A modified air outlet end of a powder classifier

Abstract

The utility model discloses a kind of powder concentrator of modified air outlet end, belong to powder sorting equipment technical field, comprising: micro-pulverizer and powder concentrator barrel;The top discharge end of the micro-pulverizer is fixedly connected with the connecting barrel between the powder concentrator barrel, the top discharge end of the powder concentrator barrel is detachably connected with discharge elbow pipe by bolt, the discharge elbow pipe is bently connected with the discharge end of the powder concentrator barrel at 30 ° angle;The outer wall of the discharge elbow pipe is integrally formed with connecting housing, upper bearing is located in the connecting housing, lower bearing is located in the powder concentrator barrel, the upper bearing is aligned with lower bearing along vertical direction, the discharge elbow pipe of the utility model discharge end adopts 30 ° elbow pipe structure, so that material flow is more smooth, avoid the generation of top turbulence, and then main shaft is supported by upper and lower bearings, and outer sleeve is provided with protective tube, can effectively isolate powder and main shaft, reduce abrasion.

Description

Technical Field

[0001] This utility model relates to the field of powder sorting equipment technology, specifically a modified air outlet powder classifier. Background Technology

[0002] Air classifiers are key equipment used in industries such as cement, building materials, and mining for material sorting. They are mainly used to classify ground materials according to particle size into fine powder and coarse powder. Micro powder mills are a type of high-efficiency grinding equipment used to process ultrafine powders and are widely used in industries such as building materials, chemicals, metallurgy, and pharmaceuticals. Air classifiers are often used in conjunction with micro powder mills. During use, the air outlet of the casing usually adopts a horizontal straight pipe for material discharge. This structure is relatively simple to manufacture and process, but it has the following shortcomings in actual operation: The horizontal air outlet structure is prone to turbulence at the top of the discharge port, which causes the flow of fine powder to be irregular, increasing the resistance of the air carrying the material. Under turbulent conditions, the high-speed airflow carries powder and comes into long-term contact with the main shaft of the air classifier, which can easily cause wear on the surface of the main shaft and reduce its service life.

[0003] Based on this, this utility model designs a modified air outlet classifier to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a modified air outlet classifier to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a modified air outlet classifier, comprising: a micro powder mill and a classifier cylinder; a connecting cylinder is fixedly connected between the top discharge end of the micro powder mill and the classifier cylinder, and a discharge bend is detachably connected to the top discharge end of the classifier cylinder by bolts, the discharge bend being bent at a 30° angle to the discharge end of the classifier cylinder; The outer wall of the discharge bend is integrally formed with a connecting shell. An upper bearing is provided inside the connecting shell, and a lower bearing is provided inside the classifier cylinder. The upper bearing and the lower bearing are aligned in the vertical direction. A main shaft passes through the rotating parts of the upper bearing and the lower bearing. A protective tube is fixedly connected to the fixing parts of the upper bearing and the lower bearing, and the protective tube is sleeved on the outside of the main shaft.

[0006] Preferably, a three-phase squirrel-cage motor is detachably connected to the top of the connecting housing by bolts, and the drive shaft of the three-phase squirrel-cage motor is connected to one end of the main shaft via a coupling.

[0007] Preferably, an impeller is fixedly connected to the end of the main shaft away from the three-phase squirrel-cage motor, and the impeller is disposed inside the classifier cylinder.

[0008] Preferably, the outer wall of the connecting cylinder is fixedly connected to a feed pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: the discharge bend at the discharge end adopts a 30° bend structure, which makes the material flow smoother and avoids the generation of top turbulence. The main shaft is supported by upper and lower bearings and is covered with a protective tube, which can effectively isolate the powder from the main shaft and reduce wear. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this embodiment; Figure 2 This is a schematic diagram highlighting the internal structure of the air classifier cylinder in this embodiment.

[0012] The attached diagram lists the components represented by each number as follows: 1. Micro powder mill; 2. Connecting cylinder; 3. Classifier cylinder; 4. Discharge bend; 5. Connecting shell; 6. Upper bearing; 7. Lower bearing; 8. Main shaft; 9. Protective pipe; 10. Three-phase squirrel cage motor; 11. Impeller; 12. Feed pipe. Detailed Implementation

