Jet mill

Abstract

The utility model relates to the technical field of jet mills, and discloses a jet mill, which comprises a bottom gas tank, a milling gas box and a Venturi feed pipe, the whole milling gas box is a circular box body, a milling surrounding ring is arranged in the milling gas box, and the Venturi feed pipe is arranged in the milling gas box. The crushing surrounding ring encloses the interior of the crushing gas box to form a circular crushing gas cavity, eight central gas inlet hole channels are evenly formed in the ring surface of the crushing surrounding ring, and an upper gas inlet hole channel and a lower gas inlet hole channel are formed in the upper portion and the lower portion of each central gas inlet hole channel correspondingly; eight high-pressure air injection assemblies for supplying air to each central air inlet hole channel, each upper air inlet hole channel and each lower air inlet hole channel are uniformly mounted around the crushing air box. The jet mill has remarkable advantages in multiple aspects. And in the aspect of the crushing effect, through the unique multi-direction air inlet duct design, the collision and friction of airflow are enhanced, and the crushing efficiency, quality and uniformity are improved.

Description

Technical Field

[0001] This utility model relates to the field of airflow pulverizer technology, specifically an airflow pulverizer. Background Technology

[0002] Air jet mills are a commonly used material pulverizing equipment, widely used in industries such as chemical, pharmaceutical, and materials. They pulverize materials into fine particles through the impact and friction of high-speed airflow.

[0003] However, existing airflow mills with only a central air inlet have some significant shortcomings. In traditional designs, the airflow only exits from the central inlet, creating a relatively uniform airflow environment. The limited number of intersections between the airflows from different channels results in insufficient collision and friction between the airflows. This leads to weak forces acting on the material during the milling process, resulting in unsatisfactory milling effects, difficulty in pulverizing materials to finer particle sizes, and poor uniformity of the milling. Furthermore, due to the limitations of the airflow, the milling efficiency is relatively low, failing to meet the production requirements of some processes with high material milling demands. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an airflow pulverizer to solve the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an airflow pulverizer, comprising a bottom air tank, a pulverizing air box, and a Venturi feed pipe. The pulverizing air box is configured as a circular box body. A pulverizing ring is installed inside the pulverizing air box, which encloses a circular pulverizing air chamber inside the pulverizing air box. Eight central air inlet channels are evenly opened on the surface of the pulverizing ring. Each central air inlet channel has an upper air inlet channel and a lower air inlet channel above and below it, respectively. Eight high-pressure jet components that supply air to each central air inlet channel, upper air inlet channel, and lower air inlet channel are evenly installed around the pulverizing air box.

[0008] The airflow from the eight central air inlets forms an annular airflow channel. The airflow from the eight upper air inlets is inclined downward toward the interior of the annular airflow channel, and the airflow from the eight lower air inlets is inclined upward toward the interior of the annular airflow channel.

[0009] Preferably, the high-pressure jet assembly specifically includes the following structure:

[0010] The first high-pressure jet nozzle, the second high-pressure jet nozzle, and the third high-pressure jet nozzle are correspondingly distributed inside the upper air intake channel, the central air intake channel, and the lower air intake channel;

[0011] A first high-pressure suction pump, a second high-pressure suction pump, and a third high-pressure suction pump are connected to the air inlet ends of the first high-pressure jet nozzle, the second high-pressure jet nozzle, and the third high-pressure jet nozzle, respectively.

[0012] The first air inlet pipe, the second air inlet pipe, and the third air inlet pipe are connected to the air inlet ends of the first high-pressure air pump, the second high-pressure air pump, and the third high-pressure air pump, respectively.

[0013] Preferably, the air inlet of each of the high-pressure jet components is connected to the interior of the bottom gas tank.

[0014] Preferably, the top of the pulverizing air chamber is sealed by a cover, and a sealing ring is provided on the upper end face of the pulverizing ring, with the top of the sealing ring pressed against the lower end face of the cover.

[0015] Preferably, a finished air extraction pipe is installed at the center of the cap.

[0016] Preferably, the Venturi feed pipe is externally inserted into the inside of the crushing ring and communicates with the inside of the crushing air chamber.

[0017] Compared with the prior art, the present invention provides an airflow pulverizer, which has the following beneficial effects:

[0018] Enhance collision and friction

[0019] In addition to the central air inlet channel, this airflow pulverizer also features upper and lower air inlets on its pulverizing ring. When gas is ejected from these channels, the airflow from the eight upper inlets slopes downwards towards the interior of the annular airflow channel formed by the central air inlet, while the airflow from the eight lower inlets slopes upwards towards the interior of the same annular airflow channel. This multi-directional airflow convergence method significantly increases the number of intersections between the ejected gases from each channel compared to traditional airflow pulverizers with only a central air inlet, thereby generating even stronger collisions and friction.

[0020] Under intense collision and friction, materials can be crushed more effectively, improving crushing efficiency and quality, and enabling materials to be crushed finer to meet production demands with higher requirements for material particle size.

