Air suction pre-cleaning device for grain materials

Abstract

The utility model relates to a grain material air suction pre-cleaning device which comprises a shell, an inner cavity of the shell is divided into a feeding chamber and a settling chamber by a partition plate, an impurity removal air channel is formed between the upper portion of the partition plate and a top plate of the shell and communicated with the feeding chamber and the settling chamber, and after airflow enters the settling chamber through the impurity removal air channel, the flow speed is reduced. A separation barrel with ventilation holes densely formed in the peripheral wall is arranged in the settling chamber, an inner cavity of the separation barrel is communicated with an air inlet of a centrifugal fan, an air outlet of the centrifugal fan is communicated with an air return opening in the shell through an air return pipeline, and the air return opening is formed in the lower portion of the feeding chamber. Air flow carries light and fine impurities in grain materials to flow from bottom to top, after the air flow enters the settling chamber through the impurity removal air duct, due to the fact that the space is increased, the flow speed of the air flow is reduced, the light and fine impurities naturally settle, the light and fine impurities are removed, and the air flow enters the feeding chamber again through the inner cavity of the separation barrel, the air return pipeline and the air return opening under the action of the centrifugal fan. And circular flow of airflow is realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of grain screening, dust removal and impurity removal equipment, specifically relating to a grain material suction pre-cleaning device used in grain screening and impurity removal. Background Technology

[0002] When grains are stored, they often contain impurities such as straw, dust, stones, and clods. These impurities can cause the grain to overheat and mold, affecting its quality and hindering its flow out of the warehouse, leading to significant losses and reduced efficiency. Therefore, preliminary cleaning of the grain is essential before storage to remove impurities and some dust. Heavy impurities like stones and straw can be removed using screening devices such as primary cleaning screens and vibrating screens. However, lighter impurities like straw and dust typically require separate dust collection equipment. Existing dust collection systems generally require fans and dust collectors, resulting in high costs and large space requirements. Utility Model Content

[0003] In summary, in order to overcome the shortcomings of the existing technology, this utility model provides a grain material suction pre-cleaning device, which separates and removes light and fine impurities from the grain material through circulating airflow, and then uses the change of airflow velocity to make the light and fine impurities in the airflow settle naturally and be discharged, thereby realizing the cleaning and removal of light and fine impurities from the grain material.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is implemented as follows:

[0005] A grain material suction pre-cleaning device includes a shell, within which a partition divides the shell's interior into a feeding chamber and a settling chamber. A dust removal duct is formed between the upper part of the partition and the top plate of the shell, connecting the feeding chamber and the settling chamber. The airflow velocity decreases after entering the settling chamber through the dust removal duct.

[0006] The settling chamber is equipped with a separation cylinder, and the upper part of the partition plate is located between the separation cylinder and the top plate of the shell. The peripheral wall of the separation cylinder is densely covered with ventilation holes.

[0007] A return air system is provided on the outside of the housing. The return air system includes a centrifugal fan. The air inlet of the centrifugal fan is connected to the inner cavity of the separator. The air outlet of the centrifugal fan is connected to a return air port on the housing through a return air duct located outside the housing. The return air port is located at the lower part of the feeding chamber.

[0008] The feeding chamber has a feeding inlet at the top and a funnel-shaped discharge outlet at the bottom, which is located below the return air vent.

[0009] The lower end of the settling chamber is provided with a conical impurity collection cavity, which is connected to the impurity outlet.

[0010] Furthermore, the collection chamber is equipped with a discharge auger for conveying the light impurities collected in the collection chamber to the discharge outlet, and the discharge auger is arranged along the length of the collection chamber.

[0011] Furthermore, the feeding chamber is provided with an inclined guide plate, which is inclined downward along the direction from the feeding port to the partition, and the guide plate is positioned above the return air port.

[0012] Furthermore, the baffle includes an inclined lower guide section and an arc-shaped section connected to the upper end of the lower guide section, the arc-shaped section covering the top of the separation cylinder.

[0013] Furthermore, the discharge port is equipped with a windproof unloading device.

[0014] Furthermore, a return air system is provided on the outer shell of both ends of the separator cylinder.

