Screening screw conveyor

Abstract

The utility model discloses a screening screw conveyer which comprises a conveyer shell and a conveying screw, the conveyer shell comprises an upper shell, a middle partition body and a lower shell, the upper shell and the middle partition body form an upper-layer conveying cavity, the middle partition body and the lower shell form a lower-layer conveying cavity, an upper conveying screw is arranged in the upper-layer conveying cavity, and a lower conveying screw is arranged in the lower-layer conveying cavity. A lower conveying screw is arranged in the lower-layer conveying cavity, a plurality of screening holes are formed in the middle partition body, and the screening holes are communicated with the lower-layer conveying cavity; a feed port is formed in the upper shell, an upper-layer discharge port is formed in the middle partition body, and a lower-layer discharge port is formed in the lower shell; and the upper conveying screw and the lower conveying screw are in transmission connection with a conveying motor. By adopting the screening screw conveyer, not only can the conveying of materials be realized, but also the screening or draining operation can be carried out in the conveying process, and the occupation of a production transportation site can be reduced.

Description

Technical Field

[0001] This utility model relates to a conveying device, and more particularly to a spiral conveying device with a screening function. Background Technology

[0002] Screw conveyors transport materials by using a conveying screw inside the conveyor casing. During the conveying process, the conveyed material particles are agitated and moved forward as the screw rotates. They offer good sealing properties and are ideal for conveying various granular materials such as grains. In the processing of granular materials, it is often necessary to classify them according to particle size or remove dust and small sand particles. This usually requires a screening process using specialized screening equipment. After screening, the materials are further classified and conveyed. This not only requires screening equipment but also a large production turnover area. Furthermore, some materials to be conveyed are soaked in liquid. Before proceeding to the next process, the soaking liquid needs to be drained, requiring a draining process as well. This also necessitates turnover area and corresponding tools or equipment. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a screening screw conveyor that can not only realize the conveying of materials, but also perform screening or leaching operations during the conveying process, and reduce the occupation of production and transportation sites.

[0004] To solve the above-mentioned technical problems, this utility model provides a screening screw conveyor, including a conveyor shell and a conveying screw. The conveyor shell includes an upper shell, a middle partition, and a lower shell. The upper shell and the middle partition form an upper conveying cavity, and the middle partition and the lower shell form a lower conveying cavity. An upper conveying screw is provided in the upper conveying cavity, and a lower conveying screw is provided in the lower conveying cavity. A plurality of screening holes are provided on the middle partition, and each screening hole communicates with the lower conveying cavity. A feed inlet is provided on the upper shell, an upper discharge outlet is provided on the middle partition, and a lower discharge outlet is provided on the lower shell. The upper and lower conveying screws are driven by a conveying motor.

[0005] In the above structure, the conveyor housing includes an upper housing, a middle partition, and a lower housing. The upper housing and the middle partition form the upper conveying cavity, and the middle partition and the lower housing form the lower conveying cavity. An upper conveying screw is provided in the upper conveying cavity, and a lower conveying screw is provided in the lower conveying cavity. Several screening holes are provided on the middle partition, and each screening hole is connected to the lower conveying cavity. During the process of material being conveyed by the upper conveying screw in the upper conveying cavity, smaller particles with a diameter smaller than the diameter of the screening holes will fall into the lower conveying cavity by their own weight. The finer particles entering the lower conveying cavity will be conveyed by the lower conveying screw. In this way, material screening and classification conveying operations can be carried out simultaneously on a single screw conveyor, saving the space required for the classified conveying equipment. For liquid-soaked materials, the screening holes on the middle partition can act as a filter, allowing the liquid in the material to flow into the lower conveying cavity by its own weight, thereby achieving a draining effect. This also saves the equipment and space required for screening or draining operations, and improves production efficiency.

[0006] Furthermore, since there is a feed inlet on the upper shell, an upper discharge outlet on the middle partition, and a lower discharge outlet on the lower shell, the materials to be sorted and conveyed can enter the upper conveying chamber from the feed inlet on the upper shell, and then large-diameter materials are output from the upper discharge outlet, while small-diameter materials are output from the lower discharge outlet. For materials that need to be drained, the drained liquid can be output from the lower discharge outlet and discharged in a concentrated manner.

[0007] Furthermore, since the upper and lower conveying screws are connected to the conveying motor, the upper and lower conveying screws can be driven by a single conveying motor simultaneously, making control simple and convenient.

[0008] In a preferred embodiment of this invention, the upper shell and the middle partition are semi-circular, and the semi-circular upper shell and the middle partition are connected by a connecting edge at the opening to form a circular upper conveying cavity. With this embodiment, the semi-circular middle partition can be well matched with the upper conveying screw to achieve screw conveying, and the connection between the upper shell and the middle partition is convenient and easy to disassemble and clean.

