An automated material screening and impurity removal device

Abstract

The application provides an automatic material screening and impurity removing equipment, which comprises a box body, a blowing device, a dust collector and a rotating drum. The lower end of the rotating drum is provided with a discharge hopper, the upper end is provided with a feeding hopper, and a feeding trolley is arranged on the outer side and corresponds to the discharge hopper. The inside of the box body is provided with left and right partition plates, the end of the partition plate is provided with a transition pad, a plurality of air passing grooves are arranged on the rotating drum, a plurality of screening mechanisms are arranged in the rotating drum at intervals, a screening cavity is formed on the feeding side of each screening mechanism, the screening mechanism comprises a feeding end screen and a discharging end screen, and a flexible transition structure is arranged between the feeding end screen and the discharging end screen. A material guiding plate is arranged in the rotating drum, the surface of the material guiding plate is provided with a plate surface material disturbing structure, and a drum wall material disturbing structure is arranged on the inner wall of the rotating drum. The dust and light impurities brought out after the rotating drum are adsorbed by the dust collector, the dust and impurity removing efficiency is high, the screening and removing are sequentially performed by the multi-stage screening mechanism, the dust and impurity removing effect of the screened raw material is very good, the cost is low, the operation is simple, and the work is stable and reliable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automatic processing equipment, and in particular relates to an automatic material screening and impurity removing device. BACKGROUND

[0002] In daily life, ordinary individual farmers often need to screen and remove impurities when harvesting crops or agricultural and sideline products. For example, sunflower seeds peeled off by farmers during harvesting often contain broken leaves, floating skins and dust, which need to be screened out. Otherwise, after being fried into melon seeds, the appearance is poor and not very sanitary, affecting consumption. The traditional method of removing dust and screening used by farmers is to use a dustpan and other tools to lift the material and blow it with wind to remove dust and lighter impurities. However, the efficiency is low, the labor intensity is high, and it takes several hours to process several dozen kilograms of crops. The cleaning and screening effect is not ideal.

[0003] Although there are automatic screening devices in the prior art, the structures are mostly complex, and the impurity removal effect is not ideal. For example, the shaking dust removal device for melon seed processing disclosed in Chinese patent CN217569678U uses the blowing action of the first air blower to blow the lighter impurities and dust falling down to the second air blower, and sets a filter screen to assist in cleaning dust. The dust removal device for melon seed production disclosed in Chinese patent CN111014031B blows away dust by moving the piston plate left and right through the forward and reverse rotation of the motor, and cooperating with the piston cylinder check valve. The lighter impurities or empty shells are blown away by the airflow by manually actuating the lifting rod through the pull ring to make the material plate vibrate to produce stratification. The operation is very complex and time-consuming and labor-intensive. The structures of the above two patents are complex, the operation control is complicated, and the reliability, convenience and screening effect of the raw materials are not ideal.

[0004] Especially for individual farmers, the planting quantity is small, and the added value of these crops or agricultural and sideline products is also small. If the above-mentioned equipment is purchased, the economic cost investment is too large, and the farmers are reluctant to purchase at a high price, so the degree of mechanization is low in small batch production. In addition, it should be pointed out that not only melon seed production, but also crops and agricultural and sideline products such as peanuts, wheat and soybeans all have the actual need to screen out dust and floating skin impurities. Therefore, it is necessary to design a dust removal device that is suitable for ordinary individual farmers, has low cost, simple operation and good use effect. SUMMARY

[0005] The problem to be solved by the present application is to overcome the defects in the prior art, and to provide an automatic material screening and impurity removing device.

[0006] To solve the above technical problems, the technical scheme of the present application is realized as follows:

[0007] An automatic material screening and impurity removing equipment comprises a box body, an air supply device, a dust collector, and a rotating drum obliquely installed in the box body, wherein the lower end of the rotating drum is provided with a discharge hopper, the upper end of the rotating drum is provided with a feeding hopper, and a feeding trolley is arranged outside the box body and corresponds to the discharge hopper.

[0008] The box body is internally provided with a left partition plate and a right partition plate, and transition pads are arranged at the ends of the left partition plate and the right partition plate and are attached to the rotating drum, so that a lower chamber is formed at the lower side of the rotating drum and an upper chamber is formed at the upper side of the rotating drum in the box body.

[0009] The lower part of the box body is provided with at least one air inlet communicating with the lower chamber, and an air inlet pipe is installed on the air inlet and is connected with the air supply pipeline of the air supply device.

