Double-effect powder concentrator

Abstract

The utility model belongs to the technical field of powder grinding and selecting, and particularly relates to a double-effect powder selecting machine which comprises a shell, an air outlet, a secondary powder selecting airflow inlet, a discharging pipe and a primary powder selecting airflow inlet are arranged on the shell in a penetrating mode, the discharging pipe is arranged at the bottom of the shell, and a rotor assembly, a first powder selecting airflow inlet and a second powder selecting airflow inlet are sequentially arranged in the shell. The air outlet is formed in the top of the shell and communicates with the rotor assembly, a primary airflow guide blade assembly and a secondary airflow guide blade assembly are sequentially arranged on the side edge of the rotor assembly from top to bottom in a surrounding and parallel mode, and an airflow channel is formed in the shell. Two groups of airflow guide blades, namely the primary airflow guide blade and the secondary airflow guide blade, are matched with the rotor assembly, so that two times of powder selection can be formed, and the powder selection efficiency is improved. In other words, secondary separation is conducted again after primary powder separation airflow is separated, and therefore the effect of improving powder separation is achieved.

Description

Technical Field

[0001] This utility model relates to the field of powder grinding and classifying technology, specifically a dual-effect powder classifier. Background Technology

[0002] In the grinding process, in order to ensure that the particles reach a certain fineness and to avoid over-grinding of already crushed particles, an air classifier is used. The efficiency of the air classifier directly affects the grinding output. In the existing technology, the conventional air classifier is the dynamic air classifier, which has low efficiency.

[0003] Therefore, a dual-effect air classifier was designed based on the above technical problems. Utility Model Content

[0004] To address the problem of low powder classification efficiency in existing powder classifiers, this invention proposes a dual-effect powder classifier.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a double-effect air classifier, including a housing, through which an air outlet, a secondary air classifier air inlet, a discharge pipe and a primary air classifier air inlet are provided. The discharge pipe is located at the bottom of the housing. A rotor assembly is arranged sequentially inside the housing. The air outlet is located at the top of the housing and communicates with the rotor assembly. A primary airflow guide vane assembly and a secondary airflow guide vane assembly are arranged in parallel around the side of the rotor assembly from top to bottom. An airflow channel is provided inside the housing. The airflow channel communicates with the primary airflow guide vane assembly and the primary air classifier air inlet. A secondary airflow annular duct is provided between the outer ring of the secondary airflow guide vane assembly and the housing. The secondary air classifier air inlet communicates with the secondary airflow annular duct.

[0006] Preferably, the rotor assembly includes a rotor body, a rotating shaft is provided at the center of the rotor body, the rotating shaft passes through the housing and is connected to the motor, the rotor body is a cylindrical support, the two bottom surfaces of the rotor body are connected, and multiple fan blades are arranged in parallel on the side of the support, with gaps formed between the fan blades.

[0007] Working principle: The powder to be sorted is carried into the classifier by the primary airflow through the primary airflow inlet. Sorting takes place in the sorting space between the primary airflow guide vane assembly and the rotor assembly. The rotor is driven by a motor, creating a rotating airflow within the sorting space. Due to the airflow, when the powder enters the sorting space, the particles are subjected to gravity, wind force, and centrifugal force. Larger particles sink and are discharged through the outlet pipe, while smaller, finer particles are carried by the primary airflow into the rotor and collected through the outlet. The powder, after primary airflow sorting, continues to fall into the secondary airflow space formed by the secondary airflow guide vanes and rotor assembly, where it is sorted again by the secondary airflow. This two-stage sorting process increases the sorting probability of mixed powders in the sorting zone, thereby improving sorting efficiency.

[0008] Preferably, the rotor body is provided with a reinforcing rib in the middle position, the shaft is covered with a shaft shell, and the shaft shell is connected to the rotor body through a cross structure.

[0009] Preferably, the primary airflow guide vane assembly includes a mounting frame arranged around the rotor body, the mounting frame being parallel to the rotor body, and a plurality of blades being arranged parallel to each other on the mounting frame, the blades forming an angle of 45° to 60° with the fan blades, and a powder selection zone is formed between the primary airflow guide vane assembly and the rotor assembly.

[0010] Preferably, the secondary airflow guide vane assembly includes a mounting frame II arranged around the rotor body, the mounting frame II being parallel to the rotor body, and a plurality of blades II being arranged parallel to each other on the mounting frame II, the blades II forming an angle of 45° to 60° with the fan blades, and a powder selection zone II being formed between the secondary airflow guide vane assembly and the rotor assembly.

[0011] Preferably, the secondary airflow guide vane assembly has a material collection hopper at its lower part, the material collection hopper is inclined downward, and the discharge pipe is located at the bottom of the material collection hopper.