[0009] In another preferred embodiment of this utility model, the lower housing is U-shaped, and the U-shaped lower housing is connected to the upper housing and the middle partition through the connecting edge at the opening. With this embodiment, the bottom of the U-shaped lower housing matches the lower conveying screw to achieve spiral conveying, and the connection between the lower housing and the middle partition and the upper housing through the connecting edge at the opening forms an integral conveying housing, which is convenient for installation, connection, and disassembly.

[0010] In another preferred embodiment of this utility model, the feed inlet is located at one end of the upper shell, and the upper discharge outlet is located at the end opposite to the feed inlet. With this embodiment, the feed inlet and the upper discharge outlet are located at opposite ends of the upper conveying chamber, which allows for full utilization of the conveying distance to achieve the screening of particulate materials.

[0011] In a further preferred embodiment of this invention, the lower discharge port and the upper discharge port are located at the same end. With this embodiment, the larger and smaller particle sizes of the screened material are transported to similar locations, facilitating separate processing in subsequent steps.

[0012] In another preferred embodiment of this invention, the upper conveying screw is connected to the output shaft of the conveying motor, and the upper and lower conveying screws are connected by a chain drive. With this embodiment, the conveying motor drives the upper conveying screw while simultaneously driving the lower conveying screw via the chain drive, resulting in a simple structure.

[0013] In another preferred embodiment of this invention, a stirring element is provided on the upper conveying screw, located between the opposing blade surfaces of the conveying blades on the upper conveying screw. This embodiment avoids situations where the material is primarily moved axially during conveying, with insufficient circumferential or radial tumbling, leading to inadequate material screening and thus improving the screening effect.

[0014] In a further preferred embodiment of this invention, the stirring component is a plate-shaped or rod-shaped component, with both ends of the plate-shaped or rod-shaped stirring component fixedly connected to the opposing blade surfaces of the conveying blades. Using this embodiment, the stirring component can be easily installed and fixed, and it can also perform the function of circumferentially and radially agitating the material.

[0015] In another further preferred embodiment of this invention, the stirring elements are spaced apart on the longitudinal section of the upper conveying screw and are staggered on both sides of the upper conveying screw axis. This embodiment ensures that the upper conveying screw maintains stable operation even after the addition of stirring elements.

[0016] In another preferred embodiment of this invention, the stirring element of the plate-shaped component is provided with an opening or holes. This embodiment further improves the stirring effect. Attached Figure Description

[0017] The present invention, a sieve screw conveyor, will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of a specific embodiment of the screening screw conveyor of this utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional view of part AA in the structure shown;

[0020] Figure 3 yes Figure 1 A magnified view of part I in the structure shown.

[0021] In the diagram: 1-Conveyor motor, 2-Chain pair, 3-Feed inlet, 4-Upper shell, 5-Upper conveyor screw, 6-Middle partition, 7-Lower shell, 8-Lower conveyor screw, 9-Upper conveyor chamber, 10-Lower conveyor chamber, 11-Agitator, 12-Lower discharge port, 13-Upper discharge port, 14-Connecting edge, 15-Conveyor blade, 16-Screening hole, 17-Opening or aperture. Detailed Implementation

[0022] exist Figure 1 and Figure 2 In the shown sieving screw conveyor, the upper shell 4, the middle partition 6, and the lower shell 7 are connected by end caps at both ends to form the conveyor shell. The upper shell 4 and the middle partition 6 are both semi-circular. The semi-circular upper shell 4 and the middle partition 6 are connected by the connecting edge 14 at the opening, thus forming a circular upper conveying cavity 9. The two ends of the upper conveying cavity 9 are sealed and connected by corresponding end caps. An upper conveying screw 5 is provided in the upper conveying cavity 9. The two ends of the upper conveying screw 5 are rotatably supported on the corresponding end caps. A feed inlet 3 is provided on the upper shell 4 at one end. An upper discharge outlet 13 is provided at the bottom of the middle partition 6 at the end opposite to the feed inlet 3.

[0023] The lower housing 7 is U-shaped. The U-shaped lower housing 7 is connected to the upper housing 4 and the middle partition 6 via the connecting edge 14 at the opening, thereby forming a lower conveying cavity 10 between the middle partition 6 and the lower housing 7. (See [reference]) Figure 3 The intermediate partition 6 has several screening holes 16, each of which is connected to the lower conveying chamber 10. The length of the U-shaped lower shell 7 is less than the length of the upper shell 4 and the intermediate partition 6. The two ends of the lower conveying chamber 10 are sealed together by corresponding end caps. The end cap at one end of the feed inlet 3 is integrated with the end cap of the upper conveying chamber 9, and the upper edge of the end cap at the other end is fitted and sealed to the intermediate partition 6. The screening holes 16 on the intermediate partition 6 are located inside the end cap, and the end cap is adjacent to the upper discharge port 13. The upper discharge port 13 is skewed to facilitate discharge. A lower conveying screw 8 is provided in the lower conveying chamber 10. The lower conveying screw is also rotatably supported on the end caps at both ends. The upper conveying screw 5 and the lower conveying screw 8 are connected to the conveying motor 1. The upper conveying screw 5 is connected to the output shaft of the conveying motor 1, and the upper conveying screw 5 and the lower conveying screw 8 are connected by a chain pair 2.

