An air flow screening device

Abstract

The utility model discloses an airflow screening device, including base, the circular ring body of setting at the top of base, the bottom of circular ring body is provided with the bottom plate, and the top detachably is provided with the upper cover, be provided with the feed inlet on the upper cover, be provided with the screen cloth that can rotate axially to it in the circular ring body, just the screen cloth will the circular ring body divide into upper cavity and lower cavity, the side wall of lower cavity is provided with first discharge gate, and the side wall of upper cavity is provided with second discharge gate, be provided with the drive arrangement in the base, and the output shaft of drive arrangement passes bottom plate, with screen cloth connects, the side wall of lower cavity still is provided with at least one air pipe that extends to the output shaft department, and the top of air pipe is provided with a plurality of gas holes, through the rotation screen cloth, utilize centrifugal force to screen the material above screen cloth constantly, utilize the air pipe that sets up below screen cloth to produce the airflow to screen cloth simultaneously, blow to screen cloth, avoid screen cloth to be blocked.

Description

Technical Field

[0001] This utility model relates to an airflow screening device, belonging to the technical field of material sorting equipment. Background Technology

[0002] An airflow screening device is a device that separates materials of different particle sizes using a screen. Existing airflow screening devices typically work by having the material to be screened flow into the screen and then using a vibration generator to drive the entire device to vibrate. During the vibration process, the material on the screen is continuously screened, thereby achieving the separation of materials of different particle sizes.

[0003] While vibrating screens can effectively screen materials and prevent large particles from clogging the screen to some extent, this method causes large particles to remain on the screen surface for a longer time. They can only slowly move to the edge and be discharged through continuous vibration, which will affect the screening efficiency to some extent. In addition, equipment that uses vibration to screen will generate a lot of noise in the workshop, affecting the working environment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an airflow screening device. By rotating the screen, centrifugal force is used to continuously screen the material above the screen. At the same time, larger particles will also move quickly to the edge for discharge under the action of centrifugal force. Meanwhile, the air pipe set below the screen generates an upward airflow to blow air onto the screen and prevent the screen from being blocked.

[0005] To achieve the above objectives, this utility model employs the following technical solution: An airflow screening device includes a base and an annular body disposed above the base. The bottom of the annular body is provided with a bottom plate and the top is detachably provided with a top cover. The top cover is provided with a feed inlet. The annular body is provided with a screen that can rotate relative to its axial direction, and the screen divides the annular body into an upper cavity and a lower cavity. The side wall of the lower cavity is provided with a first discharge port, and the side wall of the upper cavity is provided with a second discharge port. A drive device is installed inside the base, and the output shaft of the drive device passes through the base plate and is connected to the screen. The lower cavity is also provided with at least one air pipe extending to the output shaft on its side wall, and the top of the air pipe is provided with multiple air outlets.

[0006] The aforementioned airflow sieving device is characterized in that: at least one scraper that can rotate along the upper surface of the base plate is connected to the output shaft.

[0007] The aforementioned airflow screening device is characterized in that: the base plate has a conical structure, and the hanging strip has an arc structure and is made of flexible material.

[0008] The aforementioned airflow sieving device is characterized in that: two air pipes are symmetrically arranged on the side wall of the lower cavity, and an air passage adapter is provided at the connection between the air pipes and the side wall of the lower cavity.

[0009] The aforementioned airflow sieving device is characterized in that: four air pipes are equally spaced along the circumference of the side wall of the lower cavity, and an air passage adapter is provided at the connection between the air pipes and the side wall of the lower cavity.

[0010] The aforementioned airflow screening device is characterized in that: a pulverizer is provided at the second discharge port, a cyclone separator is provided at the feed port, and the discharge port of the pulverizer is connected to the feed port of the cyclone separator.

[0011] The aforementioned airflow screening device is characterized in that: a screw quantitative feeding device is further provided between the second discharge port and the crusher.

[0012] Compared with the prior art, the airflow screening device provided by this utility model continuously screens the material above the screen by rotating the screen and using centrifugal force. At the same time, larger particles of material will also move quickly to the edge for discharge under the action of centrifugal force. Meanwhile, the air pipe set below the screen generates an upward airflow to blow air onto the screen and prevent the screen from being blocked. By setting a conical base plate at the bottom of the annular body and setting an arc-shaped flexible scraper, the screened material is gradually pushed to the first discharge port, which facilitates the rapid and automatic collection of the screened material that meets the requirements. Attached Figure Description

[0013] Figure 1 This is a front view of an airflow sieving device according to the present invention; Figure 2 This is a top view of an airflow sieving device according to the present invention; Figure 3 yes Figure 2 BB section view in the middle; Figure 4 This is a top view of the concealed top cover and screen of an airflow sieving device according to this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0017] This embodiment provides an airflow sieving device, including a base 30 and an annular body 10 disposed above the base. The bottom of the annular body 10 is provided with a bottom plate 11, and the top is detachably provided with a top cover 20. The top cover 20 is provided with a feed inlet 21. A screen 40 that can rotate relative to its axial direction is provided inside the annular body 10, and the screen 40 divides the annular body 10 into an upper cavity and a lower cavity. The side wall of the lower cavity is provided with a first discharge port 12, and the side wall of the upper cavity is provided with a second discharge port 13. A drive device 60 is provided inside the base 30, and the output shaft of the drive device 60 passes through the bottom plate 11 and is connected to the screen 40. The side wall of the lower cavity is also provided with at least one air pipe 50 extending to the output shaft, and the top of the air pipe 50 is provided with multiple air outlets.