[0015] Furthermore, it also includes a material leveling device, which is disposed in the feeding chamber and arranged below the feeding inlet. The material leveling device includes a material leveling power device, a material leveling shaft, a first spiral blade, and a second spiral blade. The material leveling shaft is arranged along the length of the feeding chamber and is rotatably connected to the feeding chamber. The material leveling power device is provided on the housing and is connected to the material leveling shaft to provide power for the rotation of the material leveling shaft. The material leveling shaft is provided with a first spiral blade and a second spiral blade. The first spiral blade is arranged from the middle of the material leveling shaft to one end of the material leveling shaft, and the second spiral blade is arranged from the middle of the material leveling shaft to the other end of the material leveling shaft. The middle of the material leveling shaft is located below the feeding inlet, and the rotation direction of the first spiral blade is opposite to that of the second spiral blade.

[0016] Furthermore, it also includes an air regulating device connected to the return air duct. The air regulating device includes an air regulating plate and an air regulating handle. The air regulating plate is installed inside the return air duct and is rotatably connected to the return air duct. The air regulating plate is connected to the air regulating handle installed outside the return air duct.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model separates and removes light and fine impurities from grain materials through a circulating airflow. The airflow carrying the light and fine impurities enters the settling chamber through the impurity removal duct. Because the settling chamber is larger than the impurity removal duct, the airflow decreases as it moves from a smaller space to a larger space. The light and fine impurities carried in the airflow settle under gravity, are collected in the conical impurity collection chamber, and then conveyed to the impurity outlet by the impurity discharge auger, thus achieving the removal of light and fine impurities from the grain materials. The settling and collection of light and fine impurities is achieved through changes in airflow velocity, eliminating the need for additional dust removal equipment and reducing dust removal costs.

[0019] 2. This utility model features a uniform feeding device inside the feeding chamber. Grain entering through the inlet is dispersed by this device and flows downwards. Airflow flows upwards from the bottom of the feeding chamber. As it flows through the dispersed grain, inclined impurities are carried upwards by the airflow and enter the settling chamber via the impurity removal duct. In the settling chamber, fine impurities settle, and the airflow enters the inner cavity of the separation cylinder through the vent. It then flows along the inner cavity and, under the action of a centrifugal fan, re-enters the feeding chamber through the return air duct and return air inlet, achieving airflow circulation. This internal self-circulation of the airflow prevents external exhaust, reducing dust pollution.

[0020] 3. The uniform material distribution device of this utility model uses two spiral blades with opposite rotation directions to disperse the grain material from the middle to both sides, which can evenly spread and disperse the grain material in a small space.

[0021] 4. The feeding chamber of this utility model is equipped with an inclined guide plate, which covers the return air inlet. The airflow that re-enters the feeding chamber from both sides of the shell through the return air inlet is redirected at the lower end of the guide plate. The grain material moves along the upper end of the guide plate. At the gap between the lowest end of the guide plate and the partition, the airflow passes vertically through the grain material flow, carrying the light and fine impurities in the grain material into the settling chamber through the impurity removal air duct. The inclined guide plate changes the flow direction of the airflow and the grain material, so that the light and fine impurities in the grain material are fully carried away by the airflow, and the removal of light and fine impurities is more thorough.

[0022] 5. This utility model has a simple structure, is easy to use, has low cost, and has a wide range of applications. It can effectively remove light and fine impurities from grain materials. The discharge port of this utility model can be connected to cleaning equipment such as primary cleaning screen and vibrating screen. After cleaning light and fine impurities, it can directly enter other cleaning equipment to clean heavy impurities in grain materials. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This utility model Figure 1 A schematic diagram of the right-side structure. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, a grain material suction pre-cleaning device includes a housing 1. A partition 3 is installed inside the housing 1, dividing the inner cavity of the housing 1 into a feeding chamber 2 and a settling chamber 4. The partition 3 includes an inclined lower guide section 31 and an arc-shaped section 32 connected to the upper end of the lower guide section 31. The arc-shaped section 32 covers the top of a separation cylinder 6, forming a dust removal duct 5 between the arc-shaped section 32 and the top plate of the housing 1. The volume of the dust removal duct 5 is smaller than the volume of the settling chamber 4. The dust removal duct 5 connects the feeding chamber 2 and the settling chamber 4. The airflow velocity decreases after entering the settling chamber 4 through the dust removal duct 5. The settling chamber 4 contains a separation cylinder 6. The upper part of the partition 3 is located between the separation cylinder 6 and the top plate of the housing 1. The perimeter wall is densely provided with ventilation holes. The outer sides of the shell 1 are respectively provided with return air systems. The two return air systems are located at both ends of the separation cylinder 6. The return air system includes a centrifugal fan 7. The air inlet of the centrifugal fan 7 is connected to the inner cavity of the separation cylinder 6. The air outlet of the centrifugal fan 7 is connected to the return air port 9 on the shell 1 through the return air pipe 8 set outside the shell 1. The return air port 9 is set at the lower part of the feed chamber 2. The return air pipe 8 is connected to an air regulating device. The air regulating device includes an air regulating plate 20 and an air regulating handle 21. The air regulating plate 20 is set inside the return air pipe 8 and is rotatably connected to the return air pipe 8. The air regulating plate 20 is connected to the air regulating handle 21 set outside the return air pipe 8.

