Roller screen device capable of automatically adjusting roller gap

Abstract

The application discloses a roller screening device capable of automatically adjusting roller gap, which comprises side helps, a plurality of rocker frames, reset members, a driving assembly, screening rollers and driving and passive chain rings.

Description

Technical Field

[0001] This invention patent relates to a roller screening device, specifically a roller screening device that can automatically adjust the roller gap, belonging to the technical field of auxiliary devices for tobacco pretreatment. Background Technology

[0002] Typically, in a tobacco leaf threshing and re-drying production line, the roller screens in a roller-type sand screening machine are fixed to the side walls, with equal roller spacing and a fixed gap. During the operation of the entire production line, if a bolt or other foreign object falling from upstream equipment is larger than the roller gap, it may cause a series of hazards, mainly including the following:

[0003] On the one hand, there is equipment jamming and shutdown; fallen bolts or other large foreign objects may get stuck in the gaps of the screening rollers, which may prevent the rollers from rotating normally and cause the equipment to "jam"; when the equipment stops, the production line will stop, affecting the production process, and may even require shutdown for maintenance, resulting in a long downtime and a serious decline in production efficiency.

[0004] On the other hand, it can damage the screening rollers and other critical components. If foreign objects get stuck between the rollers and put pressure on the screening rollers, prolonged operation may cause damage to critical components such as the roller body, bearings, and gears of the roller screening device, or even cause component breakage or accelerated wear. Replacing these components may require high maintenance costs and a long repair time.

[0005] Another issue is material blockage and poor flow. When foreign objects get stuck between the rollers, the originally smooth flow of material may be blocked, causing material to accumulate at the feed inlet or screening area. This not only affects the screening effect, making the material sorting uneven or incomplete, but may also cause the material flow to stagnate, thereby aggravating the equipment blockage problem and further increasing the maintenance burden.

[0006] Therefore, the key to solving the above-mentioned technical problems lies in developing a roller screening device with high practicality and operational reliability that can automatically increase the roller gap. Summary of the Invention

[0007] To address the numerous defects and shortcomings in the aforementioned background technology, this invention patent has made improvements and innovations, aiming to provide a roller screening device with an automatically increasing roller gap. The screening roller is supported by an elastic rocker arm, enabling the roller gap to increase within a certain range. When a bolt falling from upstream exceeds the roller gap, the screening roller automatically springs open, increasing the gap and causing the bolt to fall. Then, the screening roller resets, and the gap returns to its normal value.

[0008] To solve the above problems and achieve the above-mentioned invention objectives, this invention patent provides a roller screening device capable of automatically adjusting the roller gap, achieved through the following design structure and the following technical solution:

[0009] An improvement to the roller screening device capable of automatically adjusting the roller gap, as described in this invention patent, includes:

[0010] Side panels (1), the side panels (1) are arranged opposite to each other;

[0011] Several rocker arms (2) are detachably installed at equal intervals on the lower part of the two side arms (1);

[0012] Reset component (3), which is detachably installed at both ends inside each rocker arm (2);

[0013] Drive assembly (4) is connected to the lower part of each rocker arm (2). One end of the drive assembly (4) passes through the end side panel (1) and is connected to the drive sprocket (41). The other end of the drive assembly (4) passes through the end side panel (1) and is connected to the driven sprocket (42).

[0014] Screening roller (5), each screening roller (5) is rotatably connected to the upper part of each rocker arm (2), and one end of the screening roller (5) passes through the side arm (1) of that end and is connected to the screening roller sprocket (51);

[0015] Drive chain link (6), the drive chain link (6) is arranged around the drive sprocket (41);

[0016] Passive chain link (7) is arranged around the upper and lower opposing screening roller sprocket (51) and passive sprocket (42).

[0017] As an improvement to the present invention patent described above, the rocker arm (2) includes:

[0018] Mounting bracket (21);

[0019] Supports (22) are respectively fitted onto the lower ends of the mounting frame (21).

[0020] As a further improvement to the present invention patent described above, the mounting bracket (21) includes:

[0021] The drive shaft mounting cylinder (211) is a square columnar structure with open ends and hollow interior. Limiting plates are also connected to the two ends of the drive shaft mounting cylinder (211).