[0018] The material to be sorted enters through the feed inlet 21 at the center of the upper cover 20 and falls onto the screen 40. The screen 40 rotates in a certain direction under the drive of the drive device 60. During the rotation of the screen, the material gradually moves towards the edge under the action of centrifugal force. During the movement, the material that meets the particle size requirements falls from the screen into the lower cavity. When the larger particles move to the edge of the ring 10 and reach the second discharge port 13, they are discharged from the second discharge port 13 for subsequent processing.

[0019] In this embodiment, at least one air pipe 50 is provided at the bottom of the screen, extending from the side wall of the lower cavity to the center of the annular body 10. After the air pipe 50 is connected to an external source, air can be blown through its upward-opening air outlet. During the rotation of the screen, air is blown into the mesh of the screen to blow back the particles stuck in the mesh, thus preventing them from clogging the mesh.

[0020] It should be noted that in this embodiment, since the material to be sorted is already fine particles after crushing, and the distance between the air pipe 50 and the screen 40 is small, only a small air volume and air speed are needed to satisfy the back-blowing of the mesh particles, so as to avoid clogging the screen mesh. This air volume will not have a substantial impact on the filtration of the screen or the feeding of the feed inlet 21.

[0021] Furthermore, in this embodiment, the outer circumferential surface of the screen is almost in contact with the inner wall of the annular body 10, preventing unscreened particles from passing through the gap between them and entering the lower cavity. In actual implementation, if a higher sealing level is required at this point, this effect can also be achieved by setting appropriate sealing measures at the connection between the two. For example, the annular body 10 can be configured as two detachable rings, with airtight rings at the bottom of the upper ring and the top of the lower ring. The screen 40 is placed between the two airtight rings. During the rotation of the screen 40, the airtight rings provide an airtight seal, ensuring that material does not enter the lower cavity from the connection between the two. The airtight rings are conventional prior art, and this embodiment does not provide corresponding descriptions or illustrations in the specification or accompanying drawings.

[0022] To ensure rapid discharge of the sorted material from the lower cavity, in this embodiment, at least one scraper 60 rotatable along the upper surface of the base plate 11 is connected to the output shaft. The base plate 11 has a conical structure, and the scraper is an arc-shaped structure made of flexible material. The conical base plate 11 combined with the arc-shaped, flexible scraper 60 allows for rapid material discharge. For even faster discharge, three scrapers 60 can be evenly spaced on the output shaft.

[0023] Two air pipes 50 are symmetrically arranged on the side wall of the lower cavity. An air passage adapter is provided at the connection point between the air pipes 50 and the side wall of the lower cavity. By using two symmetrical air pipes 50, compared to a single air pipe structure, material stuck in the screen mesh can be backflushed more quickly and effectively, improving screening efficiency. Alternatively, four air pipes 50 can be evenly spaced along the circumference of the side wall of the lower cavity, depending on actual needs. Example 2

[0024] This embodiment provides an airflow screening device. A pulverizer is installed at the second discharge port 13, and a cyclone separator is installed at the feed port 21. The discharge port of the pulverizer is connected to the feed port of the cyclone separator. A screw metering feeder is also installed between the second discharge port 13 and the pulverizer. By installing the screw metering feeder, pulverizer, and cyclone separator between the second discharge port 13 and the feed port 21, the large particles screened out can be pulverized and screened again, thus forming a closed-loop processing procedure.

[0025] In summary, the airflow screening device provided by this utility model continuously screens the material above the screen by rotating the screen and using centrifugal force. At the same time, larger particles of material will also move quickly to the edge for discharge under the action of centrifugal force. Meanwhile, the air pipe set below the screen generates an upward airflow to blow air onto the screen and prevent the screen from being blocked.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An air flow screening device characterized by: Includes a base (30) and an annular body (10) disposed above the base. The bottom of the annular body (10) is provided with a bottom plate (11) and the top is detachably provided with a top cover (20). The top cover (20) is provided with a feed port (21). The annular body (10) is provided with a screen (40) that can rotate relative to its axial direction, and the screen (40) divides the annular body (10) into an upper cavity and a lower cavity. The side wall of the lower cavity is provided with a first discharge port (12), and the side wall of the upper cavity is provided with a second discharge port (13). A drive device (60) is provided inside the base (30), and the output shaft of the drive device (60) passes through the base plate (11) and is connected to the screen (40); The lower cavity is also provided with at least one air pipe (50) extending to the output shaft on its side wall, and the top of the air pipe (50) is provided with multiple air outlets.

2. An air current screening device according to claim 1, characterized in that: At least one scraper (60) is connected to the output shaft and can rotate along the upper surface of the base plate (11).

3. An air flow sizing device according to claim 2, wherein: The base plate (11) has a conical structure, and the hanging strip has an arc-shaped structure and is made of flexible material.

4. An air current screening device according to claim 1, characterized in that: Two air tubes (50) are symmetrically arranged on the side wall of the lower cavity, and an air passage adapter is provided at the connection between the air tubes (50) and the side wall of the lower cavity.

5. An air current screening device according to claim 1, characterized in that: The lower cavity has four air tubes (50) evenly spaced along its circumference on its side wall, and an air passage adapter is provided at the connection between the air tubes (50) and the side wall of the lower cavity.

6. An air current screening device according to claim 5, characterised in that: A pulverizer is provided at the second discharge port (13), and a cyclone separator is provided at the feed port (21). The discharge port of the pulverizer is connected to the feed port of the cyclone separator.

7. An air current screening device according to claim 6, characterised in that: A screw metering feeder is also provided between the second discharge port (13) and the crusher.

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