Automatic cleaning and screening system

Abstract

The invention relates to the field of crushing equipment, in particular to an automatic cleaning and screening system which comprises a rotatable screen drum provided with screen holes, and is characterized in that a plurality of material guide plates are arranged on the outer surface side of the screen drum in the circumferential direction at intervals, and a material passing gap is formed between every two adjacent material guide plates; the material guide plate is movably connected with the screen drum, and when the material guide plate rotates to the lower side of the center of the screen drum, the material guide plate can deviate from the screen drum to move to a material guide position under the action of self weight, so that a gap is formed between the material guide plate and the screen drum; and when rotating to the upper side of the center of the screen drum, the guide plate can move towards the surface side of the screen drum under the action of self weight. By arranging the movable material guide plate, the problems existing in the prior art are effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of crushing equipment, and particularly to an automatic cleaning and screening system. Background Art

[0002] The drum screen is a common garbage screening and processing device. The drum screen relies on the rotation of the rotatable screen cylinder to let some garbage fall from the barrel wall of the screen cylinder, and the large garbage is discharged from the end of the inner cavity of the drum screen. A common drum screen is a vibrating drum screen with an adjustable inclination angle and self-cleaning function disclosed in the patent with the publication number CN221934592U.

[0003] Since some garbage often contains rod-shaped objects, such as construction waste containing steel bars and iron bars, this part of the rod-shaped garbage needs to be discharged through the inner cavity of the drum during recycling. However, some rod-shaped garbage falls through the screen holes of the screen cylinder, and some rod-shaped objects get stuck in the screen holes after inserting a certain length into the screen holes. This not only causes poor garbage flow, but also the rod-shaped objects are prone to damage the cleaning tools when using conventional cleaning tools such as rotary brushes or rubber sheets to clean the screen holes.

[0004] Based on the above problems, the present application proposes an automatic cleaning and screening system. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an automatic cleaning and screening system, which effectively solves the problems existing in the prior art by setting a movable guide plate.

[0006] In order to solve the above problems, the present invention provides an automatic cleaning and screening system, including a rotatable screen cylinder provided with screen holes. The outer surface of the screen cylinder is provided with a plurality of guide plates at intervals along its circumferential direction, and there is a material passing gap between adjacent guide plates; the guide plates are movably connected to the screen cylinder, and when the guide plates rotate to the lower side of the center of the screen cylinder, they can move away from the screen cylinder to the guiding position under the action of their own weight, so that there is a gap between the guide plates and the screen cylinder; when the guide plates rotate to the upper side of the center of the screen cylinder, they can move towards the outer surface of the screen cylinder under the action of their own weight.

[0007] Further, first guiding parts are respectively provided at both ends of the guide plate in the axial direction of the screen cylinder, and second guiding parts are provided at the positions of the screen cylinder corresponding to the first guiding parts, and the first guiding parts can be slidably matched with the second guiding parts.

[0008] Furthermore, a limiting portion is formed at the outer end of the second guide portion, and the limiting portion is provided with a supporting surface. The limiting portion is provided with a limiting block on the side of the supporting surface away from the rotation direction of the screen drum, and the supporting surface extends toward the center of the screen drum along the direction away from the limiting block; when the material guide plate rotates to the lower side of the center of the screen drum, the first guide portion can move to the position of the supporting surface, and when the material guide plate rotates to the upper side of the center of the screen drum, the second guide portion can be driven to move along the supporting surface toward the screen drum under the action of the material guide plate's own weight.

[0009] Furthermore, the guide plate and the screen drum are connected by a connecting rope.

[0010] Furthermore, the first guide portion is configured as a guide ring, and the second guide portion is configured as a guide rod.

[0011] Furthermore, the side of the guide rod away from the limit block gradually extends from the inside to the outside toward the limit block.

[0012] Furthermore, the material guide plate is respectively provided with the first guide parts at both ends of the circumferential direction of the screen drum, and in the second guide parts at both ends of the same material guide plate along the circumferential direction of the screen drum, the length of the support surface of the second guide part located on one side of the rotation direction of the screen drum is greater than the length of the support surface of the second guide part on the other side.

