Powder material sieving device
By designing a combination of blowing downward blowing and spiral plate delivery in the powder material screening device, the problems of low powder screening efficiency and prone to clogging of the screen holes are solved, and efficient powder screening and screen hole cleaning are achieved.
Patent Information
- Application Number
- CN202421503129.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the prior art, the problem of low powder screening efficiency and prone to clogging of screen holes is especially directed to lightweight powder materials.
The design of blowing downwards near the circumferential wall of the screen box is adopted. The airflow is used to carry powder particles through the screen hole, and at the same time, the screen holes and materials are cleaned through the cooperation of the spiral plate and the screw hoist.
It improves the powder screening efficiency, reduces the probability of screening holes, and ensures the continuity and efficiency of the screening process.
Smart Images
Figure CN223171332U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screening devices, in particular to a powder material screening device. Background Art
[0002] Powder screening is a common industrial operation used to classify powder materials by particle size. Traditional screening devices generally use vibration for screening. However, for lightweight powders with relatively low density, the powder tends to float upwards and fall slowly during the vibration screening process, resulting in low overall screening efficiency and easy clogging of the sieve holes. Utility Model Content
[0003] The utility model aims to solve the shortcomings of low powder screening efficiency and easy clogging of screen holes in the prior art, and proposes a powder material screening device.
[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0005] A powder material screening device comprises a frame, on which a screening box with a vertical axis is fixedly installed, the screening box has a cylindrical chamber and is provided with sieve holes around it, a cylinder is coaxially installed above the screening box, and the cylinder is connected to a storage hopper above the cylinder, the frame is rotatably connected to a support pipe coaxially arranged with the screening box, the support pipe is connected to an air pump and is transmission-connected to a rotating motor, one end of the support pipe placed inside the screening box is connected to an air blowing pipe, the air outlet of the air blowing pipe is close to the inner circumferential wall of the screening box, and blows air downward.
[0006] The screening device comprises a spiral plate, which is fixed coaxially with the support tube. Part of the spiral plate is placed in the storage hopper and part of the spiral plate is placed in the cylinder.
[0007] The top end of the support tube is rotatably connected to an air supply pipe, and the air supply pipe is connected to an air outlet end of the air pump.
[0008] The screening device includes an outer box body, which is sealed and installed outside the screening box. A material drop cavity is provided between the inner wall of the outer box body and the outer wall of the screening box. A fine powder discharge outlet is provided at the bottom of the outer box body, and a breathable cloth bag can be detachably installed at the fine powder discharge outlet.
[0009] The bottom of the screening box is provided with a miscellaneous powder discharge outlet, and the screening box is fixedly connected to the miscellaneous powder discharge outlet with an extension pipe, and the extension pipe extends to the outside of the outer box body.
[0010] The screening device includes a screw elevator, the outlet end of the extension pipe extends to the screw elevator loading box, and the discharge end of the screw elevator extends to the storage hopper.
[0011] The extension pipe is installed with a switch valve at a position outside the outer box body.
[0012] The outer box body includes an upper conical cylinder part and a lower conical cylinder part, and the sieve holes on the outer circumferential wall of the screening box are opposite to the upper conical cylinder part.
[0013] A powder material sieving device proposed by the present utility model has the beneficial effects that: in this device, since the air outlet of the air blowing pipe is close to the inner circumferential wall of the screening box and blows air downward, when the downward moving air flow passes through the inner circumferential position of the screening box, the materials attached to the inner circumferential wall of the screening box are dispersed. When the air blowing pipe rotates with the support pipe, the air blowing pipe will rotate in a circle, thereby realizing the cleaning work of the sieve holes on the entire inner circumferential wall of the screening box, reducing the probability of sieve hole blockage, and at the same time, using the air flow to enable the powder to pass through the sieve holes faster, improving the sieving efficiency. Description of the Drawings
[0014] Figure 1 It is a structural schematic diagram of the present utility model.
[0015] In the figure: screw elevator 1, air supply pipe 2, rotating motor 3, storage hopper 4, support pipe 5, spiral plate 6, air blowing pipe 7, cylinder 8, screening box 9, outer box body 10, fine powder discharge port 11, breathable cloth bag 12, miscellaneous powder discharge port 13, extension pipe 14, blanking cavity 15, upper conical cylinder part 101, lower conical cylinder part 102. Detailed Embodiment
[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0017] Refer to Figure 1 , a powder material sieving device, including a frame. The frame is fixedly installed with a screening box 9 with a vertically arranged axis. The screening box 9 has a cylindrical chamber and is provided with sieve holes around it. A cylinder 8 is coaxially connected and installed above the screening box 9. A storage hopper 4 is connected and communicated above the cylinder 8. The frame is rotatably connected with a support pipe 5 arranged coaxially with the screening box 9. The support pipe 5 is communicated with an air pump and is drivingly connected to a rotating motor 3. One end of the support pipe 5 placed inside the screening box 9 is communicated and installed with an air blowing pipe 7. The air outlet of the air blowing pipe 7 is close to the inner circumferential wall of the screening box 9 and blows air downward.
[0018] When this device works, the powder to be sieved is placed in the storage hopper 4. The powder falls into the screening box 9 through the cylinder 8. At the same time, the rotating motor 3 drives the support pipe 5 to rotate, and the air pump sends air into the support pipe 5. The air flow blows into the screening box 9 through the air blowing pipe 7. Under the blowing action, the air flow carries the powder with smaller particles through the sieve holes, and the powder with larger particles remains in the screening box 9, realizing the sieving action. Refer toFigure 1 Since the air outlet of the air blowing pipe 7 is close to the inner circumferential wall of the screening box 9 and blows air downward, the downward-moving airflow blows away the material attached to the inner circumferential wall of the screening box 9 when passing through the inner circumferential position of the screening box 9. When the air blowing pipe 7 rotates with the support pipe 5, the air blowing pipe 7 will rotate in a circle, thereby cleaning the sieve holes on the entire inner circumferential wall of the screening box 9, reducing the probability of sieve hole blockage, and at the same time utilizing the airflow to make the powder pass through the sieve holes faster, thereby improving screening efficiency.