[0022] Screening roller support seat (212), the screening roller support seats (212) are symmetrically connected to both upper ends of the drive shaft mounting cylinder (211). A support ring for connecting to the screening roller (5) is provided on the upper part of the drive shaft mounting cylinder (211). Among them, the opening of the drive shaft mounting cylinder (211) is a square hole.

[0023] As a further improvement of the above-mentioned invention patent, the support (22) includes:

[0024] Fixing plate (221), the fixing plate (221) is an integral rectangular plate-shaped member. A convex connecting portion is provided in the middle of the fixing plate (221). A drive shaft connecting hole is through-opened in the middle of the convex connecting portion. Fixing holes for installation on the side wall (1) are through-opened at both ends of the fixing plate (221).

[0025] Fixing column (222), one end of the fixing column (222) is connected to the middle of the convex connecting portion of the fixing plate (221). The fixing column (222) is an integral square columnar structure with openings at both ends and a hollow interior. The opening of the fixing column (222) is square-shaped.

[0026] Among them, the fixing plate (221) is obliquely connected to the lower inner side of the side wall (1).

[0027] As a further improvement of the above-mentioned invention patent, the reset member (3) is an integral square columnar structure with openings at both ends and a hollow interior. The opening of the reset member (3) is square-shaped. The size of the opening of the reset member (3) is adapted to the outer circumference of the fixing column (222). Among them, the reset member (3) is symmetrically sleeved inside both ends of the drive shaft mounting cylinder (211) of the mounting frame (21). The opening of the reset member (3) is sleeved on the outside of the fixing column (222) of the support (22).

[0028] As a further improvement of the above-mentioned invention patent, the four corners of the square opening inside the reset member (3) are respectively located in the middle of each side of the reset member (3). Among them, the reset member (3) is made of an elastic material.

[0029] As a further improvement of the above-mentioned invention patent, the cross-section of the side wall (1) is in the shape of a "匚". The opening of the side wall (1) is arranged outward. A plurality of drive shaft connection ports and screening roller connection ports are through-opened at equal intervals along the length direction at both the upper and lower ends of the side wall (1). Among them, a support mounting hole adapted to be connected to the support (22) is also obliquely opened on the side wall (1) at the screening roller connection port.

[0030] As a further improvement to the present invention, the drive assembly (4) includes a drive shaft and two sets of active sprockets (41) connected to one end of the drive shaft (43) and a set of passive sprockets (42) connected to the other end of the drive shaft (43). Both ends of the drive shaft (43) are connected to the side arm (1) on the corresponding side through bearings.

[0031] The two ends of the screening roller (5) are connected to the corresponding screening roller support (212) by bearings.

[0032] As a further improvement to the present invention, the drive chain link (6) is staggered on two adjacent drive sprockets (41), or the drive chain link (6) is coaxially connected on several drive sprockets (41).

[0033] As a further improvement to the present invention, it also includes a protective guide plate (8) on the upper part of the two side panels (1) with an incline, the protective guide plate (8) being arranged in an inverted "V" shape.

[0034] The working principle is as follows: Before using a roller screening device with the above-mentioned design structure that can automatically adjust the roller gap, it needs to be transported to the designated work site by appropriate handling equipment or manually.

[0035] When the equipment is working, when the tobacco leaves pass over the rows of screening rollers (5), under normal circumstances, the gaps between the screening rollers (5) are equal, and the tobacco leaves are screened.

[0036] When the conveyed tobacco leaves contain bolts, and the bolts are larger than the normal gap T of the screening rollers (5), the bolts will get stuck in the gap of the screening rollers (5). As the screening rollers (5) continue to rotate, the bolts will exert a squeezing force on the screening rollers (5). When the squeezing force is greater than the elastic force of the reset piece (3) in the support rocker arm (2), the screening rollers (5) on both sides of the bolt will automatically spring open until the bolt falls. After the bolt falls, the two screening rollers (5) will automatically reset under the elastic action of the reset piece (3) and return to normal screening function.

[0037] During the above operation, the external drive device drives the roller screening device to perform screening work by connecting the drive chain link (6) at one end of the side (1) to the active sprocket (41) via the transmission component. When the external drive device is running, the transmission component drives one of the active sprockets (41) at one end to rotate. Then, under the transmission of the drive chain link (6), each drive component (4) starts to rotate, thereby each drive component (4) drives the passive sprocket (42) connected to it to rotate. Then, the passive sprocket (42) drives the corresponding screening roller (5) to rotate through the passive chain link (7) connected to it, and finally realizes the operation of the screening device.

