Novel cylinder precleaner

Abstract

The utility model relates to a novel cylinder precleaner which comprises a screen drum capable of rotating, a feeding mechanism is arranged at one end of the screen drum, an impurity outlet is formed in the other end of the screen drum, the screen drum is obliquely arranged and is obliquely and downwards arranged in the direction from the feeding mechanism to the impurity outlet, a discharging hopper is arranged below the screen drum, and an impurity discharging hopper is arranged below one end of the impurity outlet of the screen drum. The feeding mechanism is provided with a feeding port formed outside the screen drum and a discharging port formed in the screen drum, the discharging port is arranged in the screen drum in an offset mode, and the offset direction of the discharging port is opposite to the rotating direction of the screen drum. When grain materials enter the screen drum, the biased discharge port can advance blanking points of the grain materials along the tangential direction of the screen drum, so that the contact area between the grain materials and the screen drum is increased, and the utilization rate of the screening area of the screen drum is increased.

Description

Technical Field

[0001] This utility model belongs to the technical field of grain and granular material screening equipment, specifically relating to a novel cylindrical primary cleaning screen used for grain screening and impurity removal. Background Technology

[0002] A cylindrical primary cleaning screen is a commonly used grain screening machine. It is generally suitable for the preliminary cleaning and impurity removal of harvested grain materials, such as corn, wheat, rice, and soybeans, to remove primary large impurities. It separates clean grains from impurities based on the density, thickness, and diameter of the material. The cylindrical primary cleaning screen is most effective at removing large impurities from grain materials, with high efficiency. After harvesting, the grain material enters the hopper of the cylindrical primary cleaning screen and automatically flows into the screen cylinder through a chute. During the rotation of the screen cylinder, the grain material is screened and impurities are removed. Particles smaller than the screen aperture pass through the screen holes and fall into the material outlet, while particles larger than the screen aperture remain inside the screen cylinder and eventually flow out from the impurity outlet, thus achieving the removal of large impurities from the grain material.

[0003] However, the following problems were found during actual use of the cylindrical primary cleaning screen:

[0004] 1. The outlet of the chute of the existing cylindrical primary cleaning screen is located in the middle of the screen cylinder. After the grain material enters the screen cylinder along the chute, it will be carried to one side by the rotating screen cylinder. When the grain material reaches the vicinity of the horizontal center line of the screen cylinder, it will roll and fall under the action of gravity. Therefore, the effective utilization area of ​​the screen cylinder is very small.

[0005] 2. When the grain material slides down the chute into the screen cylinder, the grain material has a high initial velocity along the axial direction of the screen cylinder. Under the action of this initial velocity, the grain material will leap into the screen cylinder, which results in no contact between the grain material and the end of the screen cylinder with the chute. This creates a gap at the end of the screen cylinder with the chute, resulting in a small effective utilization area of ​​the screen cylinder.

[0006] 3. Due to strength requirements, existing screen cylinders have a large number of plate-shaped reinforcing ribs distributed along their length. The reinforcing ribs are usually arranged perpendicular to the inner surface of the screen cylinder. When the screen cylinder rotates, the reinforcing ribs will lift the grain material and throw it off the screen surface, thereby reducing the screening efficiency of the screen cylinder.

[0007] 4. After the grain material is screened in the screen cylinder, the screened impurities will continue to move along the screen cylinder towards the impurity outlet. During this process, some of the large rod-shaped impurities will stand up due to the movement. The standing rod-shaped impurities will fall into the screened grain material through the mesh of the screen cylinder, affecting the quality of the screened grain material. Utility Model Content

[0008] In summary, to overcome the shortcomings of existing technologies, this utility model provides a novel cylindrical primary cleaning screen. The material inlet of this primary cleaning screen is offset, and its offset direction is opposite to the rotation direction of the screen cylinder. When grain material enters the screen cylinder, the offset material inlet allows the material's drop point to be advanced along the tangential direction of the screen cylinder, thereby increasing the contact area between the grain material and the screen cylinder and improving the utilization rate of the screen cylinder's screening area.

[0009] To solve the above-mentioned technical problems, the technical solution of this utility model is implemented as follows:

[0010] A novel cylindrical primary cleaning screen includes a rotatable screen cylinder, a feeding mechanism at one end of the screen cylinder, and a waste outlet at the other end of the screen cylinder. The screen cylinder is inclined and arranged downwards along the direction from the feeding mechanism to the waste outlet. A discharge hopper is provided below the screen cylinder, and a waste removal hopper is provided below one end of the waste outlet of the screen cylinder. The feeding mechanism has a feed inlet located outside the screen cylinder and a discharge outlet located inside the screen cylinder. The discharge outlet is offset inside the screen cylinder, and its offset direction is opposite to the rotation direction of the screen cylinder.