[0019] When the device is working, a certain amount of material should be stored in the storage hopper 4 to avoid upward backflow of airflow.
[0020] refer to Figure 1 The screening device includes a spiral plate 6, which is fixed coaxially with the support tube 5. Part of the spiral plate 6 is placed in the storage hopper 4 and part of it is placed in the cylinder 8. When the rotating motor 3 drives the support tube 5 to rotate, the spiral plate 6 rotates with the support tube 5, and the powder inside the storage hopper 4 is transported to the inside of the screening box 9 through the spiral plate 6.
[0021] As a way of connecting to the air pump, the top end of the support tube 5 is rotatably connected to the air supply pipe 2, and the air supply pipe 2 is connected to the air outlet end of the air pump.
[0022] The screening device includes an outer box body 10, which is sealed and installed on the outside of the screening box 9. A blanking cavity 15 is provided between the inner wall of the outer box body 10 and the outer wall of the screening box 9. A fine powder discharge port 11 is provided at the bottom of the outer box body 10. A breathable cloth bag 12 can be detachably installed at the fine powder discharge port 11. The airflow drives the fine powder to pass through the sieve holes. Under the blocking effect of the outer box body 10, the fine powder finally gathers inside the breathable cloth bag 12.
[0023] As an embodiment, a miscellaneous powder discharge outlet 13 is provided at the bottom of the screening box 9. An extension pipe 14 is fixedly connected to the miscellaneous powder discharge outlet 13 of the screening box 9. The extension pipe 14 extends to the outside of the outer box body 10, and some fine powder and coarse powder are discharged to the outside through the extension pipe 14.
[0024] Furthermore, the screening device includes a screw elevator 1, the outlet end of the extension tube 14 extends to the loading box of the screw elevator 1, and the discharge end of the screw elevator 1 extends to the storage hopper 4. The powder to be screened is transported to the storage hopper 4 through the screw elevator 1, and part of the fine powder and coarse powder discharged by the extension tube 14 enters the storage hopper 4 again for repeated screening.
[0025] Preferably, the extension tube 14 is provided with an on-off valve at an external position of the outer box body 10 , and the on-off valve is opened once every period of time, so as to avoid excessive fine powder being discharged through the extension tube 14 as much as possible.
[0026] The outer box body 10 includes an upper conical cylinder part 101 and a lower conical cylinder part 102. The sieve holes on the outer circumferential wall of the screening box 9 are opposite to the upper conical cylinder part 101. The outer box body 10 is set as a conical structure. When the airflow carrying fine powder impacts the upper conical cylinder part 101, it can rebound downward better, reducing the probability of the airflow rebounding to the outer wall of the screening box 9 and promoting discharging.
[0027] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, through equivalent replacement or change, the obtained technical solutions, concepts and designs should all be covered within the protection scope of the present utility model.
Claims
1. A sieving device for powder materials, comprising a frame, characterized in that, The frame is fixedly installed with a screening box (9) whose axis is vertically arranged. The screening box (9) has a cylindrical chamber and is provided with screening holes around it. Above the screening box (9), a cylinder (8) is coaxially connected and installed. Above the cylinder (8), a storage hopper (4) is connected. The frame is rotatably connected with a support pipe (5) arranged coaxially with the screening box (9). The support pipe (5) is connected to an air pump and is drivingly connected to a rotating motor (3). One end of the support pipe (5) placed inside the screening box (9) is connected and installed with a blowing pipe (7). The air outlet of the blowing pipe (7) is close to the inner circumferential wall of the screening box (9) and blows air downward. The sieving device includes a spiral plate (6). The spiral plate (6) is fixedly coaxially arranged with the support pipe (5). The spiral plate (6) is partially placed inside the storage hopper (4) and partially placed inside the cylinder (8). The sieving device includes an outer box body (10). The outer box body (10) is sealed and installed outside the screening box (9). There is a material falling cavity (15) between the inner wall of the outer box body (10) and the outer wall of the screening box (9). The bottom of the outer box body (10) has a fine powder discharge port (11). The fine powder discharge port (11) is detachably installed with a breathable cloth bag (12). The bottom of the screening box (9) is provided with a miscellaneous powder discharge port (13). The screening box (9) is fixedly connected with an extension pipe (14) at the miscellaneous powder discharge port (13). The extension pipe (14) extends to the outside of the outer box body (10). The outer box body (10) includes an upper conical cylinder part (101) and a lower conical cylinder part (102). The screening holes on the outer circumferential wall of the screening box (9) are opposite to the upper conical cylinder part (101).
2. The sieving device for powder materials according to claim 1, characterized in that, The top end of the support pipe (5) is rotatably connected with a delivery pipe (2). The delivery pipe (2) is connected to the air outlet end of the air pump.
3. The sieving device for powder materials according to claim 1, characterized in that, The sieving device includes a screw elevator (1). The outlet end of the extension pipe (14) extends to the feeding box of the screw elevator (1). The discharging end of the screw elevator (1) extends to the storage hopper (4).
4. A powder material sieving device according to claim 1, wherein, A switch valve is installed at the position of the extension pipe (14) outside the outer box body (10).