A separator with flow guiding damping ring

Abstract

The utility model relates to a kind of sorters with flow guide damping ring, including sorter main body, mounting disc, the sorter main body is annular shape, a set of gap is evenly arranged on the annular surface of sorter main body, the gap on the annular of sorter main body is communicated with annular interior, the one end surface of the sorter main body is hermetically screwed with mounting disc, flow guide damping ring is arranged on the other end surface of sorter main body, and the flow guide damping ring extends to form discharge port to sorter main body inside. The air flow path of the present application is lengthened by the effect of flow guide damping ring, the air flow path of the air flow entering from different positions of sorter is similar, the air flow speed is similar, the particle size of the carried material particle is similar, that is, the particle size distribution of the particle passing through sorter is concentrated, to improve the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of airflow milling technology, specifically a sorter with a flow-guiding damping ring. Background Technology

[0002] An air jet mill consists of a main unit, compressor, fan, classifier, filter, and piping. The classifier is the key component. The air jet mill utilizes the strong multiphase turbulent flow field created by the high-speed airflow to cause material particles in the grinding chamber to pulverize through self-collision, friction, or collision and friction with the inner wall of the equipment. The interior of the classifier is in a low-pressure zone, while the outer surface is in a high-pressure zone. The high-pressure airflow passes through the gaps in the classifier, entering the low-pressure zone from the high-pressure zone. The pulverized material particles are transported to the classifier by the rising airflow, moving from the high-pressure zone to the low-pressure zone with the high-pressure airflow, where they are separated according to particle size and collected.

[0003] As attached Figure 1 , 2 As shown, driven by gas, the pulverized material particles pass through the gaps in the separator, entering the low-pressure zone inside the separator from the high-pressure zone on the outside. Because the pressure is lower at the end near the outlet and higher at the end further away, even with the same external pressure, the pressure difference between the two ends—a larger difference near the outlet and a smaller difference further away—results in different airflow velocities and paths. The pressure differences between the inside and outside of the separator at points a, b, and c in the diagram are different, and the airflow paths are different, resulting in a gradient distribution of particle velocity. For example, at point a, the airflow path from the high-pressure zone to the low-pressure zone is longer, and the airflow velocity is slower; at point c, the airflow path is shorter, and the airflow velocity is faster. A shorter airflow path and faster airflow velocity from the high-pressure zone to the low-pressure zone increases the probability of large particles being carried into the separator; conversely, a longer airflow path and slower airflow velocity from the high-pressure zone to the low-pressure zone decrease the probability of large particles being carried into the separator. Therefore, in existing separators, the airflow path from the high-pressure zone to the low-pressure zone is different at different locations, and the airflow speed is different. This results in the particle size distribution of the material after being separated by the separator being uneven, and the product quality being low. Summary of the Invention

[0004] The purpose of this invention is to provide a separator with a flow-guiding damping ring. When the airflow carrying material particles enters the separator, under the same external pressure, the pressure inside the separator near the discharge port and far from the discharge port is made similar under the action of the flow-guiding damping ring. This makes the airflow velocity entering from different positions of the separator similar, resulting in a more concentrated particle size distribution of the material particles after separation by the separator compared to conventional separators.

[0005] The technical solution of this utility model:

[0006] A separator with a flow-guiding damping ring includes a separator body and a mounting plate. The separator body is circular in shape, and a set of gaps are evenly distributed on the surface of the circular ring of the separator body. The gaps on the circular ring of the separator body communicate with the interior of the circular ring. One end face of the separator body is connected to the mounting plate with a sealed thread. A flow-guiding damping ring is provided on the other end face of the separator body. The flow-guiding damping ring extends into the inner side of the separator body to form a discharge port. The length of the flow-guiding damping ring is less than half the length of the gaps on the surface of the circular ring of the separator body.

[0007] The beneficial effects of this utility model are:

[0008] 1. This application incorporates a flow-guiding damping ring at the discharge port of the separator, ensuring that the internal and external pressure differences between the end of the separator near and the end far from the discharge port are similar, resulting in similar airflow paths and velocities. Furthermore, the airflow within the separator creates an isobaric airflow field. This isobaric airflow field maintains a relatively stable pressure difference with the high-pressure zone, causing the airflow velocity from the outer high-pressure zone to the inner low-pressure zone to approach the same value. Specifically, the velocity at point g approaches the velocities at points e and f. This similar airflow velocity facilitates the carrying of particles of the same volume at the same speed, resulting in a concentrated particle size distribution after separation by the separator. This improved product quality benefits subsequent production process quality control, enhances product performance, and increases economic efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the airflow path in a conventional sorting device.

[0011] Figure 2 for Figure 1 The diagram shows the gradient velocity of the airflow from the high-pressure zone to the low-pressure zone in the sorter.