[0011] Furthermore, the feeding mechanism includes a feeding hopper, an inclined chute, and a feeding hopper connected in sequence. The feeding hopper is located outside the screen cylinder. The inclined chute extends from the outside into the screen cylinder, and the center of the inclined chute is concentric with the center of the end face of the screen cylinder. The feeding hopper is located inside the screen cylinder. One end of the feeding hopper is connected to the inclined chute, and the opening at the other end of the feeding hopper is the discharge port. The feeding hopper is arranged at an angle inside the screen cylinder. Along the direction from the inclined chute to the discharge port, it is inclined in the opposite direction to the rotation direction of the screen cylinder, and the discharge port is located on the side of the longitudinal centerline of the screen cylinder opposite to the rotation direction.

[0012] Furthermore, it also includes a gravity unloading gate, which is connected to the discharge port of the feeding mechanism. The gravity unloading gate includes a door panel and a counterweight. The door panel is hinged to the upper end of the discharge port of the cloth hopper, and the door panel is provided with a counterweight.

[0013] Furthermore, the screen cylinder is equipped with spiral conveying blades, which are located at one end of the screen cylinder's impurity outlet.

[0014] Furthermore, the screen cylinder is provided with reinforcing ribs, the reinforcing ribs have sloping surfaces, the angle between the sloping surfaces and the screen cylinder is 10~60°, and the extension direction A of the sloping surfaces is opposite to the rotation direction of the screen cylinder.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The discharge port of the feeding mechanism of this utility model is offset inside the screen cylinder, and its offset direction is opposite to the rotation direction of the screen cylinder. When the grain material enters the screen cylinder, the offset discharge port can make the drop point of the grain material advance along the tangential direction of the screen cylinder, thereby increasing the contact area between the grain material and the screen cylinder and improving the utilization rate of the screen cylinder screening area.

[0017] 2. The gravity unloading gate of this utility model can effectively reduce the initial velocity of grain materials when they enter the screen cylinder, thereby reducing the distance the grain materials fly out of the inclined chute, thus improving the utilization rate of the screening area of ​​the screen cylinder and improving the screening efficiency of the cylindrical primary cleaning screen.

[0018] 3. The reinforcing rib of this utility model has a sloping surface, and the extension direction A of the sloping surface is opposite to the rotation direction of the screen cylinder. The reinforcing rib improves the strength of the screen cylinder. With the sloping surface of the reinforcing rib, the material carried by the reinforcing rib will slide down the sloping surface during the rotation of the screen cylinder, thereby effectively reducing the material carried by the reinforcing rib during the screening process.

[0019] 4. The screen cylinder of this utility model is provided with a spiral conveying blade at one end of the impurity outlet. The spiral conveying blade not only helps to discharge large impurities in the screen cylinder, but also forms a barrier in the screen cylinder to prevent the grain material from flowing to the impurity outlet.

[0020] 5. This utility model has a simple structure, low cost, convenient use, and wide application range. It can effectively improve the screening area utilization rate of the cylindrical primary cleaning screen, thereby improving screening efficiency and increasing the output of the cylindrical primary cleaning screen, and meeting the requirements for cleaning impurities from materials before they enter large storage warehouses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This utility model Figure 1 Schematic diagram of the BB cross-section structure;

[0023] Figure 3 This utility model Figure 2 Enlarged schematic diagram of part C. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] like Figures 1-3As shown, a novel cylindrical primary cleaning screen includes a rotatable screen cylinder 1. A feeding mechanism is located at one end of the screen cylinder 1, and a waste outlet 4 is located at the other end. The screen cylinder 1 is inclined, oriented downwards along the direction from the feeding mechanism to the waste outlet 4. A reinforcing rib 12 is provided inside the screen cylinder 1, and the reinforcing rib 12 has a sloped surface 13. The angle between the sloped surface 13 and the screen cylinder 1 is 10~60°, and the extension direction A of the sloped surface 13 is opposite to the rotation direction of the screen cylinder 1. A discharge hopper 2 is located below the screen cylinder 1, and a waste removal hopper 3 is located below one end of the waste outlet 4. A spiral conveying blade 11 is provided inside the screen cylinder 1, located at one end of the waste outlet 4. The feeding mechanism has a feed inlet located outside the screen cylinder 1 and a discharge outlet 5 located inside the screen cylinder 1. The discharge outlet 5 is offset inside the screen cylinder 1, and its offset direction is opposite to the rotation direction of the screen cylinder 1. The feeding mechanism includes a feeding hopper 6, an inclined chute 7, and a feeding hopper 8 connected in sequence. The feeding hopper 6 is located outside the screen cylinder 1. The inclined chute 7 extends from the outside into the screen cylinder 1, and its center is concentric with the center of the end face of the screen cylinder 1. The feeding hopper 8 is located inside the screen cylinder 1. One end of the feeding hopper 8 is connected to the inclined chute 7, and the opening at the other end of the feeding hopper 8 is the discharge port 5. The feeding hopper 8 is arranged at an angle inside the screen cylinder 1, and it is inclined in the opposite direction to the rotation direction of the screen cylinder 1 along the direction from the inclined chute 7 to the discharge port 5. The discharge port 5 is located on the side opposite to the rotation direction of the longitudinal centerline of the screen cylinder 1. A gravity discharge gate is provided on the discharge port 5. The gravity discharge gate includes a door panel 9 and a counterweight 10. The door panel 9 is hinged to the upper end of the discharge port 5 of the feeding hopper 8, and the door panel 9 is provided with the counterweight 10.