[0013] Furthermore, the screen drum is provided with a material baffle at the position of the material passing gap.

[0014] Furthermore, the screen drum is provided with a plurality of separation rings at intervals along its axial direction, and an installation space is formed between two adjacent separation rings. The screen drum is provided with the guide plates at intervals along its circumferential direction in the installation space.

[0015] Furthermore, counterweight blocks are respectively provided at both ends of the guide plate along the circumferential direction of the screen drum.

[0016] The beneficial effect of the present invention is that, by providing a movable material guide plate, the problems existing in the prior art are effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0019] Figure 2 for Figure 1Schematic diagram of the partial structure of the illustrated embodiment at two guide plate positions (one guide plate is removed for display).

[0020] Figure 3 For the present invention in Figure 1 Schematic diagram of the side sectional structure of the sieve cylinder of the illustrated embodiment at the guide ring position.

[0021] Figure 4 Is Figure 3 Partial enlarged structure diagram at location A in

[0022] Figure 5 Is Figure 4 Partial enlarged structure diagram at location B in

[0023] Wherein: 1, sieve cylinder; 2, guide plate; 3, limiting part; 301, supporting surface; 4, limiting block; 5, connecting rope; 6, guide ring; 7, guide rod; 8, baffle plate; 9, partition ring; 10, counterweight block. Specific embodiments

[0024] In order to more clearly illustrate the overall concept of the present invention, the following will be further described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0025] It should be noted that many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0026] In addition, in the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication between two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and only a connection structure is used to connect them to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0029] In the present invention, as Figures 1-5 shown, an automatic cleaning and screening system is provided, including a rotatable screening cylinder 1, the screening cylinder 1 is provided with screening holes, and a plurality of guide plates 2 are arranged at intervals along the circumferential direction on the outer surface side of the screening cylinder 1, and there is a material passing gap between adjacent guide plates; the guide plate 2 is arranged to be movably connected with the screening cylinder 1, and when the guide plate 2 rotates to the lower side of the center of the screening cylinder 1, it can move away from the screening cylinder 1 under its own weight to the guiding position, so that there is a gap between the guide plate 2 and the screening cylinder 1; when the guide plate 2 rotates to the upper side of the center of the screening cylinder 1, it can move towards the outer surface side of the screening cylinder 1 under its own weight.

[0030] When the screening system of the present invention is in use, garbage is put into one end of the screening cylinder 1, and the garbage gradually moves towards the other end during the rotation of the screening cylinder 1. When the guide plate 2 follows the screening cylinder 1 and rotates to the lower side of the center of the screening cylinder 1, as Figure 3 and Figure 5 shown, a space is formed between the guide plate 2 and the outer surface of the screening cylinder 1. At this time, the garbage screened out from the screening cylinder 1 falls on the guide plate 2 and then moves along the inner surface of the guide plate 2 and drops. Part of the rod-shaped objects protrude from the screening holes at the position of the guide plate 2 and abut against the guide plate 2, so that the guide plate can prevent the rod-shaped objects from further protruding and dropping. When the guide plate 2 rotates to the upper side of the center of the screening cylinder 1, as Figure 3 and Figure 4 shown, the guide plate 2 moves towards the outer surface side of the screening cylinder 1 under its own weight. For part of the rod-shaped objects stuck in the screening holes, the guide plate 2 can push the rod-shaped objects towards the inner side of the screening cylinder 1 during the movement, so as to realize the cleaning of the screening cylinder 1.

[0031] The automatic cleaning screening system of the present invention, by providing a movable guide plate 2, can drive the guide plate 2 to move closer to or away from the screening cylinder 1 with the rotation of the screening cylinder 1 by the self-weight of the guide plate 2, and further can realize the cleaning of the rod-shaped objects stuck in the screening holes through the movement of the guide plate 2.

