A talc air jet mill

Abstract

This utility model relates to a talc air jet mill, comprising a grinding chamber, a cone, a cylinder, a discharge cylinder, and a drive device. A slag discharge port is provided at the lower end of the grinding chamber, and a feed inlet is provided on the side wall of the grinding chamber. The cone is fixedly placed at the upper end of the grinding chamber and communicates with it. Multiple guide plates are fixedly installed at the connection between the cone and the grinding chamber, and the guide plates are arranged at equal intervals. The cylinder is fixedly placed at the upper end of the cone and communicates with it. A rotatable classifying wheel is installed inside the cylinder. The discharge cylinder is fixedly placed at the upper end of the cylinder and communicates with it. A discharge port is provided on the side wall of the discharge cylinder. The drive device is fixedly placed at the upper end of the discharge cylinder, and a rotating shaft is connected to the output end of the drive device. The rotating shaft passes through the discharge cylinder and connects to the classifying wheel inside the cylinder. The drive device drives the classifying wheel to rotate through the rotating shaft. Compared with the prior art, this utility model reduces the collision of coarse talc with the classifying wheel, extends its service life, and reduces the cost of maintaining or replacing the classifying wheel.

Description

Technical Field

[0001] This utility model relates to the technical field of talc production equipment, and more specifically, to a talc airflow mill. Background Technology

[0002] An air jet mill, also known as an air jet pulverizer, is a device that uses high-speed airflow to pulverize material particles by causing them to collide, rub against each other, or impact and shear against equipment components.

[0003] Air jet mills utilize filtered and dried compressed air, which is then injected at high speed into the grinding chamber through Laval nozzles. At the confluence of multiple high-pressure airflows, the material is repeatedly pulverized through collisions, friction, and shearing. The pulverized material is then carried by the rising airflow to the classification zone by the suction force of the fan. Under the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated. Fine particles that meet the particle size requirements are collected by the classification wheel into the cyclone separator and dust collector, while coarse particles descend to the grinding zone for further pulverization.

[0004] However, existing air jet mills still have some problems. After the material is repeatedly collided, rubbed, and sheared to be crushed into coarse and fine materials, the coarse and fine materials are classified under the action of the classifying wheel. However, the excessively coarse material is constantly colliding with the classifying wheel under the action of high-pressure airflow, which can easily damage the classifying wheel. The classifying wheel is expensive, and the subsequent maintenance and replacement costs are high after it is damaged. Therefore, it is necessary to solve this problem. Utility Model Content

[0005] This invention aims to at least partially solve one of the aforementioned technical problems in the prior art. Therefore, one objective of this invention is to provide a talc air jet mill that reduces the impact of coarse talc on the grading wheel, extends its service life, and lowers the cost of maintaining or replacing the grading wheel.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a talc airflow mill, comprising: The grinding chamber has a slag discharge port at its lower end and a feed inlet on its side wall. A conical cylinder is fixedly placed at the upper end of the grinding chamber and communicates with the grinding chamber; multiple guide plates are fixedly provided at the connection between the conical cylinder and the grinding chamber, and the multiple guide plates are arranged at equal intervals. A cylindrical body is fixedly placed at the upper end of the conical cylinder and communicates with the cylindrical body; a rotatable classifying wheel is provided inside the cylindrical body; A discharge cylinder is fixedly placed at the upper end of the cylinder body and communicates with the cylinder body; a discharge port is provided on the side wall of the discharge cylinder; A driving device is fixedly placed at the upper end of the discharge cylinder. The output end of the driving device is connected to a rotating shaft. The rotating shaft passes through the discharge cylinder and is connected to a classifying wheel inside the cylinder. The driving device drives the classifying wheel to rotate through the rotating shaft.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, it also includes: A baffle ring is fixedly connected to the inner wall of the upper end of the cone; a guide port is provided in the middle of the baffle ring, and the diameter of the guide port is larger than the diameter of the connection port between the cone and the grinding chamber.

[0009] Furthermore, it also includes: A baffle plate is placed at the bottom of the inner side of the cylinder, below the grading wheel; the baffle plate is fixedly connected to the inner wall of the cylinder by multiple connecting rods.

[0010] Furthermore, it also includes: A bushing is placed inside the discharge cylinder and fitted onto the rotating shaft.

[0011] Furthermore, it also includes: An air chamber is fixedly mounted on the lower end of the grinding chamber, and the air chamber is connected to the grinding chamber through a connecting pipe.

[0012] Furthermore, it also includes: The system has three legs, which are arranged at equal intervals and are all fixedly connected to the air chamber.

