Material pressure stabilizing feeding device for airflow mill

Abstract

This utility model discloses a material pressure stabilizing and supplying device for an air classifier mill, belonging to the field of material supply technology for air classifier mills. It includes a hollow classifying shell, a cover, and a bottom cover, with the cover, bottom cover, and hollow classifying shell forming a classifying cavity. A feed pipe is connected to the lower part of the outer wall of the hollow classifying shell, and a material sorting mechanism is provided on the upper part of the outer wall of the hollow classifying shell. A first air nozzle is located at the end of the feed pipe opposite to the hollow classifying shell, and the feed pipe has an inlet corresponding to the first air nozzle and communicating with the feed channel. Several second air nozzles, which can communicate with the classifying cavity and are staggered, are arranged radially on the bottom cover. A pressure monitoring unit for monitoring the air pressure inside the classifying cavity is provided on the cover and / or the hollow classifying shell and / or the bottom cover. This utility model's material pressure stabilizing and supplying device for an air classifier mill solves the problem of poor material floating effect within the classifying cavity, ensuring stable material delivery.

Description

Technical Field

[0001] This utility model belongs to the field of material supply technology for air jet mills, and specifically relates to a material pressure stabilizing supply device for air jet mills. Background Technology

[0002] An air jet mill is a device that uses a high-speed airflow to pulverize material particles. It is widely used in many fields such as chemical engineering, mining, and new materials. During the operation of an air jet mill, a stable supply of material has a crucial impact on the pulverizing effect and production efficiency.

[0003] However, existing material conveying methods have many problems. Some rely on mechanical transmission, which is prone to wear, jamming, and other malfunctions, leading to unstable material conveying. Other methods using gas conveying are susceptible to problems such as uneven gas flow distribution within the classification chamber, large gas pressure variations, and insufficient airflow power. This can cause some materials with the required particle size to fail to float upwards and accumulate within the classification chamber, resulting in material waste, increased production costs, and reduced overall equipment operating efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a material pressure stabilizing and supplying device for air classifiers, which solves the problem of poor material floating effect in the grading chamber and ensures stable material conveying.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a material pressure stabilizing and supplying device for an air classifier, comprising a hollow classifier shell, a cover sealed to the top opening of the hollow classifier shell, and a bottom cover sealed to the bottom opening of the hollow classifier shell, wherein the cover, the bottom cover and the hollow classifier shell form a classifier cavity. A feed pipe is connected to the lower part of the outer wall of the hollow grading shell, and a material sorting mechanism is provided on the upper part of the outer wall of the hollow grading shell. The end of the feed pipe away from the hollow grading shell is connected to a first jet nozzle that can introduce gas into the grading chamber through the feed channel provided in the feed pipe. The feed pipe is provided with a feed port corresponding to the first jet nozzle and communicating with the feed channel. The bottom cover has a plurality of second air nozzles arranged radially thereon, which can communicate with the grading chamber and are staggered, and the cover and / or the hollow grading shell and / or the bottom cover are provided with a pressure monitoring unit for monitoring the air pressure in the grading chamber.

[0006] Optionally, the material sorting mechanism includes a discharge pipe and a bearing seat disposed on the upper part of the outer wall of the hollow grading shell and communicating with the grading cavity. A drive motor is connected to the bearing seat, and the output shaft of the drive motor extends into the grading cavity through the bearing seat. A grading wheel corresponding to the discharge pipe is provided at the end of the output shaft.

[0007] Optionally, the bearing housing is provided with an air-tight channel that can surround the outer wall of the output shaft, and the outer wall of the bearing housing is provided with an air inlet that communicates with the air-tight channel and can be connected to an air source.

[0008] Optionally, the end of the bearing housing is provided with a protective shell that can cover the outer periphery of the drive motor, the airtight channel can be connected to the inner cavity of the protective shell through the gap between the output shaft and the bearing housing, and the end of the protective shell opposite to the bearing housing is provided with a vent hole.

[0009] Optionally, the feeding channel includes a first section for connecting the first jet nozzle and the feed inlet, and a second section for connecting the first section and the grading chamber, wherein the inner diameter of the first section is smaller than the inner diameter of the second section.

[0010] Optionally, the feed pipe is connected to the hollow classifier shell, the hollow classifier shell is connected to the cap, and the hollow classifier shell is connected to the bottom cover via a flange structure.

[0011] Optionally, several second jet nozzles are arranged in a circular array along the central axis of the grading chamber.