[0013] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-2 This utility model provides a technical solution: a modified air outlet classifier, including: a micro powder mill 1 and a classifier cylinder 3; a connecting cylinder 2 is fixedly connected between the top discharge end of the micro powder mill 1 and the classifier cylinder 3, and a discharge bend 4 is detachably connected to the top discharge end of the classifier cylinder 3 by bolts, and the discharge bend 4 is bent at a 30° angle to the discharge end of the classifier cylinder 3; The outer wall of the discharge bend 4 is integrally formed with a connecting shell 5. The connecting shell 5 is provided with an upper bearing 6 and the classifier cylinder 3 is provided with a lower bearing 7. The upper bearing 6 and the lower bearing 7 are aligned in the vertical direction. A main shaft 8 is passed between the rotating parts of the upper bearing 6 and the lower bearing 7. A protective tube 9 is fixedly connected to the fixed parts of the upper bearing 6 and the lower bearing 7. The protective tube 9 is sleeved on the outside of the main shaft 8. The micro powder mill 1 is connected to the classifier cylinder 3 through the connecting cylinder 2 to ensure that the powder enters the classifier smoothly. The discharge port is changed from a horizontal straight pipe to a 30° bend pipe to make the gas-solid two-phase flow direction more reasonable and reduce turbulence. The main shaft 8 is supported and positioned by upper and lower bearings to ensure stable rotation. The protective pipe 9 is sleeved on the outside of the main shaft 8 to isolate the powder airflow from the main shaft 8 and prevent the powder from directly scouring the main shaft 8.

[0015] More preferably, a three-phase squirrel-cage motor 10 is detachably connected to the top of the connecting housing 5 by bolts, and the drive shaft of the three-phase squirrel-cage motor 10 is connected to one end of the main shaft 8 via a coupling. A three-phase squirrel-cage motor 10 is installed at the top of the connecting housing 5. The motor drive shaft is connected to the main shaft 8 via a coupling. The three-phase squirrel-cage motor 10 transmits torque to the main shaft 8 through the coupling, achieving precise and stable rotation drive.

[0016] More preferably, an impeller 11 is fixedly connected to one end of the main shaft 8 away from the three-phase squirrel-cage motor 10, and the impeller 11 is located inside the classifier cylinder 3; The three-phase squirrel-cage motor 10 drives the main shaft 8 to rotate, and the main shaft 8 drives the impeller 11 to rotate at high speed. The powder is classified by using airflow and centrifugal force. The cooperation between the impeller 11 and the airflow allows the fine powder to be discharged smoothly, while the coarse powder falls back into the mill.

[0017] More preferably, the outer wall of the connecting cylinder 2 is fixedly connected to a feed pipe 12; Material can be added to or adjusted into the connecting cylinder 2 through the feed pipe 12, so that it can be combined with the output of the micro powder mill 1.

[0018] One specific application of this embodiment is as follows: Material enters the main body of the micro powder mill 1 through the feed pipe 12 and is ground inside the micro powder mill 1. After grinding, the powder, driven by negative pressure air, enters the powder selection space of the classifier cylinder 3 from the connecting cylinder 2 at the top of the micro powder mill 1. Under the drive of negative pressure air, fine powder enters the center of the impeller 11 through the gap between the blades of the rotating impeller 11 and then enters the 30° curved discharge bend 4. It then enters the finished product collection system connected to the rear end more smoothly. Coarser particles are blocked by the high-speed rotating impeller 11 and enter the micro powder mill 1 again for re-grinding under the action of gravity. This operation is repeated. During this process, the high-speed airflow carrying powder will come into contact with the protective pipe 9. Before the protective pipe 9 of the main shaft 8 is damaged, the main shaft 8 of the classifier can be fully protected, thus extending its service life.

[0019] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical 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 or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modified air outlet classifier, characterized in that, include: Micro powder mill (1) and classifier cylinder (3); a connecting cylinder (2) is fixedly connected between the top discharge end of the micro powder mill (1) and the classifier cylinder (3), and a discharge bend (4) is detachably connected to the top discharge end of the classifier cylinder (3) by bolts, and the discharge bend (4) is bent at a 30° angle to the discharge end of the classifier cylinder (3); The outer wall of the discharge bend (4) is integrally formed with a connecting shell (5). The connecting shell (5) is provided with an upper bearing (6). The classifier cylinder (3) is provided with a lower bearing (7). The upper bearing (6) and the lower bearing (7) are aligned in the vertical direction. A main shaft (8) is provided between the rotating parts of the upper bearing (6) and the lower bearing (7). A protective tube (9) is fixedly connected to the fixed parts of the upper bearing (6) and the lower bearing (7). The protective tube (9) is sleeved on the outside of the main shaft (8).

2. The modified air outlet classifier according to claim 1, characterized in that: The top of the connecting housing (5) is detachably connected to a three-phase squirrel cage motor (10) by bolts. The drive shaft of the three-phase squirrel cage motor (10) is connected to one end of the main shaft (8) via a coupling.

3. The modified air outlet classifier according to claim 1, characterized in that: An impeller (11) is fixedly connected to one end of the main shaft (8) away from the three-phase squirrel cage motor (10), and the impeller (11) is located inside the classifier cylinder (3).

4. The modified air outlet classifier according to claim 1, characterized in that: The outer wall of the connecting cylinder (2) is fixedly connected to a feed pipe (12).

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