[0013] The beneficial effects of this utility model are: by arranging multiple guide plates to guide the airflow entering the cylinder of the grinding chamber, the friction of the coarse talc increases when it moves close to the inner wall of the cone, thus increasing the resistance to the movement of the coarse talc. This makes it easier for the coarse talc to fall back into the grinding chamber for further crushing, thereby reducing the collision of the coarse talc with the classifying wheel, further extending the service life of the classifying wheel, and reducing the cost of maintaining or replacing the classifying wheel. Attached Figure Description

[0014] Figure 1 This is a front view of a talc airflow mill according to the present invention; Figure 2 for Figure 1 AA section view; Figure 3 This is a top view of the material retaining ring of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Grinding chamber; 101. Slag discharge port; 102. Feed inlet; 2. Cone, 3. Baffle, 4. Cylinder body, 5. Stager wheel; 6. Discharge cylinder; 601. Discharge port; 7. Drive unit; 8. Rotating shaft; 9. Material retaining ring; 901. Material guide port; 10. Baffle plate, 11. Connecting rod, 12. Bushing, 13. Air chamber, 14. Connecting pipe, 15. Support leg. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] like Figure 1 and Figure 2 As shown, a talc air jet mill includes: The grinding chamber 1 has a slag discharge port 101 at its lower end and a feed inlet 102 on its side wall. A cone cylinder 2 is fixedly placed at the upper end of the grinding chamber 1 and communicates with the grinding chamber 1; a plurality of guide plates 3 are fixedly provided at the connection between the cone cylinder 2 and the grinding chamber 1, and the plurality of guide plates 3 are arranged at equal intervals. A cylindrical body 4 is fixedly placed at the upper end of the conical cylinder 2 and communicates with the cylindrical body 4; a rotatable grader wheel 5 is provided inside the cylindrical body 4; The discharge cylinder 6 is fixedly placed at the upper end of the cylinder body 4 and communicates with the cylinder body 4; the discharge port 601 is provided on the side wall of the discharge cylinder 6. A driving device 7 is fixedly placed at the upper end of the discharge cylinder 6. The output end of the driving device 7 is connected to a rotating shaft 8. The rotating shaft 8 passes through the discharge cylinder 6 and is connected to the classifying wheel 5 inside the cylinder body 4. The driving device 7 drives the classifying wheel 5 to rotate through the rotating shaft 8.

[0018] In this specific application, the grinding chamber 1 introduces high-pressure airflow through the air inlet on the side wall, and talc is introduced through the feed inlet 102. The talc in the grinding chamber 1 is subjected to repeated collisions, friction, and shearing by the high-pressure airflow, resulting in pulverized talc. The resulting coarse and fine talc enter the conical cylinder 2 with the airflow. The bottom inner diameter of the conical cylinder 2 is smaller than its top inner diameter. After the airflow enters the conical cylinder 2 from the grinding chamber 1, the space increases, thereby reducing the air pressure. The airflow force on the coarse and fine talc decreases. Under conditions of excessive gravity, the coarse talc experiences a greater gravitational force. Under the influence of airflow, coarse talc falls back into the grinding chamber 1 for further crushing; while the gravity of fine talc is less than the force of airflow, the fine talc is carried by the airflow into the cylinder 4; the driving device 7 drives the classifying wheel 5 to rotate, and the classifying wheel 5 sorts the fine talc during rotation, screening out the talc powder that meets the requirements; the sorted talc powder is discharged through the discharge port 601 of the discharge cylinder 6; this reduces the collision of coarse talc with the classifying wheel, reduces damage to the classifying wheel, extends the service life of the classifying wheel, and reduces the cost of maintaining or replacing the classifying wheel.

[0019] In addition, multiple guide plates 3 are arranged at equal intervals along the inner wall of the cone 2 and are inclined upwards to guide the airflow entering the cylinder 4 from the grinding chamber 1, so that the airflow swirls. Under the action of centrifugal force, the coarse talc and fine talc in the airflow are more likely to move closer to the inner wall of the cone 2. When the coarse talc moves close to the inner wall of the cone 2, its friction increases and the resistance to the movement of the coarse talc increases. This makes it easier for the coarse talc to fall back into the grinding chamber 1 for further crushing, thereby reducing the collision of coarse talc with the classifying wheel, further extending the service life of the classifying wheel, and reducing the cost of maintaining or replacing the classifying wheel.

[0020] In the above embodiments, such as Figure 3 As shown, it also includes: A baffle ring 9 is fixedly connected to the inner wall of the upper end of the cone cylinder 2; a guide port 901 is provided in the middle of the baffle ring 9, and the diameter of the guide port 901 is larger than the diameter of the connection port between the cone cylinder 2 and the grinding chamber 1.

