A drum-type grain screening device

Abstract

This utility model belongs to the field of grain screening technology, specifically relating to a drum-type grain screening device, including a box body. A gasket is provided on the upper inner wall of the box body, and a drum screen is provided on one side of the gasket. An installation plate is provided on the outer side of the box body, and a motor is mounted on the installation plate. A stirring shaft is connected to the motor output shaft, and stirring blades are provided on the stirring shaft, located inside the drum screen. An air guide pipe is provided on the lower side of the drum screen, and multiple air nozzles are evenly distributed on the air guide pipe. A first scraper is provided on one side of the drum screen, and a second scraper is provided on the other side. A discharge port is provided on the lower side of the box body, and a slag discharge port is provided on one side of the box body. This utility model uses a first scraper to remove large impurities from the outer surface of the screen, a second scraper to remove impurities entangled inside the screen, and air nozzles to blow away dust, achieving dual impurity removal through "mechanical scraping + airflow blowing".

Description

Technical Field

[0001] This utility model belongs to the field of grain screening technology, specifically relating to a drum-type grain screening device. Background Technology

[0002] Existing drum-type grain screening devices suffer from the following technical bottlenecks: frequent screen clogging; dust and fine particles in the grain easily adhere to the screen openings; traditional vibration or unidirectional air jet cleaning methods have limited effectiveness, requiring frequent shutdowns for cleaning (e.g., CN218989345U uses a vibration motor for clogging, but it is ineffective against sticky impurities); insufficient mixing; ordinary straight-blade agitators easily create dead zones, leading to uneven grain distribution and reduced screening accuracy; and incomplete impurity separation; gravity screening alone is insufficient to separate impurities of similar density, and lighter impurities easily entangle the screen, affecting its service life. Therefore, an innovative screening device with efficient clogging removal, uniform mixing, and multiple impurity separation functions is needed. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the existing technology, the present invention provides a drum-type grain screening device to solve the problems in the background technology.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A drum-type grain screening device includes a housing. A gasket is provided on the upper inner wall of the housing. A drum screen is located on one side of the gasket. A feed inlet is located on one side of the housing. An installation plate is located on the outer side of the housing. A motor is mounted on the installation plate. A stirring shaft is connected to the output shaft of the motor. Stirring blades are mounted on the stirring shaft and are located inside the drum screen. An air guide pipe is located below the drum screen. Multiple air nozzles are evenly distributed on the air guide pipe. A first scraper is located on one side of the drum screen, and a second scraper is located on the other side of the drum screen. A discharge port is located below the housing, and a slag discharge port is located below the second scraper.

[0006] Furthermore, the upper side of the box is provided with a box cover, the box is fixedly connected to the first scraper, the box is fixedly connected to the second scraper, and the gap between the scraper blade and the drum screen is 1mm.

[0007] Furthermore, a flange is provided on the discharge port, bearings are provided on both sides of the stirring shaft, and fixing plates are provided on both sides of the box body, with the bearings and fixing plates fixedly connected.

[0008] Furthermore, the air guide tube is a seamless steel pipe, and the upper air nozzle of the two rows of air nozzles is tilted upward at 30 degrees, while the lower air nozzle is tilted downward at 10 degrees.

[0009] Furthermore, the drum screen is fixedly connected to the stirring shaft, and the air guide pipe is fixedly connected to the housing.

[0010] Furthermore, the stirring blades are helical blades, the first scraper and the second scraper are made of alloy tool steel, and the gap between the stirring blades and the drum screen is 1mm.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] Highly efficient unblocking ensures continuous operation. The bidirectional air jet nozzles simultaneously blow from inside and outside the screen, combined with the mechanical scraping of the rotating scraper, effectively solving the screen clogging problem and significantly extending the continuous operation time of the equipment.

[0013] The spiral blades achieve axial conveying while stirring, making the grain more evenly distributed in the screen and improving screening efficiency and accuracy.

[0014] A 1mm precision gap control prevents direct contact between the scraper and the screen, extending the screen's service life; the first scraper removes large impurities from the outer surface of the screen, the second scraper removes entangled impurities inside the screen, and the air jet nozzle blows away dust, achieving dual impurity removal through "mechanical scraping + airflow blowing". Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a drum-type grain screening device according to the present invention;

[0016] Figure 2 This is a cross-sectional view of a drum-type grain screening device according to the present invention;

[0017] Figure 3 A three-dimensional structural diagram of the anti-blocking component;

[0018] The reference numerals in the accompanying drawings of the instruction manual include: 1. Box body; 101. Fixing plate; 2. Box cover; 3. Feed inlet; 4. Drum screen; 5. Motor; 51. Mounting plate; 6. Slag outlet; 7. Stirring shaft; 8. Stirring blades; 9. Air guide pipe; 10. Discharge outlet; 11. First scraper; 12. Second scraper; 13. Air nozzle; 14. Gasket. Detailed Implementation

[0019] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between 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.