[0032] In a preferred embodiment, for the structure of the present invention, further specifically, the guide plate 2 is provided with a first guide portion at both ends of the axial direction of the screen drum 1, and the screen drum 1 is provided with a second guide portion at a position corresponding to the first guide portion, and the first guide portion can be slidably matched with the second guide portion. By providing the first guide portion and the second guide portion, the second guide portion can be used to guide the movement of the first guide portion, so that the guide plate 2 can move more regularly.

[0033] exist Figure 1 In the embodiment shown, for the structure of the present invention, more specifically, the first guide portion is configured as a guide ring 6, and the second guide portion is configured as a guide rod 7. Figure 2 and Figure 3 , Figure 4 As shown, one end of the guide rod 7 is connected to the screen drum 1, the guide plate 2 is opened to form a guide ring 6, and the counterweight block is provided with a through hole connected to the guide ring, so that it can move in the guide ring 6 through the guide rod 7 to guide the movement of the guide plate 2.

[0034] The arrangement of the first guide portion and the second guide portion is not limited to the structural form of the guide rod 7 and the guide ring 6. In replaceable embodiments, other forms may also be used. For example, the screen drum 1 is provided with separating rings 9 at both ends of the guide plate 2, the separating rings 9 are provided with slide grooves, the guide plate 2 is provided with sliders, and the sliders are slidably installed in the slide grooves.

[0035] In a preferred embodiment, for the structure of the present invention, to be more specific, a limiting portion 3 is formed at the outer end of the second guide portion, and the limiting portion 3 is provided with a supporting surface 301, and the limiting portion 3 is provided with a limiting block 4 on the side of the supporting surface 301 away from the rotation direction of the screen drum 1, and the supporting surface 301 extends toward the center of the screen drum 1 along the direction away from the limiting block 4; when the guide plate 2 rotates to the lower side of the center of the screen drum 1, the first guide portion can move to the position of the supporting surface 301, and when the guide plate 2 rotates to the upper side of the center of the screen drum 1, the second guide portion can be driven to move along the supporting surface 301 toward the screen drum 1 under the action of its own weight.

[0036] Combination Figure 1 In the embodiment shown, the present inventors provide a support surface 301, and further specifically, as shown in FIG. Figure 2 and 3 As shown, a convex limiting portion 3 is formed at the outer end of the guide rod 7, and a portion of the guide rod 7 located outside the limiting portion 3 forms a limiting block 4. Figure 3 and Figure 4As shown, during the rotation of the material guiding plate 2 from the lower central region of the screening cylinder 1 to the upper central region of the screening cylinder 1, the edge of the guiding ring 6 gradually moves to the position of the supporting surface 301. The supporting surface 301 plays a limiting role on the guiding ring 6, so as to keep a certain gap between the material guiding plate 2 and the screening cylinder 1, and then maintain the space between the material guiding plate 2 and the screening cylinder 1, so as to facilitate the discharge of the screened residues at the material guiding plate 2, and also enable the continuous screening of the garbage in the corresponding area of the screening cylinder 1 where the material guiding plate 2 is located. In addition, during the rotation of the material guiding plate 2 to the upper side of the center of the screening cylinder 1, the supporting surface 301 can support the guiding ring 6 until the supporting surface 301 is inclined so that the material guiding plate 2 can move downward along the supporting surface 301 by its own weight. In this way, the material guiding plate 2 can rotate to a certain height and then move downward, which can make the falling process of the material guiding plate 2 move towards the screening cylinder 1 in a manner closer to vertical dropping, and then can increase the impact of the material guiding plate 2 on the screening cylinder 1, improve the cleaning ability of the material guiding plate 2 for some tightly stuck rod-shaped objects, and also can use the impact between the material guiding plate 2 and the screening cylinder 1 to clean other materials attached to the screening cylinder 1.