[0010] The rotating drum is internally provided with a plurality of screening mechanisms at intervals, and each screening mechanism forms a screening chamber at the material inlet side.

[0011] Meanwhile, a material guide plate is arranged on the inner wall of the rotating drum and is close to each air passage and on the same side of the air passage, and a plate disturbance structure is arranged on the surface of the material guide plate which is different from the air passage corresponding to the material guide plate.

[0012] Further, the flexible transition structure comprises a corrugated pipe between the outlet end of the material inlet cylinder and the inlet end of the material outlet bag.

[0013] Further, the corrugated pipe is conical as a whole.

[0014] Further, the inclination angle of the top plate of the box body is consistent with that of the rotating drum.

[0015] Further, the lower end of the feeding trolley is provided with traveling wheels, and a hand pushing rod is installed on the feeding trolley.

[0016] Further, the left partition plate is installed on the left wall plate of the box body, and the right partition plate is installed on the right wall plate of the box body.

[0017] Furthermore, the lower part of the box is equipped with a slag drawer that can be pulled out to one side of the feeding trolley. The end of the slag drawer is provided with a head plate, a handle is provided on the outer surface of the head plate, and a sealing gasket that fits into the box is provided on the inner surface of the head plate. Under normal conditions, the head plate can be fixed to the box by a connector. The connector can be removed periodically, and the slag drawer can be pulled out to clean the slag that has fallen into the slag drawer.

[0018] Furthermore, the inlet end of the feed cylinder is provided with a connecting rim, which is detachably connected and fixed to the rotating cylinder by a connector.

[0019] Furthermore, the transition pad can be detachably installed on the left / right partition, or the transition pad can be glued to the left / right partition.

[0020] The advantages and positive effects of this invention are:

[0021] This invention features a compact structure, simple operation, and a single rotating drum as its main component. It boasts low cost, long service life, stable and reliable operation, and minimal economic investment. Therefore, this type of miniaturized, low-purchase-cost machinery is ideal for small-batch cleaning of agricultural crops or by-products. Air supplied to the lower chamber enters the rotating drum through an air duct located within the lower chamber, and then enters the upper chamber through an air duct located within the upper chamber. The material inside the rotating drum is constantly subjected to airflow. Dust and lighter impurities carried through the rotating drum are absorbed by a vacuum cleaner and then sieved out in stages by a multi-stage screening mechanism, resulting in high dust and impurity removal efficiency and excellent cleaning effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure created by the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of the structure when the drawer containing impurities is pulled out;

[0024] Figure 3 This is a schematic diagram of the transfer cylinder part created in this invention;

[0025] Figure 4 This is a cross-sectional view of the transfer cylinder portion created in this invention;

[0026] Figure 5 This is a schematic diagram of the screening mechanism in this invention;

[0027] Figure 6 This is a partial structural diagram of the transfer cylinder created in this invention;

[0028] Figure 7 This is a schematic diagram of the inner wall of the transfer cylinder in this invention;

[0029] Figure 8 This is a schematic diagram of the invention with a partition plate and a mating seat;

[0030] Figure 9 This is a cross-sectional view of the rotating cylinder with partition plates in this invention.

[0031] Figure 10 This is a schematic diagram of the installation arrangement of the transfer cylinder and the left and right partitions in this invention;

[0032] Figure 11 yes Figure 10 A schematic diagram after removing the rotating drum;

[0033] Figure 12 yes Figure 10 A schematic diagram showing a partition plate and a mating seat;

[0034] Figure 13 yes Figure 12 A schematic diagram after removing the rotating drum. Detailed Implementation

[0035] It should be noted that, without conflict, the embodiments and features in the embodiments of this invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation on this invention. Furthermore, 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 indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The specific embodiments of the present invention will be described in detail below.

[0039] An automated material screening and impurity removal device, such as Figures 1 to 13 As shown, the device includes a housing 1, an air supply device, a vacuum cleaner, and a rotating drum 2 installed at an angle inside the housing. The lower end of the rotating drum has a discharge hopper 3, and the upper end has a feed hopper 4. A feeding trolley 5 is located on the outside of the housing corresponding to the discharge hopper. For example, the air supply device can be a blower, and the vacuum cleaner can be an existing industrial vacuum cleaner. Those skilled in the art can choose their own air supply device and vacuum cleaner, as long as they meet the air supply / suction requirements of the housing. Since this is standard technology, it will not be elaborated further here. The housing has a left partition 6 and a right partition 7 inside. At the ends of both the left and right partitions, transition pads 8 are provided that fit against the rotating drum, creating a lower chamber 9 below the rotating drum and an upper chamber 10 above it. The upper and lower chambers are relatively independent.