[0027] The top of the feeding chamber 2 is provided with a feeding inlet 10, and the bottom of the feeding chamber 2 is provided with a funnel-shaped discharge outlet 12. A windproof feeding device is provided on the discharge outlet 12. The discharge outlet 12 is located below the return air inlet 9. An inclined guide plate 15 is provided inside the feeding chamber 2, located above the return air inlet 9. A material leveling device 17 is provided inside the feeding chamber 2, located below the feeding inlet 10. The material leveling device 17 includes a material leveling power unit, a material leveling shaft, a first spiral blade 18, and a second spiral blade 19. The material leveling shaft runs along the length of the feeding chamber 2. The material is arranged in a 2-degree direction and is rotatably connected to the feeding chamber 2. The housing 1 is equipped with a material leveling power device, which is connected to the material leveling shaft to provide power for the rotation of the material leveling shaft. The material leveling shaft is provided with a first spiral blade 18 and a second spiral blade 19. The first spiral blade 18 is arranged from the middle of the material leveling shaft to one end of the material leveling shaft, and the second spiral blade 19 is arranged from the middle of the material leveling shaft to the other end of the material leveling shaft. The middle of the material leveling shaft is located below the feeding port 10, and the rotation direction of the first spiral blade 18 is opposite to that of the second spiral blade 19.

[0028] The lower end of the settling chamber 4 is provided with a conical collection chamber 13, which is connected to the discharge port 11. The collection chamber 13 is provided with a discharge auger 14 for conveying the light impurities collected in the collection chamber 13 to the discharge port 11. The discharge auger 14 is arranged along the length of the collection chamber 13.

[0029] In use, start the centrifugal fan 7 and the material leveling device. The material leveling device drives the material leveling shaft to rotate. The grain material enters from the feed inlet 10. Under the action of the first spiral blade 18 and the second spiral blade 19, the grain material is dispersed from the middle to both sides. Then, under the action of gravity, it flows from top to bottom along the feed chamber 2. Under the action of the centrifugal fan 7, the airflow enters from the return air inlet 9 at the bottom of the feed chamber 2. The return air inlet 9 is located on both sides of the shell 1. The airflow enters vertically from the outside to the inside from both sides of the shell 1 below the guide plate 15. Under the action of the guide plate 15, the airflow changes direction and is directed to the lowest end of the guide plate 15 and the partition. The dispersed grain material flows in the direction of the gap between the 3. After falling on the upper surface of the guide plate 15, it flows downward along the guide plate 15 at an angle. The flow is downward at the lowest end of the guide plate 15. At the gap between the lowest end of the guide plate 15 and the partition 3, the airflow collides perpendicularly with the grain material flow from the side. The light and fine impurities in the grain material are carried by the airflow. The airflow carrying the light and fine impurities enters the settling chamber 4 through the impurity removal duct 5, realizing the separation of the light and fine impurities from the grain material. The grain material after removing the light and fine impurities flows downward along the guide plate 15. After opening the windproof unloading device 16, the grain material is discharged from the outlet 12.

[0030] The airflow entering the settling chamber 4 through the impurity removal duct 5 has a smaller volume than the settling chamber 4. Due to the increased space, the airflow velocity decreases, and the light and fine impurities carried in the airflow settle in the settling chamber 4 under the action of gravity. They are then collected by the conical impurity collection cavity 13. The impurity discharge auger 14 is activated to transport the collected light and fine impurities to the impurity outlet 11 for discharge, thus achieving the cleaning and removal of light and fine impurities from the grain material.

[0031] Under the action of centrifugal fan 7, the airflow entering the settling chamber 4 enters the inner cavity of the separation cylinder 6 through the ventilation hole on the separation cylinder 6, and then flows along the inner cavity of the separation cylinder 6. It enters from the air inlet of centrifugal fan 7 and from the air outlet of centrifugal fan 7 into the return air duct 8. Then, it re-enters the lower part of the feeding chamber 2 from the return air inlet 9 on the shell 1 along the return air duct 8, thus realizing the circulation of airflow.