[0026] In use, the grain material enters through the feed inlet at the top of the feed hopper 6 of the feeding mechanism, then slides down along the inclined chute 7, is guided by the cloth hopper 8, and falls into the screen cylinder 1 from the discharge port 5. The screen cylinder 1 rotates, and the grain material entering the screen cylinder 1 moves along the rotation direction of the screen cylinder 1 under the action of the screen cylinder 1. At the same time, due to the inclined arrangement of the screen cylinder 1, the grain material moves towards the impurity outlet 4 along the inclined direction of the screen cylinder 1. The screen cylinder 1 screens and removes impurities from the grain material. The material with particles smaller than the screen hole diameter passes through the screen hole of the screen cylinder 1 and falls into the discharge hopper 2. The impurities with particles larger than the screen hole diameter are left in the screen cylinder 1 and are then transported to the impurity outlet 4 under the action of the spiral conveyor blades 11. They flow out from the impurity outlet 4 and fall into the impurity discharge hopper 3, thereby achieving the initial cleaning and impurity removal of the grain material, removing impurities such as straw, stalks, stones, and soil clods from the grain material.

[0027] It should be noted that the above-described embodiments are illustrative of the technical solution of this utility model and not limiting. Equivalent substitutions or other modifications made by those skilled in the art based on the prior art, as long as they do not exceed the concept and scope of the technical solution of this utility model, should be included within the scope of the claims of this utility model.

Claims

1. A new type of cylinder primary screen characterized in that: The screen includes a rotatable screen cylinder (1), one end of which is provided with a feeding mechanism and the other end of which is provided with a waste outlet (4). The screen cylinder (1) is inclined and is arranged downward along the direction from the feeding mechanism to the waste outlet (4). A discharge hopper (2) is provided below the screen cylinder (1). A waste discharge hopper (3) is provided below one end of the waste outlet (4) of the screen cylinder (1). The feeding mechanism has a feed inlet outside the screen cylinder (1) and a discharge outlet (5) inside the screen cylinder (1). The discharge outlet (5) is offset inside the screen cylinder (1) and its offset direction is opposite to the rotation direction of the screen cylinder (1).

2. The novel cylinder cleaning screen according to claim 1, characterized in that: The feeding mechanism includes a feeding hopper (6), an inclined chute (7), and a feeding hopper (8) connected in sequence. The feeding hopper (6) is located outside the screen cylinder (1). The inclined chute (7) passes through the screen cylinder (1) from the outside to the inside, and the center of the inclined chute (7) is concentrically arranged with the center of the end face of the screen cylinder (1). The feeding hopper (8) is located inside the screen cylinder (1). One end of the feeding hopper (8) is connected to the inclined chute (7), and the opening at the other end of the feeding hopper (8) is the discharge port (5). The feeding hopper (8) is arranged at an inclination inside the screen cylinder (1). It is inclined in the opposite direction to the rotation direction of the screen cylinder (1) along the direction from the inclined chute (7) to the discharge port (5). The discharge port (5) is located on the side of the longitudinal centerline of the screen cylinder (1) opposite to the rotation direction.

3. The novel cylinder cleaning screen according to claim 1 or 2, characterized in that: It also includes a gravity unloading gate, which is connected to the discharge port (5) of the feeding mechanism. The gravity unloading gate includes a door panel (9) and a counterweight (10). The door panel (9) is hinged to the upper end of the discharge port (5) of the cloth hopper (8). The door panel (9) is provided with a counterweight (10).

4. The novel cylinder cleaning screen according to claim 1 or 2, characterized in that: The screen cylinder (1) is provided with a spiral conveying blade (11), which is located at one end of the impurity outlet (4) of the screen cylinder (1).

5. The novel cylinder cleaning screen according to claim 1 or 2, characterized in that: The screen cylinder (1) is provided with a reinforcing rib (12), the reinforcing rib (12) has a slope surface (13), the angle between the slope surface (13) and the screen cylinder (1) is 10~60°, and the extension direction A of the slope surface (13) is opposite to the rotation direction of the screen cylinder (1).

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