[0012] Optionally, the pressure monitoring unit includes a barometer disposed on the cover and / or the hollow grading shell and / or the bottom cover, the barometer being sealed to the cover and / or the hollow grading shell and / or the bottom cover, and the pressure-sensitive element on the barometer being placed inside the grading chamber.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: (1) When the first jet nozzle is connected to the air source, gas can be introduced into the classification chamber through the feed channel, so that the material input from the feed port can be efficiently and stably sent into the classification chamber by using gas power. When the second jet nozzle is connected to the air source, the gas ejected by the second jet nozzle can form a vortex at the bottom of the classification chamber, thereby causing the material to float and preventing the material from accumulating at the bottom of the classification chamber; (2) The pressure monitoring unit installed on the cap, hollow grading shell, and bottom cover is used to monitor the air pressure inside the grading chamber. It can monitor the real-time air pressure at multiple locations inside the grading chamber. Compared with single-location monitoring, the selective setting of multiple locations can more comprehensively capture the air pressure changes in different areas inside the grading chamber and accurately grasp the dynamic air pressure inside the grading chamber. At the same time, the pressure monitoring unit can be electrically connected to the equipment that supplies air to the first and second air nozzles, so that the working status of the equipment can be adjusted in real time according to the monitored air pressure data, that is, to increase or decrease the gas supply, so as to achieve dynamic balance of air pressure inside the grading chamber. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the material pressure stabilizing and supplying device for an air jet mill in a preferred embodiment of the present invention; Figure 2 This is a top view of the material pressure stabilizing and supplying device for an air classifier mill in a preferred embodiment of this utility model. Figure 3 This is a preferred embodiment of the present invention. Figure 2 A schematic cross-sectional view at point AA; Figure 4 This is a preferred embodiment of the present invention. Figure 3 Cross-sectional structural diagram at BB; Figure 5 This is a side view of the material pressure stabilizing and supplying device for an air jet mill in a preferred embodiment of the present invention. Figure 6 This is a preferred embodiment of the present invention. Figure 5 A cross-sectional view of the structure at point CC; The components include: 1. Hollow grading shell; 2. Cover; 3. Bottom cover; 4. Grading chamber; 5. Feed pipe; 501. First section; 502. Second section; 6. First air nozzle; 7. Feed inlet; 8. Second air nozzle; 9. Discharge pipe; 10. Bearing seat; 1001. Airtight channel; 1002. Air inlet; 11. Drive motor; 1101. Output shaft; 12. Grading wheel; 13. Protective shell; 1301. Vent hole. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0017] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0018] like Figures 1-6As shown, a material pressure stabilizing and supplying device for an air classifier includes a hollow classifying shell 1, a cover 2 sealed to the top opening of the hollow classifying shell 1, and a bottom cover 3 sealed to the bottom opening of the hollow classifying shell 1. The cover 2, the bottom cover 3, and the hollow classifying shell 1 enclose a classifying cavity 4. The classifying cavity 4 is a sealed structure that can provide a stable and independent space for material classification, avoiding the influence of the external environment on the material. A feed pipe 5 is connected to the lower part of the outer wall of the hollow classifying shell 1, and a material sorting mechanism is provided on the upper part of the outer wall of the hollow classifying shell 1. The end of the feed pipe 5 away from the hollow classifying shell 1 is connected to a first jet nozzle 6 that allows gas to be introduced into the classifying cavity 4 through a feed channel provided in the feed pipe 5. The feed pipe 5 is also provided with a feed inlet 7 corresponding to the first jet nozzle 6 and communicating with the feed channel. Material can enter the classification chamber 4 through the feed inlet 7 and the feed channel. When the first jet nozzle 6 is connected to the air source, gas can be introduced into the classification chamber 4 through the feed channel, thereby using gas power to efficiently and stably deliver the material input from the feed inlet 7 into the classification chamber 4. Compared with traditional mechanical conveying, this pneumatic material conveying method can reduce the risk of material blockage and make the material more evenly dispersed into the classification chamber 4, which is beneficial to subsequent classification operations. It should be noted that in this technical solution, the bottom cover 3 is provided with several second jet nozzles 8 arranged radially along its axis, which can communicate with the classification chamber 4 and are staggered. The second jet nozzles 8 can be connected to the air source, and after the second jet nozzles 8 are connected to the air source, they can form an air vortex at the bottom of the classification chamber 4, thereby causing the material to float and preventing the material from accumulating at the bottom of the classification chamber 4. Meanwhile, the cap 2 and / or the hollow grading shell 1 and / or the bottom cover 3 are equipped with a pressure monitoring unit for monitoring the air pressure inside the grading chamber 4. This unit can monitor the real-time air pressure at multiple locations within the grading chamber 4. Compared to single-location monitoring, the selectable setting of multiple locations allows for a more comprehensive capture of air pressure changes in different areas within the grading chamber 4, accurately grasping the dynamic air pressure within the grading chamber 4. The pressure monitoring unit is electrically connected to the equipment supplying air to the first jet nozzle 6 and the second jet nozzle 8, enabling real-time adjustment of the equipment's operating status based on the monitored air pressure data. This involves increasing or decreasing the gas supply to achieve dynamic balance of air pressure within the grading chamber 4.