[0012] Preferably, the housing is provided with one or more secondary powder-selecting airflow inlets.

[0013] The advantages of this utility model are:

[0014] 1. This utility model uses two sets of airflow guide vanes, namely primary airflow guide vanes and secondary airflow guide vanes, to cooperate with the rotor assembly, thereby forming two powder selection processes. That is, after the primary powder selection airflow performs separation, a secondary separation is performed, thereby improving the powder selection effect.

[0015] 2. Since the rotor body of this utility model needs to be lengthened to accommodate two-stage powder selection, a reinforcing rib is set in the middle position, and the rotor body structure is made more stable by connecting through a cross structure.

[0016] 3. The secondary airflow guide vane of this utility model is provided with a collection hopper at the lower part. The collection hopper is inclined downward and the discharge pipe is provided at the bottom of the collection hopper to facilitate the collection of powder. Attached Figure Description

[0017] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the powder selection structure of the primary airflow guide vane assembly of this utility model;

[0020] Figure 3 This is a schematic diagram of the powder selection structure of the secondary airflow guide vane assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the rotor body of this utility model;

[0022] Figure 5 This is a top view of the rotor body of this utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the primary airflow guide vane assembly of this utility model;

[0024] Figure 7 This is a schematic cross-sectional view of the primary airflow guide vane assembly of this utility model;

[0025] Figure 8 This is a schematic diagram of the secondary airflow guide vane assembly of this utility model;

[0026] Figure 9 This is a schematic cross-sectional view of the secondary airflow guide vane assembly of this utility model.

[0027] In the diagram: 1. Shell; 2. Air outlet; 3. Secondary air classifier air inlet; 4. Discharge pipe; 5. Primary air classifier air inlet; 6. Rotor assembly; 7. Primary airflow guide vane assembly; 8. Secondary airflow guide vane assembly; 9. Airflow channel; 101. Collection hopper; 601. Rotor body; 602. Motor; 603. Fan blade; 604. Reinforcing rib; 605. Shaft housing; 701. Mounting frame; 702. Blade; 703. Air classifier zone one; 801. Mounting frame two; 802. Blade two; 803. Air classifier zone two; 804. Secondary airflow annular duct. Detailed Implementation

[0028] 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 protection scope of the present utility model.

[0029] Please see Figures 1-9 As shown, the technical solution adopted by this utility model to solve its technical problem is: a double-effect air classifier, including a housing 1, wherein the housing 1 is provided with an air outlet 2, a secondary air classifier air inlet 3, a discharge pipe 4 and a primary air classifier air inlet 5, the discharge pipe 4 is located at the bottom of the housing 1, and a rotor assembly 6 is arranged sequentially inside the housing 1. The air outlet 2 is located at the top of the housing 1 and communicates with the rotor assembly 6. A primary airflow guide vane assembly 7 and a secondary airflow guide vane assembly 8 are arranged in parallel around the side of the rotor assembly 6 from top to bottom. An airflow channel 9 is provided inside the housing 1, and the airflow channel 9 communicates with the primary airflow guide vane assembly 7 and the primary air classifier air inlet 5. A secondary airflow annular duct 804 is provided between the outer ring of the secondary airflow guide vane assembly 8 and the housing 1, and the secondary air classifier air inlet 3 communicates with the secondary airflow annular duct 804.

[0030] Furthermore, the rotor assembly 6 includes a rotor body 601, with a rotating shaft at the center of the rotor body 601. The rotating shaft passes through the housing 1 and is connected to the motor 602. The rotor body 601 is a cylindrical support, and the two bottom surfaces of the rotor body 601 are connected. Multiple fan blades 603 are arranged in parallel on the side of the support, and gaps are formed between the fan blades 603.

[0031] Furthermore, the primary airflow guide vane assembly 7 includes a mounting frame 701 arranged around the rotor body 601. The mounting frame 701 is parallel to the rotor body 601. A plurality of blades 702 are arranged parallel to each other on the mounting frame 701. The blades 702 form an angle of 45° to 60° with the fan blades 603. A powder selection zone 703 is formed between the primary airflow guide vane assembly 7 and the rotor assembly 6.

[0032] Furthermore, the secondary airflow guide vane assembly 8 includes a mounting frame 801 arranged around the rotor body 601. The mounting frame 801 is parallel to the rotor body 601, and a plurality of blades 802 are arranged parallel to each other on the mounting frame 801. The blades 802 form an angle of 45° to 60° with the fan blade 603. A powder selection zone 803 is formed between the secondary airflow guide vane assembly 8 and the rotor assembly 6. In the actual powder selection process, the secondary airflow guide vane assembly 8 and the primary airflow guide vane assembly 7 can be completely identical.

