Powder screening device

Abstract

The utility model relates to a powder screening device which comprises a motor, a screening tray, a screening frame and a machine frame, the motor is installed on the machine frame, the output end of the motor is connected with the center of the lower end of the screening tray, the screening frame is installed at the upper end of the machine frame and is in a vertically-through hollow cylinder shape, and the diameter of the screening tray is equal to that of the screening frame. A discharging opening is formed in the side face of the screening frame, and a baffle is arranged at one end of the discharging opening and extends into the inner side of the discharging opening. Screening of powder and large-particle matter is achieved through forward and reverse rotation of the screening tray. When rotating clockwise along with the sieve tray, the to-be-screened materials can impact the baffle and are prevented from falling out of the discharge port, large-particle substances in the to-be-screened materials are left on the sieve tray, and when the sieve tray rotates anticlockwise, the large-particle substances rotate along with the sieve tray, run to the discharge port along the inner wall of the sieve frame and are discharged under the assistance of the baffle.

Description

Technical Field

[0001] The utility model relates to the technical field of powder screening, in particular to a powder screening device. Background Art

[0002] At present, the screening machines used by powder metallurgy enterprises mainly include swing screening machines, rotary vibration screening machines, ultrasonic screening machines, etc., and there are many obvious disadvantages in the existing screen frames for grading screening. For example, when the material layer on the screen is too thick, the material will be discharged from the discharge port before it touches the screen. In order to improve the one-time screening rate, it is necessary to maintain a longer screening time, which leads to low screening efficiency, thus affecting the metallurgical processing efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a powder screening device, which can screen powder and large particles through the forward and reverse rotation of the sieve plate, thereby improving the screening efficiency.

[0004] The technical solution of the utility model is: a powder screening device, comprising a motor, a sieve plate, a screening frame and a frame, the motor is installed on the frame, the output end of the motor is connected to the center of the lower end of the sieve plate, the screening frame is installed on the upper end of the frame, the screening frame is a hollow cylindrical shape that passes through from top to bottom, the diameter of the sieve plate is equal to the diameter of the screening frame, there is a gap between the lower end surface of the screening frame and the upper end surface of the sieve plate, a discharge port is provided on the side of the screening frame, a baffle is provided at one end of the discharge port, and the baffle extends into the inner side of the discharge port.

[0005] Furthermore, an annular isolation plate is provided on the inner side of the screening frame, and the annular isolation plate is located above the discharge port.

[0006] Furthermore, the upper end of the annular isolation plate is an arc surface.

[0007] Furthermore, a material guiding structure is provided outside the discharge port, and the material guiding structure opens downward.

[0008] Furthermore, an arc track is provided in the material guiding structure, and the arc track is arranged between the upper end of the discharge port and the lower end of the material guiding structure.

[0009] Furthermore, an air inlet channel is provided at the front end of the material guiding structure, an air blow is provided in the air inlet channel, and an outlet of the air inlet channel is located on the arc-shaped runway.

[0010] Furthermore, a vibrator is provided on the frame.

[0011] Compared with the prior art, the utility model has the advantages that: the screening of powder and large particles is achieved through the forward and reverse rotation of the sieve plate, thereby improving the screening efficiency; when the material to be screened follows the sieve plate to rotate clockwise, it will hit the baffle to avoid falling out of the discharge port, while the large particles in the material to be screened will remain on the sieve plate, and when the sieve plate rotates counterclockwise, the large particles follow the sieve plate to rotate, run along the inner wall of the screening frame to the discharge port, and are discharged with the assistance of the baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the screening frame of the utility model;

[0015] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0016] Figure 4 This is a schematic diagram of the structure of the utility model after the screening frame and the sieve plate are combined;

[0017] Figure 5 It is a cross-sectional view of the material guiding structure of the utility model.

[0018] Among them: 1. frame; 2. motor; 3. sieve plate; 4. screening frame; 401. annular isolation plate; 402. arc surface; 403. discharge port; 5. vibrator; 6. powder collection box; 7. impurity collection box; 8. material guide structure; 801. air inlet channel; 802. arc runway; 9. baffle; 10. air blowing. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] like Figure 1-5As shown, a powder screening device comprises a motor 2, a sieve plate 3, a screening frame 4 and a frame 1, wherein the motor 2 is mounted on the frame 1, and the output end of the motor 2 is connected to the center of the lower end of the sieve plate 3, and the motor 2 drives the sieve plate 3 to rotate by forward and reverse rotation, and the screening frame 4 is mounted on the upper end of the frame 1, and the screening frame 4 is a hollow cylindrical shape that runs through the upper and lower parts, and the diameter of the sieve plate 3 is equal to the diameter of the screening frame 4 to prevent the material to be screened from falling out when not screened, and there is a gap between the lower end surface of the screening frame 4 and the upper end surface of the sieve plate 3 to ensure that the sieve plate 3 can rotate freely, and a discharge port 403 is provided on the side of the screening frame 4 for discharging large particles remaining after the material is screened, and a baffle 9 is provided at one end of the discharge port 403, and the baffle 9 extends into the inner side of the discharge port 403 to provide a shield for the discharge port 403 when screening to prevent the material to be screened from falling out, and to provide retention and guidance for large particles when discharging.

