Multi-stage screening device

Abstract

The utility model discloses a multistage screening device which comprises a screening bin, raw materials are screened through the interior of the screening bin, the raw materials are conveyed through a communicating pipe, and the raw materials with different thicknesses can be screened and stored through a screen with screen holes sequentially becoming smaller from top to bottom. Raw materials remaining on the screen mesh can be conveniently discharged through the discharging opening, the material pushing plate can be driven by the motor and the driving shaft to push the raw materials on the screen mesh, so that screening of the raw materials is accelerated, the interior of the bin body can be conveniently opened through the bin body and the bin cover which are detachable, then the interior of the bin body is cleaned, and the raw materials can be conveniently guided and discharged through the material guiding groove. The screen mesh can be effectively prevented from being blocked through the bristles, and any number of screening bins can be combined according to screening requirements through the detachable communicating pipes.

Description

A multi-stage screening device Technical Field

[0001] This utility model relates to the field of screening device technology, specifically a multi-stage screening device. Background Technology

[0002] Paint. Paint is a chemical mixture that can firmly cover the surface of an object, serving protective, decorative, marking, and other special purposes. The authoritative Chinese book on coatings, *Coating Technology*, defines it as follows: "Coating is a material that can be applied to the surface of an object using different application techniques to form a firmly adhering, continuous solid film with a certain strength. This film is commonly referred to as a coating film, also known as a paint film or coating layer."

[0003] In paint production, particulate raw materials are mixed with liquid solvents. To ensure effective dissolution of the particulate raw materials, they are pre-screened. Qualified particulate raw materials of appropriate coarseness are used, while unqualified ones are reprocessed or used for other purposes. However, current screening devices cannot easily change the number of screening layers, which can lead to imprecise screening. Therefore, a multi-stage screening device is needed to solve the above problems. Summary of the Invention

[0004] In view of the problems existing in the prior art, this utility model discloses a multi-stage screening device. The technical solution adopted is as follows: It includes screening chambers, each with a cylindrical upper section and an inverted conical lower section, and the interior of the screening chamber is hollow. Several screening chambers are connected by connecting pipes. Each screening chamber has a discharge port on its side that can be closed by a pull-out cover. The uppermost screening chamber has a feed inlet on its upper surface. Screens are installed inside each screening chamber, located below the discharge ports, and the diameter of the screen openings decreases from top to bottom. The connecting pipes are simultaneously located above the uppermost screening chamber and at the lower end of the lowermost screening chamber. A motor mounting plate is located at the upper end of the uppermost connecting pipe. A motor is mounted above the motor mounting plate. The output shaft of the motor is vertically connected to a drive shaft. The drive shaft passes through all screening chambers via a connecting pipe, and there is space between the drive shaft and the connecting pipe. The drive shaft moves through the center of the screen. A pusher plate is mounted on the drive shaft. The pusher plate is located on each screen, and the lower surface of the pusher plate contacts the screen. The raw materials are screened through the interior of the screening chambers and transported through the connecting pipes. The screens with progressively smaller holes from top to bottom can screen and retain raw materials of different sizes. The material retained on the screen is easily discharged through the discharge port. The motor and drive shaft can drive the pusher plate to push the raw materials on the screen, thereby accelerating the screening of the raw materials.

[0005] As a preferred technical solution of the multi-stage screening device of this utility model, the screening chamber includes a chamber body and a chamber cover. The chamber body has an open structure at the top. The chamber cover is bolted to the top of the chamber body and closes the upper opening of the chamber body. The detachable chamber body and chamber cover make it easy to open the inside of the chamber body for cleaning.

[0006] As a preferred technical solution of the multi-stage screening device of this utility model, a guide trough is provided on the outside of the discharge port, which facilitates the guidance and discharge of raw materials.

[0007] As a preferred technical solution of the multi-stage screening device of this utility model, the lower surface and outer side of the pusher plate are provided with bristles, and the bristles are in contact with the upper surface of the screen and the inner side of the screening chamber. The bristles can effectively prevent the screen from clogging.

[0008] As a preferred technical solution of the multi-stage screening device of this utility model, the upper end of the connecting pipe is connected to the lower end of the bin body, and the lower end of the connecting pipe is connected to the upper surface of the lower bin cover by bolts. Through the detachable connecting pipe, any number of screening bins can be combined according to screening needs.

[0009] As a preferred technical solution of the multi-stage screening device of this utility model, both the bin body and the bin cover are made of stainless steel.

[0010] The beneficial effects of this utility model are as follows: This utility model screens raw materials through the interior of the screening chamber, and transports the raw materials through a connecting pipe. The screen mesh with progressively smaller holes from top to bottom can screen and retain raw materials of different coarseness. The discharge port facilitates the discharge of the raw materials retained on the screen. The motor and drive shaft can drive the pusher plate to push the raw materials on the screen, thereby accelerating the screening process. The detachable chamber body and cover make it easy to open the interior of the chamber for cleaning. The guide chute facilitates the guidance and discharge of raw materials. The brush effectively prevents the screen from clogging. The detachable connecting pipe allows for the combination of any number of screening chambers according to screening needs. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of this utility model;

[0012] Figure 2 is a cross-sectional view of this utility model;

[0013] Figure 3 is a schematic diagram of the screening chamber structure of this utility model;

[0014] Figure 4 is a schematic diagram of the drive shaft structure of this utility model;

[0015] Figure 5 is an enlarged structural schematic diagram of point A of this utility model.