[0037] In addition, as Figure 1 In the embodiment shown, in order to enable the edge of the guiding ring 6 to move along the supporting surface 301, there is a gap between the inner surface of the guiding ring 6 and the guiding rod 7. Then when the material guiding plate 2 rotates to the position shown in Figure 5 As shown, the guiding ring 6 of the material guiding plate 2 abuts against the side of the guiding rod 7 away from the limiting part 3. When the material guiding plate 2 rotates to the lowest edge position of the screening cylinder 1, the material guiding plate 2 moves downward relative to the screening cylinder 1, so that relative rubbing occurs between the material guiding plate 2 and the screening cylinder 1, and then some materials stuck between the material guiding plate 2 and the screening cylinder 1 can be loosened and dropped.

[0038] Regarding the settings of the limiting part 3 and the supporting surface 301, the present invention is illustrated by the cooperation of the guiding ring 6 and the guiding rod 7 in the illustrated embodiment, which is not used as a limitation of the limiting part 3 and the supporting surface 301 of the present invention. In an alternative embodiment, it can also be set as follows. Specifically, the screening cylinder 1 is provided with a separating ring 9 at both ends of the material guiding plate 2. The separating ring 9 is provided with a sliding groove, and the material guiding plate 2 is provided with a sliding block. The sliding block is slidably installed in the sliding groove, and the limiting part 3 is arranged in the sliding groove.

[0039] In a preferred embodiment, for the structure of the present invention, further specifically, the material guiding plate is connected to the screening cylinder 1 through a connecting rope 5. As Figure 3As shown, by providing the connecting rope 5, the guide plate 2 can be limited by the connecting rope 5 when the guide plate 2 moves away from the screen cylinder 1. Using the connecting rope 5 to limit the guide plate 2 in the direction away from the screen cylinder 1 can reduce the influence of the connecting rope 5 on the degree of freedom of movement of the guide plate 2 when the guide plate 2 moves to the feeding position, making the movement of the guide plate 2 more flexible. When the guide plate 2 moves towards the screen cylinder 1, the connecting rope 5 can reduce the interference at the approaching position between the guide plate 2 and the screen cylinder 1. Regarding the setting of the connecting rope 5, preferably a steel wire rope can be used. For the connection of the connecting rope to the screen cylinder and the guide plate, preferably fixing holes can be provided on the guide plate and the screen cylinder, and fixed by bolting or riveting in the fixing holes.

[0040] In the illustrated embodiment, one end of the connecting rope 5 is connected to the partition ring 9, and the other end is connected to the guide plate 2 from the side of the guide plate 2.

[0041] In Figure 1 In the illustrated embodiment, for the structure of the present invention, more specifically, the side of the guide rod 7 away from the limit block 4 gradually extends towards the limit block 4 from the inside to the outside. As Figure 4 shown, a bevel edge is formed on the side of the guide rod 7 away from the limit block 4, so that after the guide plate 2 moves past the upper side area of the center of the screen cylinder 1 and is in the area as Figure 4 shown, the first guiding portion starts to move downward along the support surface 301, and one end of the guiding ring 6 away from the limiting portion 3 gradually approaches the bevel edge. By setting the bevel edge to be inclined, when the guide plate 2 is falling and the guiding ring 6 contacts the bevel edge, the bevel edge can be closer to the vertical state, thereby reducing the resistance to the falling of the guide plate 2 generated by the contact between the guiding ring 6 and the bevel edge.

[0042] In addition, by providing the bevel edge, when the guide plate 2 rotates downward from the upper side of the center of the screen cylinder 1, during the downward rotation of the guide plate 2 in the area as Figure 5 shown, the guiding ring 6 located on the lower side moves outward first under the action of gravity, and the guiding ring 6 located on the upper side is supported by the bevel edge and lags behind the position of the lower guiding ring 6 to open, thereby making the guide plate 2 gradually open. During this process, a larger inclination angle can be maintained for the upper half of the guide plate 2 to facilitate the rapid discharge of the screened materials on the guide plate 2. When the upper guiding ring 6 moves backward, radial and circumferential fluctuations of the guide plate 2 along the screen cylinder 1 can be formed, which can facilitate the discharge of some materials stuck between the guide plate 2 and the partition ring 9, and can also drive the dislocation of some rod-shaped objects in contact with the guide plate 2 to dredge the garbage in the screen holes of the rod-shaped objects, reducing the possibility of the rod-shaped objects being stuck in the screen holes, so as to facilitate the retraction of the rod-shaped objects back to the inside of the screen cylinder 1.

