cavity and bunker inner cavity.It provides a kind of front body powder compaction processing device, solves the problem that the metering accuracy is deteriorated due to not enough compact between powder in conveying process.

Description

Technical Field

[0001] This utility model relates to the field of powder metering accessories, specifically to a precursor powder compaction device. Background Technology

[0002] With breakthroughs in energy storage technology in the lithium battery industry and the rapid rise of new energy vehicle companies both domestically and internationally, there is a significant demand gap for ternary cathode materials. As a key raw material for ternary materials, the performance of precursors directly affects product quality. This demand for precursor production capacity has spurred the development of a series of precursor equipment manufacturers, such as those producing new rotary kilns, ultrasonic vibrating screens, screw conveyors, and vibrating conveyors. Regarding conveying solutions, mainstream precursor equipment manufacturers primarily offer screw conveying and vibrating conveying. While screw conveying offers advantages such as long-distance transport and large conveying capacity, the insufficient compaction of powder during transport leads to decreased metering accuracy, necessitating further innovation. Summary of the Invention

[0003] The problem this invention aims to solve is to provide a precursor powder compaction processing device to address the issue of insufficient compaction between powder particles during the conveying process, which leads to decreased metering accuracy.

[0004] The technical solution adopted by this utility model to solve the above problems is: a precursor powder compaction treatment device, comprising: The hopper is equipped with a sealing cover at the top and a conical shrinkage outlet at the bottom for containing precursor powder. A screw meter is connected below the conical contraction outlet; The negative pressure unit is connected to the top space of the hopper via a vacuum pipe and is configured to remove gas between powder particles. The wind pressure unit includes: Backflush nozzle, penetrating the top of the silo; A constant pressure gas source supplies gas to the backflush port; A diffuser cover covers the outside of the backflush port, forming a diffuser cavity between the diffuser cover and the backflush port; The diffusion shroud has a through structure on its sidewall that connects the diffusion cavity to the inner cavity of the hopper.

[0005] The negative pressure unit, connected to the top space of the hopper via a vacuum pipe, effectively removes gas from the gaps between powder particles. This solves the problem of loose, insufficiently compacted powder caused by a large amount of gas in these gaps, thus laying the foundation for improved metering accuracy. The constant pressure gas source in the air pressure unit supplies gas to the backflush port. Combined with the diffusion cavity formed between the diffuser and the backflush port, and the through-hole structure on the side wall of the diffuser connecting the diffusion cavity to the inner cavity of the hopper, this creates a uniform diffusion of gas into the hopper, resulting in backflush compaction of the powder. This solves the problem of insufficient powder compaction within the hopper, improving powder density. The bottom of the hopper features a conical contraction outlet connected to a screw metering device. This guides the compacted powder smoothly and stably to the screw metering device for measurement, solving the problem of decreased metering accuracy due to unstable flowability of loose powder during transport, ensuring accurate metering.

[0006] Furthermore, the diffuser is an arched structure with an airflow blocking surface in its center, configured to guide the airflow from the backflush nozzle to the circumferential edge of the diffuser. The arched structure and the central airflow blocking surface of the diffuser effectively guide the airflow from the backflush nozzle to the circumferential edge of the diffuser, allowing the airflow to diffuse more evenly into the hopper. This prevents concentrated airflow from impacting the powder in a specific area, thus resolving the adverse effects of airflow impact on powder distribution and compaction. It ensures that the airflow acts gently and effectively on the powder, improving the uniformity of powder density.

[0007] Furthermore, the through-structure comprises multiple gradually expanding conical diffuser holes, with the diameter of the hole near the backflush port being smaller than the diameter of the hole near the inner cavity of the hopper. The through-structure is designed with multiple gradually expanding conical diffuser holes, and the diameter of the hole near the backflush port is smaller than the diameter of the hole near the inner cavity of the hopper, creating an effect that gradually diffuses and slows down the airflow as it passes through the diffuser holes.

[0008] Furthermore, the diffusion holes are evenly distributed circumferentially along the diffusion shroud. This even distribution ensures that the airflow acts uniformly on the powder within the hopper in the circumferential direction, preventing localized areas from having excessively strong or weak airflow. This solves the problem of inconsistent powder density caused by uneven airflow distribution, further improving the uniformity of powder compaction and overall compaction effect.

[0009] Furthermore, the air pressure unit also includes a pressure regulating valve connected between the constant pressure air source and the backflush port for regulating gas pressure. The air pressure unit's pressure regulating valve, connected between the constant pressure air source and the backflush port, allows for adjustment of gas pressure based on the characteristics and compaction requirements of different precursor powders. This solves the problem of poor compaction caused by a uniform air pressure failing to adapt to different types of powders. The air pressure can be flexibly adjusted to achieve precise compaction of various precursor powders, improving the applicability and processing effect of the device. Attached Figure Description

[0010] Figure 1 This is a side view of the present invention; Figure 2 This is an enlarged view of the hopper of this utility model.