[0038] The beneficial effects of this invention patent compared to the prior art are:

[0039] 1. The invention patent has a reasonable design that can automatically solve the problem of bolts jamming the screening roller, causing equipment downtime and material blockage, thus improving equipment reliability;

[0040] 2. This invention, through the inclusion of a reset component, automatically adjusts the roller gap when large particles or hard objects are present in the material, preventing clogging caused by excessively large or hard materials. Traditional roller screening devices, lacking elastic components, are prone to jamming or failing to screen smoothly when encountering larger or harder materials. The elastic component automatically widens the roller gap when encountering large materials, preventing clogging and improving screening efficiency.

[0041] 3. This invention patent effectively alleviates overload or damage to the roller screening device caused by excessively large or hard materials through the use of a reset component. Compared with the traditional fixed gap design, the reset component provides appropriate elasticity and flexibility when encountering large particles, preventing damage to the equipment due to strong impacts or excessive loads, and extending the service life of the equipment;

[0042] 4. This invention patent, through its reset component, can prevent bolt blockage and reduce equipment damage. The elastic component design helps reduce equipment maintenance frequency and costs. It reduces downtime and manual intervention due to blockages, resulting in smoother equipment operation and significantly lower maintenance costs over long-term use.

[0043] 5. This invention patent, by combining the reset component with a specially designed rocker arm frame, ensures smoother operation of the equipment and reduces the likelihood of downtime or instability caused by material blockage or jamming. This allows the equipment to maintain stable operation even when faced with fluctuations in material flow or uneven particle size.

[0044] 6. This invention patent avoids frequent shutdowns for cleaning due to blockages, allowing the production line to operate continuously and reducing downtime. The automatic adjustment function of the flexible components makes the screening process more efficient, adaptable to materials of different sizes, ensuring high efficiency and continuity in the screening process, and improving production efficiency.

[0045] 7. This invention patent, through the design of the reset component, enables the roller screening device to better adapt to materials of various particle sizes and hardnesses. Especially when processing irregular materials, materials containing large lumps, or sticky materials, it can maintain good screening results by automatically adjusting the roller gap. This highly adaptable design enhances the equipment's usability under various complex working conditions. 2. This invention patent is ingeniously designed, safe, reliable, and has a simple structure, making it applicable to various usage scenarios.

[0046] 8. The material feeding port of this invention is equipped with a protective guide plate, which can effectively guide the material into the screening area, reduce the phenomenon of material splashing or spilling, maintain the cleanliness of the working environment, and reduce material waste.

[0047] 9. The protective guide plate designed in this invention can optimize the feeding angle and distribution of materials, improve the flowability during the screening process, make the materials pass through the screen more smoothly, which is conducive to improving screening efficiency and thus extending the service life of the device.

[0048] 10. The simple structure of this invention reduces production and maintenance costs, while also lowering the failure rate and improving the reliability and durability of the device. Attached Figure Description

[0049] The specific embodiments of this invention patent will be further described in detail below with reference to the accompanying drawings, wherein:

[0050] Figure 1 This is a schematic diagram of the overall structure of this invention patent;

[0051] Figure 2 This is one of the partial structural schematic diagrams of this invention patent;

[0052] Figure 3 This is the second partial structural schematic diagram of the present invention patent;

[0053] Figure 4 This is one of the partial structural cross-sectional views of this invention patent;

[0054] Figure 5 This is one of the partial structural side views of this invention patent;

[0055] Figure 6 This is a second partial structural side view of the present invention patent;

[0056] Figure 7 This is the second partial structural cross-sectional view of this invention patent;

[0057] Figure 8 This is a partial exploded view of the structure of this invention patent;

[0058] Figure 9 This is one of the usage status diagrams of this invention patent;

[0059] Figure 10 This is the second usage state diagram of this invention patent;

[0060] Figure 11 This is the third diagram showing the usage status of this invention patent;

[0061] In the diagram, number 1 represents the side panel.