[0040] Typically, the aforementioned transition pads can be detachably installed on the left / right partition, or the transition pads can be glued to the left / right partition. The lower part of the housing has at least one air inlet communicating with the lower chamber, and an air inlet pipe 12 is installed on the air inlet, which is connected to the air supply pipe of the air supply device 13. The upper part of the housing has several air outlets communicating with the upper chamber, and a suction pipe 14 is installed at each air outlet, which is connected to the suction pipe of a vacuum cleaner.

[0041] The rotating drum is provided with several screening mechanisms 15 at intervals, so that a screening chamber 16 is formed on the feed side of each screening mechanism. The screening mechanism includes an inlet screener 17 and an outlet screener 18, with a flexible transition structure 19 between them. The inlet screener includes an inlet cylinder 20 that is conical in shape, and the outlet screener includes an outlet bag 21 that is conical in shape (flexible). The outlet bag has an outlet at its end. The rotating cylinder is provided with several air passage slots 11. The air supplied by the air supply device to the lower chamber enters the rotating cylinder through the air passage slots in the rotating cylinder part inside the lower chamber, and then enters the upper chamber through the air passage slots in the rotating cylinder part inside the upper chamber. With the suction of the vacuum cleaner, the parts of the rotating cylinder in the lower and upper chambers change dynamically as the rotating cylinder rotates. The dust and lighter impurities carried out after passing through the inside of the rotating cylinder are adsorbed by the vacuum cleaner, resulting in high dust and impurity removal efficiency. Furthermore, the multi-stage screening mechanism removes dust and impurities in stages, resulting in excellent dust and impurity removal effect. A simple rotating cylinder can efficiently and effectively remove dust and impurities.

[0042] On the inner wall of the rotating drum, near each air passage and on the same side of the air passage, an inclined material guide plate 23 is arranged, which is arc-shaped, with the arc center on the side different from (the closest) the air passage, and a material disturbing structure 24 is arranged on the side surface of the material guide plate different from (the corresponding) air passage, and a drum wall material disturbing structure 25 is arranged on the inner wall of the rotating drum. During the rotation of the rotating drum, the material guide plate is used to guide the material to avoid the air passage, and the material passing through the material guide plate will be "thrown up" by the force, under the action of the air blowing at the lower part of the rotating drum and the air suction at the upper part, the dust and other impurities with light quality can be removed more efficiently, similar to the method of farmers using a dustpan to throw up the grain in a windy environment to remove the chaff and retain the useful part of the grain. The present application fully realizes automation, replaces manual operation, and the multiple air chambers of the present application can continuously remove impurities from the material, greatly enhancing the effect, greatly improving the work efficiency compared with the existing manual mode. As an example, the on-plate material disturbing structure includes a plurality of spaced-apart protruding columns, and the drum wall material disturbing structure includes a plurality of protruding multi-prism-shaped protrusions. Under the action of the air force, combined with the guiding effect of the material guide plate, the material is "thrown up", and combined with the dispersing effect of the drum wall material disturbing structure and the on-plate material disturbing structure on the material, the multi-dimensional dispersion of melon seed material can be effectively formed, greatly improving the removal effect and efficiency of dust and other impurities in the material, and ensuring the work efficiency and quality.

[0043] It should be noted that the above-mentioned "multi-dimensional dispersion" of the material refers to the directionally arbitrary turning and scattering of the melon seed material, i.e., when the melon seed material moves along the inner wall of the rotating drum, it will be blocked by the multi-prism-shaped drum wall material disturbing structure and then be dispersed, and when the material passes through the material guide plate, it will be dispersed by the on-plate material disturbing structure, and after passing through the material guide plate, the material will be "thrown up", and as the rotating drum rotates, the landing points of the material are different, the force directions of the material are different, and when the material falls to the inner wall of the rotating drum, it will also be dispersed by the drum wall material disturbing structure (at the position of the landing point) and the material guide plate (and the on-plate material disturbing structure), and after passing through multiple screening cavities, the material can be fully and thoroughly decontaminated. Of course, even if part of the material (particles) is thrown up and does not fall to the inner wall of the rotating drum, but is temporarily suspended in the air by the wind, the material (particles) will not be in a stationary state, but will be fully dispersed under the influence of the wind, and the decontamination effect can also be guaranteed, so from another angle, it can be explained that the present application actually relies less on the wind.