[0043] In Figure 1In the shown embodiment, for the structure of the present invention, to be more specific, the guide plate 2 is respectively provided with the first guide portion at both ends of the sieve drum 1 in the circumferential direction, and in the second guide portions at both ends of the same guide plate 2 in the circumferential direction of the sieve drum 1, the length of the support surface of the second guide portion on one side of the rotation direction of the sieve drum 1 is greater than the length of the support surface 301 of the second guide portion on the other side.

[0044] like Figure 4 As shown, the guide plate 2 can be constrained by the guide rods 7 at the two circumferential ends of the screen drum 1, and the length of the support surface 301 at the right end of the guide plate 2 is smaller than the length of the support surface 301 at the left end of the guide plate 2. By differentially setting the lengths of the support surfaces 301 at the two ends of the guide plate 2, when the guide plate 2 rotates through the middle position of the top of the screen drum 1, during the overall rightward movement of the guide plate 2 relative to the screen drum 1, the first guide portion at the right end of the guide plate 2 is first separated from the support surface 301 at the corresponding position, and the left end of the guide plate 2 is separated from the support surface 301 at the corresponding position. The first guide at the position is separated from the support surface 301 at the corresponding position, so that the right end of the guide plate 2 moves toward the surface side of the screen drum 1 first, and the left end moves toward the surface side of the screen drum 1 later, so that the right section of the guide plate 2 first contacts the rod-shaped object stuck at the corresponding position of the screen hole and pushes it into the screen drum 1, and then the left section of the guide plate 2 contacts the rod-shaped object stuck at the corresponding position of the screen hole and pushes the rod-shaped object into the screen drum 1. In this process, accompanied by the rightward displacement of the guide plate 2 relative to the screen drum 1, the rod-shaped object can be further driven to move horizontally to promote the loosening of the rod-shaped object in the screen hole. It can be seen that when the guide plate 2 of the present invention falls from the top center area of the screen drum 1, the left and right sections can fall in succession, and the rod-shaped object in the screen hole can be frustrated during the falling process of the right end of the guide plate 2 to promote the rod-shaped object to enter the screen drum 1. The two ends of the guide plate 2 fall alternately to achieve two impacts on the screen drum 1, so as to further promote the garbage stuck in the screen hole to fall off. Moreover, the two sections of the guide plate 2 fall down separately, so that the corresponding rod-shaped objects at the two sections of the guide plate 2 are alternately pressed into the inner side of the screen drum 1, which can prevent the guide plate 2 from being supported by rod-shaped objects at the left and right sections.

[0045] Moreover, in Figure 1 In the embodiment shown, Figure 4 and 5 As shown, the guide plate 2 is provided with counterweight blocks 10 at both ends along the circumferential direction of the screen drum 1. Figure 4As shown in the figure, strip-shaped counterweights 10 are respectively provided at both ends of the material guide plate 2, which can not only form a strengthening structure for the end of the material guide plate 2, but also increase the overall torque of the right section of the material guide plate 2 to rotate downward (the whole material guide plate 2 rotates approximately with the part where the left end of the material guide plate 2 is located on the support surface 301 as the axis) when the right end of the material guide plate 2 moves downward first. By analogy, when the left end of the material guide plate 2 starts to fall, such a setting can also increase the rotational torque of the left section of the material guide plate 2 to rotate downward (the whole material guide plate 2 rotates approximately with the part of the right end of the material guide plate 2 as the axis of rotation), so as to further improve the pushing effect of the material guide plate 2 on the rod-shaped object.

[0046] In the illustrated embodiment, for the structure of the present invention, more specifically, a plurality of partition rings 9 are provided at intervals along the axial direction of the sieve cylinder 1, and an installation space is formed between two adjacent partition rings 9. The material guide plates 2 are installed at intervals along the circumferential direction of the sieve cylinder 1 in the installation space.