[0023] Example 1:

[0024] like Figure 1 As shown in the figure, this utility model discloses a drum-type grain screening device, including a box body 1. A gasket 14 is provided on the upper inner wall of the box body 1. A drum screen 4 is provided on one side of the gasket 14. A feed inlet 3 is provided on one side of the box body 1. An installation plate 51 is provided on the outer side of the box body 1. A motor 5 is provided on the installation plate 51. A stirring shaft 7 is connected to the output shaft of the motor 5. A stirring blade 8 is provided on the stirring shaft 7. The stirring blade 8 is located inside the drum screen 4. An air guide pipe 9 is provided on the lower side of the drum screen 4. Multiple air nozzles 13 are evenly provided on the air guide pipe 9. A first scraper 11 is provided on one side of the drum screen 4. A second scraper 12 is provided on the other side of the drum screen 4. A discharge port 10 is provided on the lower side of the box body 1. A slag outlet 6 is provided on the lower side of the second scraper 12.

[0025] The upper side of the housing 1 is provided with a cover 2. The housing 1 is fixedly connected to the first scraper 11 and the second scraper 12. The scraper blade is gapped with the drum screen 4. Specifically, the scraper blade maintains a 1mm gap with the outer surface of the drum screen to scrape off impurities from the outer surface of the screen.

[0026] A flange is provided on the discharge port 10, bearings are provided on both sides of the stirring shaft 7, and fixing plates 101 are provided on both sides of the housing 1. The bearings are fixedly connected to the fixing plates 101. Specifically, the rigid support of the bearings and fixing plates ensures smooth operation of the stirring shaft and lower noise.

[0027] The air guide pipe 9 is a seamless steel pipe. The upper air nozzle 13 of the two rows of air nozzles 13 is tilted upward at 30 degrees, and the lower air nozzle 13 is tilted downward at 10 degrees. Specifically, the upper row is tilted 30 degrees upward and aligned with the inner surface of the screen, and the lower row is tilted 10 degrees downward and aligned with the outer surface of the screen, so as to achieve simultaneous dust removal inside and outside the screen.

[0028] The drum screen 4 is fixedly connected to the stirring shaft 7, and the air guide pipe 9 is fixedly connected to the housing 1. This ensures that the stirring shaft drives the drum screen to rotate stably.

[0029] The stirring blade 8 is a spiral blade, and the first scraper 11 and the second scraper 12 are made of alloy tool steel. Specifically, the gap between the stirring blade and the drum screen is 1mm to avoid direct contact between the screen and the blade, thus extending the service life of the screen. The spiral blade achieves axial conveying while stirring, making the grain more evenly distributed in the screen and improving screening efficiency and accuracy.

[0030] Operating principle: The fixed plate 101 is fixedly connected to the box body 1 to ensure bearing installation accuracy; the spiral blades 8 are welded to the surface of the stirring shaft 7 to ensure stirring strength; the air guide pipe 9 is fixed to the box body 1 through the bracket, and the air nozzles 13 are evenly distributed; the first scraper 11 and the second scraper 12 are fixed to the box body 1 by bolts, and the gap between the blade edge and the screen is adjustable. Grain falls into the rotating drum screen 4 from the feed port 3 of the box cover 2. The spiral blades 8 stir and convey the grain along the shaft, and qualified fine particles fall into the discharge port 10 through the screen holes.

[0031] The air nozzle 13 on the air duct 9 periodically blows the inner and outer surfaces of the screen to remove dust that clogs the screen holes; the first scraper 11 and the second scraper 12 respectively scrape off impurities inside and outside the screen, and the impurities are discharged through the slag outlet 6.

[0032] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software and methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A drum-type grain screening device, characterized in that: The device includes a housing (1), with a gasket (14) on the upper inner wall of the housing (1), a drum screen (4) on one side of the gasket (14), a feed inlet (3) on one side of the housing (1), an installation plate (51) on the outer side of the housing (1), a motor (5) on the installation plate (51), a stirring shaft (7) connected to the output shaft of the motor (5), stirring blades (8) on the stirring shaft (7), the stirring blades (8) located inside the drum screen (4), an air guide pipe (9) on the lower side of the drum screen (4), two rows of air nozzles (13) evenly arranged on the air guide pipe (9), a first scraper (11) on one side of the drum screen (4), a second scraper (12) on the other side of the drum screen (4), a discharge port (10) on the lower side of the housing (1), and a slag outlet (6) on the lower side of the second scraper (12).

2. The drum-type grain screening device as described in claim 1, characterized in that: The box body (1) is provided with a box cover (2) on the upper side. The box body (1) is fixedly connected to the first scraper (11) and the box body (1) is fixedly connected to the second scraper (12). The scraper blade is connected to the drum screen (4) with a gap.

3. The drum-type grain screening device as described in claim 1, characterized in that: The discharge port (10) is provided with a flange, the stirring shaft (7) is provided with bearings on both sides, and the box body (1) is provided with fixing plates (101) on both sides. The bearings are fixedly connected to the fixing plates (101).

4. The drum-type grain screening device as described in claim 1, characterized in that: The air duct (9) is a seamless steel pipe. The upper air nozzle (13) of the two rows of air nozzles (13) is tilted upward at 30 degrees and the lower air nozzle (13) is tilted downward at 10 degrees.

5. The drum-type grain screening device as described in claim 1, characterized in that: The drum screen (4) is fixedly connected to the stirring shaft (7), and the air guide pipe (9) is fixedly connected to the box body (1).

6. The drum-type grain screening device as described in claim 1, characterized in that: The stirring blade (8) is a spiral blade, and the first scraper (11) and the second scraper (12) are made of alloy tool steel.

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