[0012] Figure 3 This is an isometric view of the sorting device with a flow-guiding damping ring of this utility model;

[0013] Figure 4 This is a front view of the sorter with a flow-guiding damping ring according to this utility model;

[0014] Figure 5 for Figure 4 AA section view;

[0015] Figure 6 for Figure 4 BB cross-sectional view;

[0016] Figure 7 This is a schematic diagram of the airflow path of the sorter in this application.

[0017] Figure 8 for Figure 7 The diagram shows the gradient velocity of the airflow from the high-pressure zone to the low-pressure zone in the sorter.

[0018] Figure 9 This is a half-sectional view of the sorter with a flow-guiding damping ring (the outer surface of the flow-guiding damping ring is curved) of this utility model;

[0019] Figure 10 This is a half-sectional view of the sorter with a flow-guiding damping ring (the outer surface of the flow-guiding damping ring is a straight line) of this utility model;

[0020] Figure 11 This is a half-sectional view of the sorter with a flow-guiding damping ring (the outer surface curve of the flow-guiding damping ring is a convex line) of this utility model.

[0021] Figure 12 This is a half-sectional view of the sorter with a flow-guiding damping ring of this utility model (the outer surface curve of the flow-guiding damping ring is a concave line);

[0022] Figure label:

[0023] In the diagram: 1. Main body of the sorter; 2. Mounting plate; 3. Gap; 4. Flow guide damping ring; 5. Discharge port; 6. Outer surface; 7. Isobaric airflow field. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that in the description of this utility model, terms such as "inner" and "outer" that indicate direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0026] To address the problems in the background technology, this utility model provides a separator with a flow-guiding damping ring. The separator is suitable for air jet mills, air jet pulverizers, air jet separators, Raymond mills, and other air jet grinding and sorting equipment. In industrial production, it can efficiently classify particles according to their size, ensuring a concentrated particle size distribution and improving product quality.

[0027] like Figure 3-12 As shown, a separator with a flow-guiding damping ring includes a separator body 1 and a mounting plate 2. The separator body 1 is annular in shape, and a set of gaps 3 are evenly arranged on the annular surface of the separator body 1. The gaps on the annular surface of the separator body 1 communicate with the interior of the annular surface. One end face of the annular surface of the separator body 1 is connected to the mounting plate with a sealed thread. A flow-guiding damping ring 4 is provided on the other end face of the annular surface of the separator body 1. The flow-guiding damping ring 4 extends into the inner side of the separator body to form a discharge port 5. The length of the flow-guiding damping ring 4 is less than half the length of the gaps 3 on the annular surface of the separator body 1. In the figure, A represents the length of the gaps on the annular surface of the separator body, and B represents the length of the flow-guiding damping ring, i.e., B < 1 / 2A.

[0028] Further optimization, such as Figure 9-12 As shown, the outer surface 6 of the flow-guiding damping ring 4 (the outer surface referred to here is the side of the flow-guiding damping ring facing the outside of the sorter body) is a curved surface or a straight surface.

[0029] Further optimization, such as Figure 9 , 11 As shown in Figures 1 and 12, the outer surface 6 of the flow-guiding damping ring 4 is either an inward concave surface or an outward convex surface.

[0030] The working principle of the sorter with flow-guiding damping ring in this application is as follows:

[0031] like Figure 7 , 8As shown, a flow-guiding damping ring 4 is installed at the discharge port 5 of the separator, so that the pressure at the end near the discharge port and the end far from the discharge port inside the separator are similar, and the pressure difference at both ends is similar. This makes the airflow velocity entering from different positions of the separator similar, and the airflow flows inside the separator, forming an isobaric airflow field 7 (circled in the figure) inside the separator. The isobaric airflow field inside the separator and the pressure difference in the high-pressure zone are relatively stable, so that the airflow velocity from the high-pressure zone to the low-pressure zone of the separator tends to be the same, that is, the velocity at point g tends to be the velocity at points e and f. The airflow velocity is the same, which leads to the particle flow velocity entering the separator from the high-pressure zone tending to be equal. In the grinding chamber of the air jet mill, after the material is ground, it is carried by high-speed gas and enters the separator through the gaps on the outer periphery of the separator body. It flows from the high-pressure zone to the low-pressure zone inside the separator. Because the gas flow velocity entering the separator from the high-pressure zone tends to be equal, the path lengths of the airflow e, f, and g are similar. As a result, the airflow entering from the gaps in the separator body carries material particles of similar size. That is, the particle size distribution through the separator is concentrated, which improves the quality of the product.