[0016] In the diagram: 1-screening bin, 11-bin body, 12-bin cover, 101-feed inlet, 102-screen, 103-discharge outlet, 2-connecting pipe, 201-motor mounting plate, 3-motor, 301-drive shaft, 302-push plate, 303-brush bristles. Detailed Implementation

[0017] Example 1: As shown in Figures 1 to 5, this utility model discloses a multi-stage screening device. The technical solution includes a screening chamber 1, which is a cylindrical structure with an inverted conical shape at the bottom and a hollow interior. Several screening chambers 1 are connected by a connecting pipe 2. A discharge port 103, which can be closed by a pull-out cover, is provided on the side of each screening chamber 1. An inlet 101 is provided on the upper surface of the uppermost screening chamber 1. Screens 102 are installed inside each screening chamber 1, located below the discharge port 103. The diameter of the screen holes of the screens 102 decreases from top to bottom. 1. It includes a bin body 11 and a bin cover 12. The bin body 11 has an open top structure. The bin cover 12 is bolted to the top of the bin body 11 and closes the upper opening of the bin body 11. The detachable bin body 11 and bin cover 12 allow easy access to the inside of the bin body 11 for cleaning. A guide chute is provided on the outside of the discharge port 103 to facilitate the discharge of raw materials. Both the bin body 11 and the bin cover 12 are made of stainless steel. A connecting pipe 2 is simultaneously located above the uppermost screening bin 1 and below the lowermost screening bin 1. A motor mounting plate 201 is provided at the upper end of the uppermost connecting pipe 2, and the upper end of the connecting pipe 2 is connected to the bin body 1. The lower end of body 11 and the lower end of connecting pipe 2 are bolted to the upper surface of the lower bin cover 12. Through the detachable connecting pipe 2, any number of screening bins 1 can be combined according to screening needs. A motor 3 is installed above the motor mounting plate 201. The output shaft of the motor 3 is vertically connected to a drive shaft 301. The drive shaft 301 passes through all screening bins 1 via the connecting pipe 2, and there is space between the drive shaft 301 and the connecting pipe 2. The drive shaft 301 moves through the center of the screen 102. A pusher plate 302 is installed on the drive shaft 301, located on each screen 102, and the lower surface of the pusher plate 302 contacts the screen 102. 2. The lower surface and outer side of the pusher plate 302 are provided with bristles 303, and the bristles 303 are in contact with the upper surface of the screen 102 and the inner side of the screening chamber 1. The bristles 303 can effectively prevent the screen 102 from clogging. The raw materials are screened through the inside of the screening chamber 1 and transported through the connecting pipe 2. The screen 102 with the screen holes decreasing in size from top to bottom can screen and retain raw materials of different coarseness. The raw materials retained on the screen 102 are easily discharged through the discharge port 103. The motor 3 and the drive shaft 301 can drive the pusher plate 302 to push the raw materials on the screen 102, thereby accelerating the screening of the raw materials.

[0018] The working principle of this utility model is as follows: The motor 3 is started, which drives the shaft 301 to drive the pusher plate 302 to scrape on the screen 102. The particulate raw material to be screened is put into the feed port 101. The raw material is driven by the pusher plate 302 and moves on the screen 102, and is gradually screened. Large particles are left on the screen 102, and small particles reach the lower screen through the connecting pipe 2 and are then screened. Finally, the screened particulate raw material is discharged from the bottom connecting pipe 2. The particulate raw material left on the screen 102 can be discharged by opening the discharge port 103.

[0019] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0020] 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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. In addition, 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 technical features indicated. 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.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0022] Components not described in detail in this article are existing technologies.

[0023] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A multi-stage screening device comprising a screening bin (1), characterized in that, The screening chamber (1) is a cylindrical structure with an inverted cone shape at the bottom and a hollow interior. There are several screening chambers (1), which are connected by a connecting pipe (2). The side of each screening chamber (1) is provided with a discharge port (103) that can be closed by a pull-out cover. The uppermost screening chamber (1) is provided with a feed inlet (101) on its upper surface. The screening chamber (1) is provided with a screen (102) inside, which is located below the discharge port (103). The diameter of the screen holes of the screens (102) decreases from top to bottom. The connecting pipe (2) is provided above the uppermost screening chamber (1) and below the lowermost screening chamber. (1) At the lower end of the uppermost connecting pipe (2), a motor mounting plate (201) is provided; a motor (3) is provided above the motor mounting plate (201), and the output shaft of the motor (3) is vertically connected to a drive shaft (301). The drive shaft (301) passes through all screening chambers (1) through the connecting pipe (2), and there is space between the drive shaft (301) and the connecting pipe (2). The drive shaft (301) moves through the center of the screen (102). A pusher plate (302) is provided on the drive shaft (301). The pusher plate (302) is located on each screen (102), and the lower surface of the pusher plate (302) contacts the screen (102).

2. A multi-stage screening apparatus according to claim 1, wherein: The screening chamber (1) includes a chamber body (11) and a chamber cover (12). The chamber body (11) has an open structure at the top. The chamber cover (12) is bolted to the top of the chamber body (11) and closes the upper opening of the chamber body (11).

3. A multi-stage screening apparatus according to claim 1, wherein: A guide trough is provided on the outside of the discharge port (103).

4. The multi-stage screening device according to claim 1, characterized in that: The pusher plate (302) has bristles (303) on its lower surface and outer side, and the bristles (303) are in contact with the upper surface of the screen (102) and the inner side of the screening chamber (1).

5. A multi-stage screening apparatus according to claim 2, wherein: The upper end of the connecting pipe (2) is connected to the lower end of the silo body (11), and the lower end of the connecting pipe (2) is connected to the upper surface of the lower silo cover (12) by bolts.

6. A multi-stage screening apparatus according to claim 2, wherein: Both the container body (11) and the container cover (12) are made of stainless steel.

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