[0033] In another embodiment, a reinforcing rib 604 is provided around the middle position of the rotor body 601, and a shaft shell 605 is provided around the shaft. The shaft shell 605 is connected to the rotor body 601 through a cross structure, thereby making the structure of the rotor body 601 more stable.

[0034] In another embodiment, the secondary airflow guide vane assembly 8 is provided with a collection hopper 101 at its lower part. The collection hopper 101 is inclined downward and the discharge pipe 4 is located at the bottom of the collection hopper 101, which makes it more convenient to collect powder.

[0035] Working principle: The powder to be sorted is carried into the classifier by the primary airflow through the primary airflow inlet 5. Sorting takes place in the first sorting zone 703 between the primary airflow guide vane assembly 7 and the rotor assembly 6. Since the blades 702 and fan blades 603 in the primary airflow guide vane assembly 7 are arranged at 45-60°, and the rotor body 601 is driven by the motor 602, a rotating airflow is formed in the first sorting zone. Due to the airflow, when the powder enters the sorting zone, the powder particles are subjected to gravity, wind force, and centrifugal force. Larger particles sink and are discharged through the discharge pipe 4, while smaller, finer particles are carried by the primary airflow into the rotor and discharged through the outlet 2. After primary airflow sorting, the powder continues to fall into the second sorting zone 803 formed by the blades 802 and the rotor assembly 6, where it is sorted again by the secondary airflow. This results in a two-stage sorting process, increasing the sorting probability of mixed powders in the sorting zone and thus improving sorting efficiency.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A double-effect air classifier, comprising a housing (1), characterized in that, The housing (1) is provided with an air outlet (2), a secondary air classifier air inlet (3), a discharge pipe (4), and a primary air classifier air inlet (5). The discharge pipe (4) is located at the bottom of the housing (1). The housing (1) is provided with a rotor assembly (6) in sequence. The air outlet (2) is located at the top of the housing (1) and is connected to the rotor assembly (6). The rotor assembly (6) is provided with a primary airflow guide vane assembly (7) and a secondary airflow guide vane assembly (8) arranged in parallel around its side from top to bottom. The housing (1) is provided with an airflow channel (9). The airflow channel (9) is connected to the primary airflow guide vane assembly (7) and the primary air classifier air inlet (5). The secondary airflow guide vane assembly (8) is provided with a secondary airflow annular duct (804) between its outer ring and the housing (1). The secondary air classifier air inlet (3) is connected to the secondary airflow annular duct (804).

2. The dual-effect air classifier according to claim 1, characterized in that: The rotor assembly (6) includes a rotor body (601), a rotating shaft is provided at the center of the rotor body (601), the rotating shaft passes through the housing (1) and is connected to the motor (602), the rotor body (601) is a cylindrical support, the two bottom surfaces of the rotor body (601) are connected, and multiple fan blades (603) are arranged in parallel on the side of the support, and gaps are formed between the fan blades (603).

3. A dual-effect air classifier according to claim 2, characterized in that: The rotor body (601) is provided with a reinforcing rib (604) in the middle position, and the rotating shaft is covered with a rotating shaft shell (605). The rotating shaft shell (605) is connected to the rotor body (601) through a cross structure.

4. A double-effect air classifier according to claim 2, characterized in that: The primary airflow guide vane assembly (7) includes a mounting frame (701) arranged around the rotor body. The mounting frame (701) is arranged parallel to the rotor body (601). A plurality of blades (702) are arranged parallel to each other on the mounting frame (701). The blades (702) form an angle of 45 to 60° with the fan blades (603). A powder selection zone (703) is formed between the primary airflow guide vane assembly (7) and the rotor assembly (6).

5. A dual-effect air classifier according to claim 1, characterized in that: The secondary airflow guide vane assembly (8) includes a mounting frame two (801) arranged around the rotor body (601). The mounting frame two (801) is parallel to the rotor body (601). A plurality of blades two (802) are arranged parallel to each other on the mounting frame two (801). The blades two (802) form an angle of 45° to 60° with the fan blade (603). A powder selection zone two (803) is formed between the secondary airflow guide vane assembly (8) and the rotor assembly (6).

6. A double-effect air classifier according to claim 1, characterized in that: The secondary airflow guide vane assembly (8) is provided with a material collection hopper (101) at the bottom. The material collection hopper (101) is inclined downward and the discharge pipe (4) is provided at the bottom of the material collection hopper (101).

7. A double-effect air classifier according to claim 1, characterized in that: The housing (1) is provided with one or more secondary powder-selecting airflow inlets (3).

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