[0011] Diagram: 1. Hopper; 1.1. Sealing cover; 1.2. Conical contraction outlet; 2. Screw meter; 3. Negative pressure unit; 3.1. Vacuum pipeline; 4. Air pressure unit; 4.1. Backflush port; 4.2. Constant pressure air source; 4.3. Diffuser; 4.3.1. Airflow blocking surface; 4.3.2. Diffuser hole; 4.4. Diffuser cavity; 4.5. Air pressure regulating valve. Detailed Implementation

[0012] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0013] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0014] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0015] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0016] Please see Figures 1 to 2 A precursor powder compaction processing device mainly consists of a hopper 1, a screw metering device 2, a negative pressure unit 3, and a pneumatic pressure unit 4. The hopper 1 has a sealing cover 1.1 at the top and a conical contraction outlet 1.2 at the bottom for storing precursor powder. The screw metering device 2 is installed below the conical contraction outlet 1.2 for quantitative powder delivery. The negative pressure unit 3 is connected to the top space of the hopper 1 via a vacuum pipe 3.1, effectively removing gas from the gaps between the powder particles. The air pressure unit 4 includes components such as a backflush port 4.1, a constant pressure air source 4.2, a diffuser 4.3, and a pressure regulating valve 4.5. The backflush port 4.1 penetrates the top of the silo 1. The constant pressure air source 4.2 is connected to the backflush port 4.1 through a pipe to supply gas to the backflush port 4.1. A pressure regulating valve 4.5 is installed between the constant pressure air source 4.2 and the backflush port 4.1 to flexibly adjust the gas pressure. The diffuser 4.3 covers the outside of the backflush port 4.1, forming a diffuser cavity 4.4 between them. The diffuser cavity 4.4 has an arched structure, and the airflow blocking surface 4.3.1 in the middle can guide the airflow blown out of the backflush port 4.1 to the circumferential edge of the diffuser 4.3. The sidewall of the diffuser 4.3 is provided with multiple through structures evenly distributed along the circumference. These through structures are gradually expanding conical diffuser holes 4.3.2. The diameter of the hole near the backflush port 4.1 is smaller than the diameter of the hole near the inner cavity of the hopper 1, which facilitates the uniform diffusion of gas into the inner cavity of the hopper 1. The working principle of this device is as follows: When processing precursor powder, the negative pressure unit 3 is first activated to evacuate the top space of the hopper 1 through the vacuum pipe 3.1. The pressure difference gradually extracts the gas from the gaps between powder particles, reducing the amount of residual air in the powder and initially compacting it. After evacuation, the air pressure unit 4 is activated, and the constant pressure gas source 4.2 outputs gas at a stable pressure. This gas is adjusted to a suitable pressure by the pressure regulating valve 4.5, and then enters the diffusion chamber 4.4 through the backflush port 4.1. Due to the airflow blocking surface 4.3.1 in the middle of the diffusion hood 4.3, the gas cannot directly impact the powder vertically downwards. Instead, it is guided to the circumferential edge of the diffusion hood 4.3 and then evenly diffused into the inner cavity of the hopper 1 through the gradually expanding conical diffusion holes 4.3.2 on the side wall. This pressurized gas flows within the hopper 1, further compressing the powder particles, causing them to approach each other and fill the gaps, thereby achieving the compaction of the precursor powder. The compacted powder falls from the conical shrinkage outlet 1.2 at the bottom of the hopper 1 into the screw meter 2, where it is precisely metered and fed to provide raw materials that meet the density requirements for subsequent production processes such as powder forming and sintering.

[0017] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A precursor powder compaction processing apparatus, characterized in that, include: The hopper (1) is equipped with a sealing cover plate (1.1) at the top and a conical shrinkage outlet (1.2) at the bottom for containing precursor powder; A screw meter (2) is connected below the conical contraction outlet (1.2); The negative pressure unit (3) is connected to the top space of the silo (1) through a vacuum pipe (3.1) and is configured to remove gas between powder particles; Wind pressure unit (4), including: Backflush port (4.1) penetrates the top of silo (1); A constant pressure gas source (4.2) supplies gas to the backflush port (4.1); A diffuser shroud (4.3) covers the outside of the backflush port (4.1), forming a diffuser cavity (4.4) between the diffuser shroud (4.1) and the backflush port (4.1); The diffusion shroud (4.3) has a through structure on its side wall that connects the diffusion cavity (4.4) and the inner cavity of the hopper (1).

2. The precursor powder compaction device according to claim 1, characterized in that: The diffuser (4.3) has an arched structure with an airflow blocking surface (4.3.1) in the middle, which is configured to guide the airflow from the backflush port (4.1) to the circumferential edge of the diffuser (4.3).

3. The precursor powder compaction apparatus according to claim 1 or 2, characterized in that: The through structure consists of multiple gradually expanding conical diffusion holes (4.3.2), the diameter of which is smaller at the end near the backflush port (4.1) than at the end near the inner cavity of the hopper (1).

4. The precursor powder compaction apparatus according to claim 3, characterized in that: The diffusion holes (4.3.2) are uniformly distributed circumferentially along the diffusion cover (4.3).

5. The precursor powder compaction device according to claim 1, characterized in that: The wind pressure unit (4) also includes: A pressure regulating valve (4.5) is connected between a constant pressure gas source (4.2) and a backflush port (4.1) to regulate gas pressure.

Images