[0044] The flexible transition structure includes a bellows 22 between the outlet end of the feeding cylinder and the inlet end of the discharge cloth bag. Preferably, the bellows is conical as a whole, adapting to the shapes of the feeding end screen and the discharge end screen. The material enters the feeding side of the feeding end screen with a larger diameter, and then is discharged from the discharge side of the discharge end screen with a smaller diameter after passing through the flexible transition structure, and then enters the next stage screening chamber, and is sequentially screened and separated from impurities in each screening chamber, until being discharged from the discharge hopper of the rotating drum. It should be noted that the discharge cloth bag of the discharge end screen can trap the impurities with lighter weight floating on the surface of the material, and the end (i.e. the outlet end) of the discharge cloth bag is downwardly suspended due to the influence of gravity. As the rotating drum rotates, the material is dispersed and "flung" out of the outlet end of the discharge cloth bag, which effectively improves the dispersion degree of the material, lays a foundation for the next stage screening chamber to remove impurities from the raw material, effectively guarantees the impurity removal effect, and effectively removes dust and impurities under a simple and compact structure design (only the rotating drum needs to rotate), thereby improving the quality of the raw material.

[0045] It should be noted that the device does not require 100% removal of impurities. Even if part of the larger floating skin and other impurities are discharged from the drum under the layer-by-layer friction (trapping) effect of the discharge cloth bag, these impurities will mainly float on the surface of the material and be clearly visible to the naked eye, which can be easily removed. Compared with the manual removal of impurities and dust by using a dustpan, the efficiency is significantly improved, and the labor intensity is significantly reduced. Compared with the complex and high-cost impurity removal equipment in the prior art, the automatic material screening and impurity removal equipment provided by the present application has good economy, reliable work efficiency and use effect.

[0046] Generally, the top plate of the box body is consistent with the inclination angle of the rotating drum. The feeding trolley is provided with traveling wheels 26 at the lower end, and a hand pushing rod 27 is installed on the feeding trolley. The left partition plate is installed on the left wall plate 28 of the box body, and the right partition plate is installed on the right wall plate 29 of the box body. Preferably, on the side wall of the rotating drum, each screening chamber is correspondingly provided with an operating port for cleaning, and a cover plate is detachably installed on the operating port. By opening the cover plate, the internal screening chamber can be conveniently cleaned through the operating port. Alternatively, the feeding screen of the screening mechanism and the side wall of the rotating drum can be detachably installed, for example, a connecting eave 32 is arranged at the inlet end of the feeding cylinder, and the connecting eave is fixed to the rotating drum by connecting members (such as screws).

[0047] In an alternative embodiment, the lower part of the box is provided with a dirt drawer 30 which can be pulled out to the side of the feeding trolley. The end of the dirt drawer is provided with an end plate 31. A handle (not shown in the drawings) is provided on the outer surface of the end plate. The inner surface of the end plate is provided with a sealing gasket which is attached to the box. In normal conditions, the end plate can be fixed to the box by a connecting member. The connecting member can be removed periodically to pull out the dirt drawer and clean the dirt inside the dirt drawer. As the rotating drum rotates, the heavier and smaller particles (such as small stones) are allowed to fall from the air passage to the dirt drawer. It should be noted that the width of the air passage is designed to be wide enough to prevent the melon seeds from falling through. Under the influence of the air flow into the air passage, the melon seeds can be blown away from the lower part of the rotating drum. With proper design of the air flow, the melon seeds will have less contact with the rotating drum, which is more conducive to the removal of dust and other impurities in the melon seed material. The lighter impurities and empty shells are allowed to remain in the rotating drum, which only needs to be cleaned periodically.

[0048] The left and right partitions can be made of spring steel or stainless steel, allowing a small amount of deformation of the left and right partitions during the rotation of the drum, which is more adaptable. The material of the partitions has a certain elastic deformation capacity, which effectively ensures the sealing between the left and right partitions and the drum. In the structural design, the left and right partitions are arranged on the upper and lower sides of the drum and are diagonally arranged, i.e., when the left partition is at the upper left corner of the drum, the right partition is at the lower right corner of the drum. If the left partition is at the lower left corner of the drum, the right partition is at the upper right corner of the drum. In normal conditions, the left and right partitions exert a certain pre-pressing force on the surface of the drum, i.e., after the drum is assembled, the left and right partitions deform a certain amount, which rubs against the transition pad block as the drum rotates. Over a long period of use, as the transition pad block wears out, the partitions gradually recover from the deformation, which always ensures that the transition pad block is in contact with the surface of the drum, maintaining good sealing. This structural design ensures that the transition pad blocks on the two partitions diagonally arranged always maintain a state of contact with the drum.