[0032] Example 1:

[0033] like Figure 9 As shown, a separator with a flow-guiding damping ring includes a separator body and a mounting plate. The separator body is annular in shape, with a set of gaps evenly distributed on its annular surface. These gaps communicate with the interior of the annular body. One end face of the separator body annularly connected to the mounting plate via a sealed thread. A flow-guiding damping ring is positioned on the other end face of the separator body annularly connected to the mounting plate. The flow-guiding damping ring extends inward toward the separator body to form a discharge port. The length of the flow-guiding damping ring is two-fifths of the length of the gaps on the surface of the separator body annularly connected to the annular body. The outer surface of the flow-guiding damping ring is concave inward.

[0034] Example 2:

[0035] like Figure 10 As shown, a separator with a flow-guiding damping ring comprises a separator body and a mounting plate. The separator body is annular in shape, with a set of gaps evenly distributed on its annular surface. These gaps communicate with the interior of the annular body. One end face of the separator body annularly connected to the mounting plate via a sealed thread. A flow-guiding damping ring is positioned on the other end face of the separator body annularly connected to the mounting plate. The flow-guiding damping ring extends inward toward the separator body to form a discharge port. The length of the flow-guiding damping ring is three-tenths of the length of the gaps on the surface of the separator body annularly connected to the annular body. The outer surface of the flow-guiding damping ring is straight.

[0036] Example 3:

[0037] like Figure 11As shown, a separator with a flow-guiding damping ring includes a separator body and a mounting plate. The separator body is annular in shape, with a set of gaps evenly distributed on its annular surface. These gaps communicate with the interior of the annular body. One end face of the separator body annularly connected to the mounting plate via a sealed thread. A flow-guiding damping ring is positioned on the other end face of the separator body annularly connected to the mounting plate. The flow-guiding damping ring extends inward toward the separator body to form a discharge port. The length of the flow-guiding damping ring is one-fifth of the length of the gaps on the surface of the separator body annularly connected to the annular body. The outer surface of the flow-guiding damping ring is an outwardly convex surface.

[0038] Comparative example:

[0039] like Figure 1 As shown, a conventional separator in the prior art includes a separator body, which is a split structure. One side of the separator body is fixedly installed to the power input shaft via a mounting plate, and the other side has a discharge port in the middle. No flow guide damping ring is installed outside the discharge port.

[0040] Note: In particle size analyzers, D90 and D10 are two important parameters, representing the particle size values ​​corresponding to a cumulative percentage of 90% and 10% of the particle size distribution, respectively. The ratio of these two parameters (D90 / D10) provides important information about the width of the particle size distribution, thus reflecting product quality. A larger ratio indicates a wider particle size distribution and lower quality, while a smaller ratio indicates a more concentrated particle size distribution and higher quality. Existing methods for changing the D90 / D10 ratio include: 1. altering the particle size distribution of the raw material itself; 2. adjusting the airflow pressure and velocity; 3. adjusting the rotational speed of the separator; and 4. adjusting the gap size around the separator's outer perimeter.

[0041] The separators from Examples 1-3 and the comparative example were applied to an air classifier mill to separate materials. All the factors affecting the D90 / D10 ratio were the same, only the structure of the separator differed. Particle size distribution was measured using a laser particle size analyzer from Synpatek GmbH, Germany.

[0042] The table below compares the technical parameters of the fine powder materials separated by the separators in Examples 1-3 and the comparative example, measured using a laser particle size analyzer. SMD represents the specific surface area average diameter, and VMD represents the volume average diameter. As can be seen from the table, the separator with the flow-guiding damping ring of this invention has a smaller D90 / D10 ratio than the separators in the prior art, improving the particle size distribution width of the fine powder materials, making the particle size distribution more concentrated, and improving product quality.

[0043]

[0044] In summary, this invention improves product quality by adding a flow-guiding damping ring to one end of the discharge port of the air classifier, thereby concentrating the particle size distribution of the crushed and sorted material.

[0045] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art, inspired by this description, design similar structures and implementations to the above embodiments without departing from the technical essence of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A sorter with a flow-guiding damping ring, characterized in that: The device includes a separator body and a mounting plate. The separator body is circular in shape, with a set of gaps evenly distributed on the surface of the circular ring. The gaps on the circular ring of the separator body are connected to the interior of the ring. One end of the separator body is connected to the mounting plate with a sealing bolt. A flow-guiding damping ring is provided on the other end of the separator body. The flow-guiding damping ring extends into the inside of the separator body to form a discharge port. The length of the flow-guiding damping ring is less than half the length of the gaps on the surface of the circular ring of the separator body.

2. A sorter with a flow-guiding damping ring according to claim 1, characterized in that: The outer surface of the flow-guiding damping ring is curved or straight.

3. A sorter with a flow-guiding damping ring according to claim 2, characterized in that: The outer surface of the flow-guiding damping ring is either an inward concave surface or an outward convex surface.

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