[0021] In the specific application of this embodiment, the coarse talc and fine talc in the airflow are subjected to centrifugal force, and the coarse talc is more likely to move closer to the inner wall of the cone 2. The baffle ring 9 is used to obstruct the talc moving close to the inner wall of the cone 2, so that more coarse talc can fall back into the grinding chamber 1 for further crushing, thereby improving the efficiency of coarse talc falling back. In addition, the diameter of the feed inlet 901 is larger than the diameter of the connection between the cone 2 and the grinding chamber 1, so as to avoid the feed inlet 901 from obstructing the airflow and ensuring smooth airflow, thereby ensuring the sorting efficiency of fine talc.

[0022] The above embodiments also include: A baffle plate 10 is placed at the bottom of the inner side of the cylinder 4 and is located below the grading wheel 5. The baffle plate 10 is fixedly connected to the inner wall of the cylinder 4 by a plurality of connecting rods 11.

[0023] In this specific application, the airflow introduced into the cone 2 carries fine talc; the baffle plate 10 diverts the airflow to prevent the airflow and fine talc from flowing directly to the classifying wheel 5, thereby reducing the resistance or interference caused by the airflow to the rotation of the classifying wheel 5; it also allows the fine talc to enter the classifying wheel 5 laterally for sorting, making the fine talc sorted by the classifying wheel 5 of uniform size, with higher quality fine talc, and also ensuring the rotation efficiency of the classifying wheel 5.

[0024] The above embodiments also include: A bushing 12 is placed inside the discharge cylinder 6 and fitted onto the rotating shaft 8.

[0025] In this specific application, the bushing 12 is used to protect the rotating shaft 8, so as to avoid damage to the rotating shaft 8 during the process of the discharge cylinder 6 discharging fine talc, and to ensure the rotation efficiency of the rotating shaft 8.

[0026] The above embodiments also include: Air chamber 13 is fixedly mounted on the lower end of the grinding chamber 1, and the air chamber 13 is connected to the grinding chamber 1 through a connecting pipe 14.

[0027] In a specific application of this embodiment, the internal space of the air chamber 13 can buffer and regulate the airflow in the grinding chamber 1. The airflow entering from the external air source may have certain fluctuations in pressure, flow rate, and other states. The air chamber 13 can homogenize the airflow to a certain extent, allowing the airflow to enter the grinding chamber 1 with relatively stable pressure, flow rate, and other parameters. This enables the material crushing, grading, and other operations to be carried out in an orderly manner.

[0028] The above embodiments also include: Three support legs 15 are arranged at equal intervals, and all three support legs 15 are fixedly connected to the air chamber 13.

[0029] In this specific application, three support legs 15 are used to support the air chamber 13 and the entire air mill, so as to keep the air mill running more stably and ensure the efficiency of talc crushing and sorting.

[0030] 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. A talc air jet mill, characterized in that, include: The grinding chamber has a slag discharge port at its lower end and a feed inlet on its side wall. A conical cylinder is fixedly placed at the upper end of the grinding chamber and communicates with the grinding chamber; multiple guide plates are fixedly provided at the connection between the conical cylinder and the grinding chamber, and the multiple guide plates are arranged at equal intervals. A cylindrical body is fixedly placed at the upper end of the conical cylinder and communicates with the cylindrical body; a rotatable classifying wheel is provided inside the cylindrical body; A discharge cylinder is fixedly placed at the upper end of the cylinder body and communicates with the cylinder body; a discharge port is provided on the side wall of the discharge cylinder; A driving device is fixedly placed at the upper end of the discharge cylinder. The output end of the driving device is connected to a rotating shaft. The rotating shaft passes through the discharge cylinder and is connected to a classifying wheel inside the cylinder. The driving device drives the classifying wheel to rotate through the rotating shaft.

2. The talc air jet mill according to claim 1, characterized in that, Also includes: A baffle ring is fixedly connected to the inner wall of the upper end of the cone; a guide port is provided in the middle of the baffle ring, and the diameter of the guide port is larger than the diameter of the connection port between the cone and the grinding chamber.

3. The talc airflow mill according to claim 2, characterized in that, Also includes: A baffle plate is placed at the bottom of the inner side of the cylinder, below the grading wheel; the baffle plate is fixedly connected to the inner wall of the cylinder by multiple connecting rods.

4. The talc air jet mill according to claim 1, characterized in that, Also includes: A bushing is placed inside the discharge cylinder and fitted onto the rotating shaft.

5. The talc air jet mill according to claim 1, characterized in that, Also includes: An air chamber is fixedly mounted on the lower end of the grinding chamber, and the air chamber is connected to the grinding chamber through a connecting pipe.

6. The talc air jet mill according to claim 5, characterized in that, Also includes: The system has three legs, which are arranged at equal intervals and are all fixedly connected to the air chamber.

Images