[0049] The transition pad block is made of nylon or rubber, which can be replaced as a whole or repaired by bonding after wear. It should be noted that since the left and right partitions are made of materials that can elastically deform, as the transition pad block wears out, the partitions will adaptively deform, always ensuring that the transition pad block is pressed tightly against the surface of the drum. The transition pad block always fills the gap between the left and right partitions and the drum, allowing the drum to rotate smoothly while maximizing the relative independence of the upper and lower chambers.

[0050] In an alternative embodiment, a plurality of partition plates 33 are arranged at intervals on the outer wall of the drum, and a corresponding matching seat 34 is arranged on the top plate of the box body, and the matching seat is provided with a groove matched with the partition plate. In a further improved scheme, a sealing felt is arranged on the side wall of the groove, and as the drum rotates, the partition plate is dynamically inserted into the groove of the matching seat, and the partition plate on both sides is in contact with the sealing felt, improving the sealing performance. Furthermore, the upper chamber is divided into independent air chambers on both sides of the partition plate, that is, the upper chamber is divided into N+1 independent air chambers by the arrangement of N partition plates, so that the air chambers at each level can be independent during the rotation of the drum, improving the effect and efficiency of dust and impurities removal. As an example, the specific structure of the matching seat can be inverted U-shaped, such as Figure 12 and Figure 13 the matching seat form, so that the partition plate and the matching seat form a barrier together, and the upper chamber is divided into independent air chambers.

[0051] Preferably, there is an independent air chamber on the outer side of the drum corresponding to each screening mechanism, so that each screening chamber corresponding to each screening mechanism corresponds to an independent air chamber, ensuring that the dust in the screening chamber is adsorbed by the corresponding air chamber, and the screening chamber in the drum and the independent air chamber outside the drum corresponding to the screening chamber form a multi-stage screening operation mode, greatly improving the efficiency and effect of dust removal and impurity removal. Generally, the lower edge of the left and right sides of the matching seat is lower than the left and right partition plates, respectively. It should be noted that the left partition plate, the right partition plate (and the transition pad) are designed with a matching groove corresponding to the partition plate to ensure smooth passage of the partition plate, thereby ensuring smooth operation of the drum. Alternatively, the left and right partition plates are designed as a multi-flap structure, for example, the left partition plate is designed as a multi-flap left partition plate, and the left and right sides of the matching seat are respectively attached to the corresponding left partition plate. The side plate of the matching seat does not hinder the deformation of the left partition plate, and can also form a relatively sealed independent chamber with the left partition plate. Those skilled in the art can design and adjust the structure as needed. It should be noted that there is no need to ensure strict sealing between the partition plate and the matching seat. Each independent air chamber can establish a certain negative pressure, which is beneficial to the removal of dust and impurities. The partition plate (sub) and the transition pad do not need to be tightly matched with the drum. Generally, the upper chamber is divided into a plurality of independent air chambers, and at least one air outlet is arranged in each air chamber, and a suction pipe is installed on the air outlet. The suction pipe is connected to the suction pipe of the dust collector to remove dust and small particle size impurities.

[0052] It should be noted that the fundamental purpose of the design of the present impurity removal device is not to remove 100% of the impurities or dust, which is a function that ordinary devices cannot achieve. Such stringent operating standards are generally completed in the production lines of large enterprises, and the products produced are sold as high-end goods. However, ordinary farmers do not have the need and necessity for such extreme operating standards for self-consumption or self-sale at the rural market. Therefore, even after impurity removal by the present device, some residual floating skin and the like may still be present, which is mostly visible to the naked eye, and can be removed by manual picking or surface cleaning. The original intention of the present device is to solve the problem of large amount of manual labor and low efficiency of impurity removal, and to convert manual labor into automated mechanical operation. The development, manufacture and design of automated equipment technology is also the purpose and goal of the applicant's enterprise development.

[0053] The present invention has a compact structure design, simple operation, and the main component is a rotating drum, with low cost, long service life, stable and reliable working process, and low economic investment. Therefore, such small-sized low-purchasing-cost mechanical equipment is very suitable for small-batch crop or agricultural and sideline product impurity removal operation. The wind sent into the lower chamber will enter the rotating drum through the air passage in the rotating drum part inside the lower chamber, and then enter the upper chamber through the air passage in the rotating drum part inside the upper chamber. The material in the rotating drum will always be blown by the wind, and the dust and lighter impurities brought out after passing through the inside of the rotating drum will be adsorbed by the dust collector and screened out in stages by the multi-stage screening mechanism. The dust and impurity removal efficiency is high, and the dust and impurity removal effect is very good.