[0024] The lower housing 7 is provided with a lower discharge port 12, which is located at the same end as the upper discharge port 13. Of course, depending on actual needs, the lower discharge port 12 and the upper discharge port 13 can also be located at opposite ends. Correspondingly, the conveying direction of the lower conveying screw 8 must correspond to the position of the lower discharge port 12. If the lower conveying chamber 10 is mainly for the function of draining liquid, a drain port can also be set at any position at the bottom of the lower housing 7 as needed.

[0025] An agitator 11 is provided on the upper conveying screw 5. The agitator 11 is located between the opposing blade surfaces of the conveying blades 15 on the upper conveying screw 5, and is distributed at intervals on the longitudinal section of the upper conveying screw 5, and is staggered on both sides of the axis of the upper conveying screw 5. The agitator 11 is preferably a plate-shaped member or a rod-shaped member. The two ends of the agitator 11 of the plate-shaped member or rod-shaped member are respectively fixed to the opposing blade surfaces of the conveying blades 15. The agitator 11 shown in the figure is a plate-shaped member. An opening or hole 17 is provided on the agitator 11 of the plate-shaped member. When the agitator 11 is a rod-shaped member, the cross-sectional shape of the rod-shaped member can be circular or polygonal, and several rod-shaped members can be arranged radially.

[0026] The above are only some preferred embodiments of this utility model, but this utility model is not limited thereto, and many improvements and modifications can be made. For example, the stirring component 11 of the plate-shaped or rod-shaped component may not be fixed at both ends to the opposite blade surfaces of the conveying blades 15, but may be fixed to the mandrel of the upper conveying screw 5; the upper conveying screw 5 and the lower conveying screw 8 may not be connected by a chain pair 2, but may be connected by a toothed belt pair or a gear pair, or the lower conveying screw 8 may not be connected to the upper conveying screw 5, but may be connected to the output shaft of another conveying motor. All such improvements and modifications made based on the basic principles of this utility model should be considered to fall within the protection scope of this utility model.

Claims

1. A screening screw conveyor, comprising a conveyor casing and a conveying screw, characterized in that: The conveyor housing includes an upper housing (4), a middle partition (6), and a lower housing (7). The upper housing (4) and the middle partition (6) form an upper conveying cavity (9), and the middle partition (6) and the lower housing (7) form a lower conveying cavity (10). An upper conveying screw (5) is provided in the upper conveying cavity (9), and a lower conveying screw (8) is provided in the lower conveying cavity (10). Several screening holes (16) are provided on the middle partition (6), and each screening hole (16) is connected to the lower conveying cavity (10). A feed inlet (3) is provided on the upper housing (4), an upper discharge outlet (13) is provided on the middle partition (6), and a lower discharge outlet (12) is provided on the lower housing (7). The upper conveying screw (5) and the lower conveying screw (8) are connected to the conveying motor (1) for transmission.

2. The screening screw conveyor according to claim 1, characterized in that: The upper shell (4) and the middle partition (6) are semi-circular. The semi-circular upper shell (4) and the middle partition (6) are connected by the connecting edge (14) at the opening to form a circular upper conveying cavity (9).

3. The screening screw conveyor according to claim 1 or 2, characterized in that: The lower housing (7) is U-shaped, and the U-shaped lower housing (7) is connected to the upper housing (4) and the middle partition (6) through the connecting edge (14) at the opening.

4. The screening screw conveyor according to claim 1, characterized in that: The feed inlet (3) is located at one end of the upper shell (4), and the upper discharge outlet (13) is located at the end opposite to the feed inlet (3).

5. The screening screw conveyor according to claim 1, characterized in that: The lower discharge port (12) and the upper discharge port (13) are located at the same end.

6. The screening screw conveyor according to claim 1, characterized in that: The upper conveying screw (5) is connected to the output shaft of the conveying motor (1), and the upper conveying screw (5) and the lower conveying screw (8) are connected by a chain pair (2).

7. The screening screw conveyor according to claim 1, characterized in that: An agitator (11) is provided on the upper conveying screw (5), and the agitator (11) is located between the opposing blade surfaces of the conveying blades (15) on the upper conveying screw (5).

8. The screening screw conveyor according to claim 7, characterized in that: The stirring component (11) is a plate-shaped component or a rod-shaped component, and the two ends of the stirring component (11) are respectively fixed to the opposite blade surfaces of the conveying blade (15).

9. The screening screw conveyor according to claim 7 or 8, characterized in that: The stirring components (11) are spaced apart on the longitudinal section of the upper conveying spiral (5) and are staggered on both sides of the axis of the upper conveying spiral (5).

10. The screening screw conveyor according to claim 8, characterized in that: The stirring element (11) of the plate-shaped component is provided with an opening or hole (17).

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