[0021] Improve the uniformity of grinding

[0022] Due to the complex airflow environment created by the multi-directional air inlet channels, the material experiences a more uniform force within the pulverizing chamber. Traditional airflow pulverizers with only a central air inlet may suffer from uneven airflow intensity in certain areas, leading to uneven material pulverization. However, the design of this pulverizer ensures that all parts of the material are fully subjected to strong airflow during the pulverization process, thereby improving the uniformity of pulverization. This benefits subsequent production processes, such as chemical raw material mixing, where high material uniformity is required, by providing a better raw material base.

[0023] In summary, this air jet mill possesses significant advantages in several aspects. Regarding pulverization performance, its unique multi-directional air inlet channel design enhances airflow collision and friction, improving pulverization efficiency, quality, and uniformity. This allows it to adapt to a wider range of material pulverization needs, particularly offering superior processing capabilities for materials that are difficult to pulverize or require high particle size and uniformity. These combined benefits make this air jet mill highly competitive in the field of air jet pulverization and it is expected to find widespread application in numerous industries such as chemical, pharmaceutical, and materials science, making significant contributions to improving production efficiency, reducing production costs, and enhancing product quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the split structure of this utility model;

[0026] Figure 3 This is a schematic diagram showing the distribution of the central air inlet channel, upper air inlet channel, lower air inlet channel, and sealing ring of this utility model.

[0027] Figure 4 This is a schematic diagram of the high-pressure jet assembly of this utility model;

[0028] Figure 5 This is a schematic diagram of the jet path of this utility model.

[0029] The components include: 1. Bottom air tank; 2. Crushing air box; 3. Crushing ring; 4. Venturi feed pipe; 5. High-pressure jet assembly; 6. Cover; 7. Finished product extraction pipe.

[0030] 31. Central air intake channel; 32. Upper air intake channel; 33. Lower air intake channel; 34. Sealing ring;

[0031] 51. First air intake duct; 52. Second air intake duct; 53. Third air intake duct; 54. First high-pressure air pump; 55. Second high-pressure air pump; 56. Third high-pressure air pump; 57. First high-pressure jet nozzle; 58. Second high-pressure jet nozzle; 59. Third high-pressure jet nozzle. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0033] It should be noted that if the utility model embodiment involves directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

[0035] Please see Figure 1-5 An airflow pulverizer mainly consists of a bottom air tank 1, a pulverizing air box 2, and a Venturi feed pipe 4.

[0036] The pulverizing air chamber 2 is designed as a circular box, with a pulverizing ring 3 installed inside. This pulverizing ring 3 encloses a circular pulverizing air chamber within the pulverizing air chamber 2. Eight central air inlet channels 31 are evenly distributed on the surface of the pulverizing ring 3. Above and below each central air inlet channel 31, there are also upper air inlet channels 32 and lower air inlet channels 33, respectively. Unlike traditional airflow pulverizers that only have central air inlets, this design further enhances the pulverizing effect. When gas is ejected from the eight central air inlet channels 31, it forms an annular airflow channel. Simultaneously, the airflow ejected from the eight upper air inlet channels 32 is inclined downwards towards the interior of this annular airflow channel, and the airflow ejected from the eight lower air inlet channels 33 is inclined upwards towards the interior of this annular airflow channel. This increases the number of intersections of the gas ejected from each channel, resulting in a stronger collision and friction effect compared to traditional airflow pulverizers with only central air inlets, thus enhancing the pulverizing effect on the material.

[0037] Eight high-pressure jet assemblies 5 are evenly installed around the pulverizing air chamber 2 to supply air to each central air inlet 31, upper air inlet 32, and lower air inlet 33. The specific structure of the high-pressure jet assembly 5 includes: a first high-pressure jet nozzle 57, a second high-pressure jet nozzle 58, and a third high-pressure jet nozzle 59 correspondingly distributed inside the upper air inlet 32, the central air inlet 31, and the lower air inlet 33; a first high-pressure suction pump 54, a second high-pressure suction pump 55, and a third high-pressure suction pump 56 connected to the air inlet ends of the first high-pressure suction pump 57, the second high-pressure jet nozzle 58, and the third high-pressure jet nozzle 59; and a first air inlet duct 51, a second air inlet duct 52, and a third air inlet duct 53 connected to the air inlet ends of the first high-pressure suction pump 54, the second high-pressure suction pump 55, and the third high-pressure suction pump 56.

[0038] Each high-pressure jet assembly 5 has its air inlet connected to the inside of the bottom air tank 1, thereby ensuring a stable air supply.

[0039] The top of the crushing air chamber 2 is sealed by a cover 6 to ensure that the crushing process takes place in a relatively enclosed environment, improving crushing efficiency and quality. A sealing ring 34 is provided on the upper end face of the crushing ring 3, and the top of the sealing ring 34 is pressed tightly against the lower end face of the cover 6, enhancing the sealing performance of the crushing air chamber 2. A finished product extraction pipe 7 is installed in the center of the cover 6 for extracting the crushed finished material.