[0019] Furthermore, the aforementioned pressure monitoring unit includes a barometer mounted on the cover 2 and / or the hollow classifier shell 1 and / or the bottom cover 3. The barometer is existing technology and can be used to monitor pressure changes within the classifier chamber 4. In this technical solution, the barometer can be sealed to the cover 2 and / or the hollow classifier shell 1 and / or the bottom cover 3, and the pressure-sensitive element on the barometer is placed within the classifier chamber 4. That is, the barometer can be sealed to the cover 2 and / or the hollow classifier shell 1 and / or the bottom cover 3 through various connection methods existing in the technology, such as welding and flange connections. Furthermore, such as Figure 4As shown, the material sorting mechanism includes a discharge pipe 9 and a bearing seat 10 located on the upper part of the outer wall of the hollow classifying shell 1 and communicating with the classifying chamber 4. The discharge pipe 9 can be connected to equipment such as an air jet mill, while a drive motor 11 is connected to the bearing seat 10. The output shaft 1101 of the drive motor 11 extends into the classifying chamber 4 through the bearing seat 10, and a classifying wheel 12 corresponding to the discharge pipe 9 is provided at the end of the output shaft 1101. That is, the classifying wheel 12 can rotate at high speed under the drive of the drive motor 11, and accurately screen the floating materials in the classifying chamber 4 by utilizing the combined action of centrifugal force and airflow. In this process, materials of different particle sizes and densities have different trajectories in the centrifugal force field generated by the classifying wheel 12. Among them, materials with smaller particle sizes and lower densities are more affected by airflow and can pass through the gaps of the classifying wheel 12 and be transported to the air jet mill through the discharge pipe 9; while materials with larger particle sizes and higher densities are thrown towards the inner wall of the classifying chamber 4 due to the greater centrifugal force, and thus continue to remain in the classifying chamber 4 for further classification or collection.

[0020] The above, such as Figure 5 , Figure 6 As shown, the bearing housing 10 is provided with an airtight channel 1001 that can surround the outer wall of the output shaft 1101, and the outer wall of the bearing housing 10 is provided with an air inlet 1002 that communicates with the airtight channel 1001 and can be connected to an air source. That is, when the air inlet 1002 is connected to the air source, the gas can enter the gap between the bearing housing 10 and the output shaft 1101 through the airtight channel 1001. At the same time, after the gas overcomes the pressure resistance of the overflowing gas in the classification chamber 4, it can enter the classification chamber 4 through the gap, so that the material in the classification chamber 4 cannot enter the gap between the bearing shaft and the output shaft 1101.

[0021] Furthermore, such as Figure 4 As shown, the bearing housing 10 has a protective shell 13 at its end that can cover the outer periphery of the drive motor 11. The gas-tight channel 1001 can communicate with the inner cavity of the protective shell 13 through the gap between the output shaft 1101 and the bearing housing 10. The protective shell 13 has a vent hole 1301 at its end away from the bearing housing 10. That is, the gas that overflows from the gap between the output shaft 1101 and the bearing housing 10 can be discharged through the vent hole 1301 after passing through the inner cavity of the protective shell 13, and the heat accumulated in the drive motor 11 can also be carried away by the flowing gas.

[0022] In this embodiment, the feeding channel includes a first section 501 for connecting the first jet nozzle 6 and the feed inlet 7, and a second section 502 connecting the first section 501 and the classification chamber 4. The inner diameter of the first section 501 is smaller than the inner diameter of the second section 502. This allows the first section 501, with its smaller inner diameter, to achieve initial acceleration of the material before it enters the second section 502 when the first jet nozzle 6 is connected to the air source. As the high-speed airflow carries the material through the second section 502 into the classification chamber 4, the relatively larger inner diameter of the second section 502 provides a relatively spacious transition space for the material entering the classification chamber 4. This prevents the material from spreading randomly due to a sudden entry into a larger space, helping the material to form a stable and orderly distribution within the classification chamber 4, thereby improving classification efficiency and accuracy. Example 2

[0023] like Figures 1-6 As shown, based on Embodiment 1, the feed pipe 5 is connected to the hollow classifier shell 1, the hollow classifier shell 1 is connected to the cap 2, and the hollow classifier shell 1 is connected to the bottom cover 3 via flange structures to facilitate daily disassembly, maintenance, and upkeep of the device. Furthermore, when the structures are connected via flanges, a sealing gasket can be placed on the flange end of the hollow classifier shell 1 to ensure the sealing of the connection between the cap 2, the hollow classifier shell 1, and the bottom cover 3.

[0024] Furthermore, such as Figure 1 As shown, several second jet nozzles 8 are arranged in a circular array along the central axis of the grading chamber 4 to increase the effect of material floating.