[0021] In the above embodiment, an annular isolation plate 401 is provided on the inner side of the screening frame 4, and the annular isolation plate 401 is located above the discharge port 403 to prevent the material from rising along the inner wall of the screening frame 4 or being thrown out of the screening frame 4 during screening, resulting in excessive dust and the like; the upper end of the annular isolation plate 401 is an arc surface 402, which provides guidance when the material is loaded into the sieve plate 3 to prevent the material from accumulating on the annular isolation plate 401; a material guide structure 8 is provided on the outer side of the discharge port 403, and the material guide structure 8 opens downward to intercept and transport the discharged large particles downward for easy collection; an arc runway 802 is provided inside the material guide structure 8, and the arc runway 80 2 is arranged between the upper end of the discharge port 403 and the lower end of the guide structure 8. When guiding the material, the large particles are transported downward along the arc runway 802, which avoids the large particles from colliding with the guide structure 8 and causing irregular movement, which causes inconvenience to the collection of the large particles; the front end of the guide structure 8 is provided with an air intake channel 801, and the air intake channel 801 is provided with an air blower 10. The outlet of the air intake channel 801 is located on the arc runway 802. When discharging, the large particles on the arc runway 802 are blown to assist in transporting them downward; the frame 1 is provided with a vibrator 5, which is started when the motor 2 is screening the material, and assists in the rapid screening of the powder, thereby improving the screening efficiency.

[0022] Description of the working method of this utility model:

[0023] A collecting box is respectively arranged below the sieve plate 3 and the guide structure 8, and the material to be screened is guided to the top of the sieve plate 3 through the pipeline, the motor 2 is started and drives the sieve plate 3 to rotate clockwise, and the vibrator 5 is started at the same time to rotate and vibrate the material to be screened. When the material to be screened rotates with the sieve plate 3, it will hit the baffle 9 to avoid falling out from the discharge port 403, and the powder in the material to be screened passes through the sieve plate 3 into the powder collecting box 6 below, while the large particles in the material to be screened remain on the sieve plate 3; after a period of screening, the supply of the material to be screened is stopped, and the powder is screened, and then the motor 2 is reversed, that is, the sieve plate 3 is driven to rotate counterclockwise. At this time, the large particles follow the sieve plate 3 to rotate, run along the inner wall of the screening frame 4 to the discharge port 403, and are discharged with the assistance of the baffle 9, while the large particles move downward along the arc runway 802 in the guide structure 8, and are assisted by the action of the air blow 10 to enter the impurity collection box 7 below the guide structure 8.

[0024] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A powder screening device, characterized in that: It includes a motor, a sieve plate, a screening frame and a frame, wherein the motor is installed on the frame, the output end of the motor is connected to the center of the lower end of the sieve plate, the screening frame is installed on the upper end of the frame, the screening frame is a hollow cylindrical shape penetrating from top to bottom, the diameter of the sieve plate is equal to the diameter of the screening frame, there is a gap between the lower end surface of the screening frame and the upper end surface of the sieve plate, a discharge port is provided on the side of the screening frame, a baffle is provided at one end of the discharge port, and the baffle extends into the inner side of the discharge port.

2. The powder screening device according to claim 1, characterized in that: An annular isolation plate is provided inside the screening frame, and the annular isolation plate is located above the discharge port.

3. The powder screening device according to claim 2, characterized in that: The upper end of the annular isolation plate is an arc surface.

4. The powder screening device according to claim 1, characterized in that: A material guiding structure is arranged outside the material discharge port, and the opening of the material guiding structure is downward.

5. The powder screening device according to claim 4, characterized in that: An arc track is arranged in the material guiding structure, and the arc track is arranged between the upper end of the material discharge port and the lower end of the material guiding structure.

6. The powder screening device according to claim 5, characterized in that: An air inlet channel is arranged at the front end of the material guiding structure, an air blow is arranged in the air inlet channel, and an outlet of the air inlet channel is located on the arc-shaped runway.

7. The powder screening device according to claim 1, characterized in that: A vibrator is arranged on the frame.

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