[0040] The Venturi feed pipe 4 is inserted into the crushing ring 3 from the outside and is connected to the inside of the crushing air chamber so that the material to be crushed can be sent into the crushing air chamber for crushing.

[0041] The material grinding process of this air jet mill is as follows:

[0042] The bottom gas tank 1 serves as a gas source storage device, providing gas for the entire pulverizing process. The gas enters the first high-pressure suction pump 54, the second high-pressure suction pump 55, and the third high-pressure suction pump 56 through the first air inlet pipe 51, the second air inlet pipe 52, and the third air inlet pipe 53, respectively.

[0043] In the eight high-pressure jet assembly 5, the first high-pressure suction pump 54 pressurizes the gas and then jets it through the first high-pressure jet nozzle 57 upward air inlet 32; the second high-pressure suction pump 55 pressurizes the gas and then jets it through the second high-pressure jet nozzle 58 into the central air inlet 31; the third high-pressure suction pump 56 pressurizes the gas and then jets it through the third high-pressure jet nozzle 59 downward air inlet 33.

[0044] When the gas is ejected from the eight central air inlets 31 of the crushing ring 3, an annular airflow channel is formed in the crushing air chamber inside the crushing air box 2.

[0045] Simultaneously, the airflow ejected from the eight upper air inlet channels 32 is inclined downwards towards the interior of the annular airflow channel, while the airflow ejected from the eight lower air inlet channels 33 is inclined upwards towards the interior of the annular airflow channel. The gases ejected from each channel intersect, generating strong collisions and friction, creating an airflow environment suitable for pulverizing materials.

[0046] The material to be crushed is attracted by negative pressure and drawn into the crushing air chamber inside the crushing ring 3.

[0047] The material entering the pulverizing chamber is pulverized under the intense collision and friction of the airflow. Due to the unique air inlet design of this pulverizer, compared with traditional airflow pulverizers with only a central air inlet, it can generate stronger collision and friction, thereby enhancing the pulverization effect on the material.

[0048] The crushed finished material is extracted by the finished product extraction pipe 7 in the center of the top cover 6 of the crushing air box 2, thus completing the entire material crushing process.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An airflow pulverizer, comprising a bottom air tank (1), a pulverizing air chamber (2), and a Venturi feed pipe (4), characterized in that: The pulverizing air box (2) is configured as a circular box. A pulverizing ring (3) is installed inside the pulverizing air box (2). The pulverizing ring (3) encloses a circular pulverizing air chamber inside the pulverizing air box (2). Eight central air inlet channels (31) are evenly opened on the ring surface of the pulverizing ring (3). Each central air inlet channel (31) is provided with an upper air inlet channel (32) and a lower air inlet channel (33) above and below it, respectively. Eight high-pressure jet components (5) are evenly installed around the pulverizing air box (2) to supply air to each central air inlet channel (31), upper air inlet channel (32) and lower air inlet channel (33). The eight central air intakes (31) eject air to form an annular airflow channel. The airflow ejected from the eight upper air intakes (32) is inclined downward toward the interior of the annular airflow channel formed above. The airflow ejected from the eight lower air intakes (33) is inclined upward toward the interior of the annular airflow channel formed above.

2. The airflow pulverizer according to claim 1, characterized in that: The high-pressure jet assembly (5) specifically includes the following structure: The first high-pressure jet nozzle (57), the second high-pressure jet nozzle (58), and the third high-pressure jet nozzle (59) are correspondingly distributed inside the upper air intake channel (32), the central air intake channel (31), and the lower air intake channel (33). A first high-pressure suction pump (54), a second high-pressure suction pump (55), and a third high-pressure suction pump (56) are connected to the air inlet ends of the first high-pressure jet nozzle (57), the second high-pressure jet nozzle (58), and the third high-pressure jet nozzle (59). The first air inlet pipe (51), the second air inlet pipe (52), and the third air inlet pipe (53) are connected to the air inlet ends of the first high-pressure air pump (54), the second high-pressure air pump (55), and the third high-pressure air pump (56).

3. The airflow pulverizer according to claim 1, characterized in that: Each of the high-pressure jet assembly (5) has its air inlet end connected to the interior of the bottom gas tank (1).

4. The airflow pulverizer according to claim 1, characterized in that: The top of the pulverizing air box (2) is sealed by a cover (6), and a sealing ring (34) is provided on the upper end face of the pulverizing ring (3). The top of the sealing ring (34) is pressed against the lower end face of the cover (6).

5. The airflow pulverizer according to claim 4, characterized in that: A finished air extraction pipe (7) is installed at the center of the cap (6).

6. The airflow pulverizer according to claim 1, characterized in that: The Venturi feed pipe (4) is inserted into the inside of the crushing ring (3) from the outside and is connected to the inside of the crushing air chamber.

Images