[0054] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0055] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be considered as limiting the claims involved.

[0056] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An automated material screening and impurity removal device, characterized in that: The box, air supply device, dust collector, and a rotating drum obliquely installed in the box are included, the lower end of the rotating drum is provided with a discharge hopper, the upper end is provided with a feeding hopper, and a feeding trolley is arranged outside the box corresponding to the discharge hopper; The left partition plate and the right partition plate are arranged inside the box, and transition pads are arranged at the ends of the left partition plate and the right partition plate and are attached to the rotating drum, so that the inside of the box is divided into a lower chamber at the lower side of the rotating drum and an upper chamber at the upper side, and the upper chamber is independent of the lower chamber; a plurality of air passing grooves are arranged on the rotating drum; At least one air inlet is arranged at the lower part of the box and is communicated with the lower chamber, an air inlet pipe is arranged on the air inlet, the air inlet pipe is connected with the air supply pipe of the air supply device, and a plurality of air outlets are arranged at the upper part of the box and are communicated with the upper chamber, air suction pipes are arranged at the air outlets, and the air suction pipes are connected with the air suction pipe of the dust collector; A plurality of screening mechanisms are arranged in the rotating drum, the screening mechanism includes an inlet end screen and an outlet end screen, and a flexible transition structure is arranged between the inlet end screen and the outlet end screen; the inlet end screen includes an inlet cylinder which is conical as a whole, the outlet end screen includes an outlet cloth bag which is conical as a whole, and the outlet end of the outlet cloth bag is provided with an outlet port; the outlet port at the outlet end of the outlet cloth bag is in a downwardly hanging posture, and as the rotating drum rotates, the material is thrown out from the outlet port of the outlet cloth bag; Meanwhile, a material guiding plate is arranged on the inner wall of the rotating drum and is close to each air passing groove and on the same side of the air passing groove, a plate disturbance structure is arranged on the surface of the material guiding plate which is different from the side of the air passing groove, a cylinder wall disturbance structure is arranged on the inner wall of the rotating drum, so that when the rotating drum rotates, the material is dispersed in multiple dimensions; A plurality of partition plates are arranged at intervals on the outer wall of the rotating drum, and a matching seat is arranged on the top plate of the box corresponding to each partition plate, a groove matched with the partition plate is arranged on the matching seat, a sealing felt is arranged on the side wall of the groove, as the rotating drum rotates, the partition plate is dynamically inserted into the groove of the matching seat, and the partition plate is in contact with the sealing felt on both sides, so that the upper chamber is divided into independent air chambers on both sides of the partition plate, and each screening mechanism is arranged corresponding to an independent air chamber.

2. The automated material screening and decontamination apparatus of claim 1, wherein: The flexible transition structure includes a bellows between the outlet end of the inlet cylinder and the inlet end of the outlet cloth bag.

3. The automated material screening and decontamination apparatus of claim 2, wherein: The bellows is conical as a whole.

4. The automated material screening and decontamination apparatus of claim 1, wherein: The inclination angle of the top plate of the box is consistent with that of the rotating drum.

5. The automated material screening and decontamination apparatus of claim 1, wherein: The lower end of the feeding trolley is provided with traveling wheels, and a hand pushing rod is arranged on the feeding trolley.

6. The automated material screening and decontamination apparatus of claim 1, wherein: The left partition plate is arranged on the left wall plate of the box, and the right partition plate is arranged on the right wall plate of the box.

7. The automated material screening and decontamination apparatus of claim 1, wherein: A foreign matter drawer is arranged at the lower part of the box and can be pulled out to one side of the feeding trolley, an end cap plate is arranged at the end of the foreign matter drawer, a handle is arranged on the outer surface of the end cap plate, and a sealing gasket is arranged on the inner surface of the end cap plate and is attached to the box.

8. The automated material screening and decontamination apparatus of claim 1, wherein: The inlet end of the inlet cylinder is provided with a connecting eave, and the connecting eave is fixed with the rotating drum through a connecting piece.

9. The automated material screening and decontamination apparatus of claim 1, wherein: The transition pad is detachably arranged on the left partition plate / right partition plate, or the transition pad is adhesively fixed on the left partition plate / right partition plate.

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