[0047] As Figure 3 shown, by adopting the setting method of a plurality of partition rings 9, the length of a single material guide plate 2 can be reduced, making the movement of the material guide plate 2 more flexible. It can also make the plurality of material guide plates 2 in the middle area at the top of the sieve cylinder 1 fall and contact the sieve cylinder 1 respectively, so that the sieve cylinder 1 is vibrated by continuous impacts to further promote the shedding of the stuck objects in the sieve holes.

[0048] In a preferred embodiment, for the structure of the present invention, more specifically, a baffle plate 8 is provided at the position of the material passing gap of the sieve cylinder 1.

[0049] As shown in the figure, the extending direction of the baffle plate is substantially the same as the axial direction of the sieve cylinder 1, so that when the sifted material at the position of the material guide plate 2 in the lower half area of the sieve cylinder 1 falls, the baffle plate can guide the sifted material dropped by the upper material guide plate 2 to fall, so as to prevent the secondary sifted material from entering between the lower material guide plate 2 and the sieve cylinder 1.

[0050] Each embodiment in the specification is described in a progressive manner. The same or similar parts between each embodiment can be referred to each other, and the key points of each embodiment are the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

[0051] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An automatic cleaning and screening system, comprising a rotatable screening cylinder provided with screening holes, characterized in that, The outer side of the screen drum is provided with a plurality of material guide plates spaced apart along its circumference, and there is a material passing gap between adjacent material guide plates; the material guide plates and the screen drum are movably connected, and when the material guide plates rotate to the lower side of the center of the screen drum, they can move away from the screen drum to the material guiding position under the action of their own weight, so that there is a gap between the material guide plates and the screen drum; when the material guide plates rotate to the upper side of the center of the screen drum, they can move toward the outer side of the screen drum under the action of their own weight.

2. The automatic cleaning and screening system according to claim 1, wherein The material guide plate is provided with first guide parts at both ends of the screen drum in the axial direction, respectively. The screen drum is provided with second guide parts at positions corresponding to the first guide parts. The first guide parts can be slidably matched with the second guide parts.

3. The automatic cleaning and screening system according to claim 2, characterized in that, A limiting portion is formed at the outer end of the second guide portion, the limiting portion is provided with a supporting surface, the limiting portion is provided with a limiting block on the side of the supporting surface away from the rotation direction of the screen drum, and the supporting surface extends toward the center direction of the screen drum in a direction away from the limiting block; When the guide plate rotates to the lower side of the center of the screen drum, the first guide part can move to the support surface position. When the guide plate rotates to the upper side of the center of the screen drum, the second guide part can be driven to move along the support surface toward the screen drum under the action of its own weight.

4. The automatic cleaning and screening system according to any one of claims 1 to 3, characterized in that, The material guide plate and the screen drum are connected via a connecting rope.

5. The automatic cleaning and screening system according to claim 3, characterized in that The first guide portion is configured as a guide ring, and the second guide portion is configured as a guide rod.

6. The automatic cleaning and screening system according to claim 5, characterized in that The side of the guide rod away from the limiting block gradually extends from the inside to the outside towards the limiting block.

7. The automatic cleaning and screening system according to claim 3, characterized in that The material guide plate is respectively provided with the first guide parts at both ends of the circumferential direction of the screen drum. In the second guide parts at both ends of the same material guide plate along the circumferential direction of the screen drum, the length of the support surface of the second guide part on one side of the rotation direction of the screen drum is greater than the length of the support surface of the second guide part on the other side.

8. The automatic cleaning and screening system according to claim 4, wherein, The screen drum is provided with a material blocking plate at the position of the material passing gap.

9. The automatic cleaning and screening system according to claim 1, characterized in that, The screen drum is provided with a plurality of separation rings at intervals along its axial direction, and an installation space is formed between two adjacent separation rings. The screen drum is provided with the guide plates at intervals along its circumferential direction in the installation space.

10. The automatic cleaning and screening system according to claim 7, wherein, The two ends of the guide plate along the circumferential direction of the screen drum are respectively provided with counterweight blocks.

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