[0032] This invention can also have densely arranged ventilation holes on the guide plate 15. After the airflow enters from the return air inlet 9, part of the airflow is diverted and flows upward through the gap between the lowest end of the guide plate 15 and the partition plate 3. Another part of the airflow can flow upward through the ventilation holes on the guide plate 15, which can make the airflow contact the grain material more fully and remove the light and fine impurities in the grain material more fully.

[0033] 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 suction pre-cleaning device for grain material, characterized in that: Includes a shell (1), and a partition (3) is provided inside the shell (1). The partition (3) divides the inner cavity of the shell (1) into a feeding chamber (2) and a settling chamber (4). A cleaning air duct (5) is formed between the upper part of the partition (3) and the top plate of the shell (1). The cleaning air duct (5) connects the feeding chamber (2) and the settling chamber (4). The airflow velocity decreases after entering the settling chamber (4) through the cleaning air duct (5). The settling chamber (4) is equipped with a separation cylinder (6), and the upper part of the partition plate (3) is located between the separation cylinder (6) and the top plate of the shell (1). The peripheral wall of the separation cylinder (6) is densely provided with ventilation holes. A return air system is provided on the outside of the housing (1). The return air system includes a centrifugal fan (7). The air inlet of the centrifugal fan (7) is connected to the inner cavity of the separator (6). The air outlet of the centrifugal fan (7) is connected to the return air port (9) on the housing (1) through a return air pipe (8) provided outside the housing (1). The return air port (9) is located at the lower part of the feed chamber (2). The top of the feeding chamber (2) is provided with a feeding port (10), and the bottom of the feeding chamber (2) is provided with a funnel-shaped discharge port (12). The discharge port (12) is located below the return air port (9). The lower end of the settling chamber (4) is provided with a conical collection cavity (13), which is connected to the discharge port (11).

2. The grain material suction pre-cleaning device according to claim 1, characterized in that: The collection chamber (13) is equipped with a discharge auger (14) for transporting the light impurities collected in the collection chamber (13) to the discharge port (11). The discharge auger (14) is arranged along the length of the collection chamber (13).

3. The aspirating pre-cleaning device of claim 1, wherein: The feed chamber (2) is provided with an inclined guide plate (15). The guide plate (15) is inclined downward along the direction from the feed inlet (10) to the partition (3). The guide plate (15) is covered and set above the return air inlet (9).

4. The aspirating pre-cleaning device of claim 1, wherein: The partition (3) includes an inclined lower guide section (31) and an arc-shaped section (32) connected to the upper end of the lower guide section (31), the arc-shaped section (32) covering the top of the separation cylinder (6).

5. The aspirating pre-cleaning device of claim 1, wherein: The discharge port (12) is equipped with a windproof unloading device (16).

6. The aspirating pre-cleaning device of claim 1, wherein: A return air system is provided on the outer shell (1) at both ends of the separator (6).

7. The grain material suction pre-cleaning device according to any one of claims 1 to 6, characterized in that: It also includes a material leveling device (17), which is set in the feeding chamber (2) and arranged below the feeding port (10). The material leveling device (17) includes a material leveling power device, a material leveling shaft, a first spiral blade (18) and a second spiral blade (19). The material leveling shaft is arranged along the length of the feeding chamber (2) and is rotatably connected to the feeding chamber (2). The housing (1) is provided with a material leveling power device, which is connected to the material leveling shaft to provide power for the rotation of the material leveling shaft. The material leveling shaft is provided with a first spiral blade (18) and a second spiral blade (19). The first spiral blade (18) is arranged from the middle of the material leveling shaft to one end of the material leveling shaft, and the second spiral blade (19) is arranged from the middle of the material leveling shaft to the other end of the material leveling shaft. The middle of the material leveling shaft is located below the feeding port (10). The rotation direction of the first spiral blade (18) is opposite to that of the second spiral blade (19).

8. The aspirating pre-cleaning device of any one of claims 1 to 6, wherein: It also includes an air regulating device, which is connected to the return air duct (8). The air regulating device includes an air regulating plate (20) and an air regulating handle (21). The air regulating plate (20) is set inside the return air duct (8) and is rotatably connected to the return air duct (8). The air regulating plate (20) is connected to the air regulating handle (21) set outside the return air duct (8).

Images