[0025] Working principle: When the first jet nozzle 6 is connected to the air source, gas can be introduced into the classification chamber 4 through the feed channel, thereby using gas power to efficiently and stably deliver the material input from the feed inlet 7 into the classification chamber 4. When the second jet nozzle 8 is connected to the air source, the gas ejected from the second jet nozzle 8 can form an air vortex at the bottom of the classification chamber 4, thereby causing the material to float and preventing the material from accumulating at the bottom of the classification chamber 4. At the same time, the air pressure monitoring unit installed on the cover 2 and / or the hollow classification shell 1 and / or the bottom cover 3 can monitor the air pressure at multiple locations in the classification chamber 4 in real time. It can also be electrically connected to the equipment supplying the air source to the first jet nozzle 6 and the second jet nozzle 8, so that the working state of the equipment can be adjusted in real time according to the monitored air pressure data, that is, the gas supply can be increased or decreased to achieve dynamic balance of air pressure in the classification chamber 4.

[0026] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A material pressure stabilizing and feeding device for an air classifier mill, characterized in that: It includes a hollow grading shell (1), a cap (2) that is sealed to the top opening of the hollow grading shell (1), and a bottom cover (3) that is sealed to the bottom opening of the hollow grading shell (1). The cap (2), the bottom cover (3) and the hollow grading shell (1) form a grading cavity (4). The lower part of the outer wall of the hollow grading shell (1) is connected to a feed pipe (5), and the upper part of the outer wall of the hollow grading shell (1) is provided with a material sorting mechanism. The end of the feed pipe (5) away from the hollow grading shell (1) is connected to a first jet nozzle (6) that can pass gas into the grading chamber (4) through the feed channel provided in the feed pipe (5). The feed pipe (5) is provided with a feed inlet (7) that corresponds to the first jet nozzle (6) and communicates with the feed channel. The bottom cover (3) is provided with a plurality of second jet nozzles (8) that can communicate with the grading chamber (4) and are staggered along its radial direction, and the cover (2) and / or the hollow grading shell (1) and / or the bottom cover (3) are provided with a pressure monitoring unit for monitoring the air pressure in the grading chamber (4).

2. The material pressure stabilizing and supplying device for an air classifier mill according to claim 1, characterized in that: The material sorting mechanism includes a discharge pipe (9) and a bearing seat (10) disposed on the upper part of the outer wall of the hollow grading shell (1) and communicating with the grading cavity (4). A drive motor (11) is connected to the bearing seat (10). The output shaft (1101) on the drive motor (11) extends into the grading cavity (4) through the bearing seat (10), and the end of the output shaft (1101) is provided with a grading wheel (12) corresponding to the discharge pipe (9).

3. The material pressure stabilizing and supplying device for an air classifier mill according to claim 2, characterized in that: The bearing housing (10) is provided with an air-tight channel (1001) that can surround the outer wall of the output shaft (1101), and the outer wall of the bearing housing (10) is provided with an air inlet (1002) that communicates with the air-tight channel (1001) and can be connected to an air source.

4. The material pressure stabilizing and supplying device for an air classifier mill according to claim 3, characterized in that: The bearing housing (10) is provided with a protective shell (13) at its end, which can cover the outer periphery of the drive motor (11). The airtight channel (1001) can be connected to the inner cavity of the protective shell (13) through the gap between the output shaft (1101) and the bearing housing (10). The protective shell (13) is provided with a vent hole (1301) at its end away from the bearing housing (10).

5. The material pressure stabilizing and supplying device for an air classifier mill according to claim 1, characterized in that: The feeding channel includes a first section (501) for connecting the first jet nozzle (6) and the feed inlet (7), and a second section (502) for connecting the first section (501) and the grading chamber (4), wherein the inner diameter of the first section (501) is smaller than the inner diameter of the second section (502).

6. The material pressure stabilizing and supplying device for an air classifier mill according to claim 1, characterized in that: The feed pipe (5) is connected to the hollow grading shell (1), the hollow grading shell (1) is connected to the cover (2), and the hollow grading shell (1) is connected to the bottom cover (3) via a flange structure.

7. The material pressure stabilizing and supplying device for an air classifier mill according to claim 1, characterized in that: Several second jet nozzles (8) are arranged in a circular array along the central axis of the grading cavity (4).

8. The material pressure stabilizing and supplying device for an air classifier mill according to claim 1, characterized in that: The pressure monitoring unit includes a barometer disposed on the cover (2) and / or the hollow grading shell (1) and / or the bottom cover (3), the barometer being sealed to the cover (2) and / or the hollow grading shell (1) and / or the bottom cover (3), and the pressure-sensitive element on the barometer being placed inside the grading chamber (4).

Images