[0062] 2—rocker arm bracket, 21—mounting bracket, 211—drive shaft mounting cylinder, 212—screening roller support seat, 22—support, 221—fixed plate, 222—fixed column;

[0063] 3—Reset component;

[0064] 4—Drive assembly, 41—Drive sprocket, 42—Drive sprocket, 43—Drive shaft;

[0065] 5—Screening roller, 51—Screening roller sprocket;

[0066] 6—Drive chain link;

[0067] 7—Passive chain link;

[0068] 8—Protective guide plate. Detailed Implementation

[0069] To make the technical means, inventive features, objectives, and effects of this invention patent easier to understand, the technical solution of this invention patent will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The invention patent will now be described in detail with reference to the accompanying drawings and embodiments.

[0070] As per the instruction manual Figure 1 To the instruction manual Figure 11 The roller screening device shown includes:

[0071] Side panel 1, side panels 1 are arranged opposite to each other;

[0072] Several rocker arms 2, the lower ends of which are detachably installed at equal intervals inside the lower part of the two side panels 1;

[0073] Reset component 3 is detachably installed at both ends inside each rocker arm 2;

[0074] Drive assembly 4 is connected to the lower part of each rocker arm 2. One end of drive assembly 4 passes through the side arm 1 and is connected to the drive sprocket 41. The other end of drive assembly 4 passes through the side arm 1 and is connected to the driven sprocket 42.

[0075] Screening rollers 5 are rotatably connected to the upper part of each rocker arm 2. One end of the screening roller 5 passes through the side arm 1 and is connected to a screening roller sprocket 51.

[0076] Drive chain link 6, which is arranged around the drive sprocket 41;

[0077] Passive chain link 7 is respectively arranged around the upper and lower opposing screening roller sprocket 51 and passive sprocket 42.

[0078] Furthermore, such as Figures 6 to 8 As shown, the rocker arm 2 includes:

[0079] Mounting bracket 21;

[0080] Supports 22 are respectively fitted onto the lower parts of both ends of the mounting frame 21.

[0081] Specifically, such as Figure 8 As shown, the mounting bracket 21 includes:

[0082] The drive shaft mounting cylinder 211 is a square columnar structure with open ends and hollow interior. Limiting plates are also connected to the two ends of the drive shaft mounting cylinder 211.

[0083] Screening roller support 212 is symmetrically connected to the upper two ends of drive shaft mounting cylinder 211. The upper part of drive shaft mounting cylinder 211 is provided with a support ring connected to screening roller 5. The opening of drive shaft mounting cylinder 211 is a square hole.

[0084] In this invention patent, a through hole is provided in the middle of the limiting plate. The limiting plate is used to limit the movement of the reset component 3, and also facilitates the installation of the reset component 3.

[0085] More specifically, such as Figure 8 As shown, the support 22 includes:

[0086] The fixing plate 221 is a rectangular plate-shaped component. The middle part of the fixing plate 221 is provided with a protruding connecting part, and a drive shaft connecting hole is opened through the middle part of the protruding connecting part. Fixing holes for mounting on the side wall 1 are opened through both ends of the fixing plate 221.

[0087] The fixing post 222 has one end connected to the middle of the protruding connecting part of the fixing plate 221. The fixing post 222 is a square column structure with open ends and hollow interior. The opening of the fixing post 222 is square.

[0088] The fixing plate 221 is inclinedly connected to the lower inner side of the side panel 1.

[0089] In this invention patent, the thickness of each side plate of the fixed column 222 is consistent.

[0090] Furthermore, such as Figure 8As shown, the reset member 3 is integrally in the shape of a square columnar body with openings at both ends and a hollow interior. The opening of the reset member 3 is square-shaped, and the size of the opening of the reset member 3 is adapted to the outer circumference of the fixing column 222. Among them, the reset member 3 is symmetrically sleeved inside both ends of the drive shaft mounting cylinder 211 of the mounting frame 21, and the opening of the reset member 3 is sleeved outside the fixing column 222 of the support 22.

[0091] Specifically, as Figure 8 shown, the four corners of the square opening inside the reset member 3 are respectively located in the middle of each side of the reset member 3. Among them, the reset member 3 is made of an elastic material.

[0092] In this invention patent, the reset member 3 is made of rubber material, and can be integrally formed, or can be four cylindrical rubber bodies. The four cylindrical rubber bodies are annularly filled in the gap formed by the fixing column 222 and the drive shaft mounting cylinder 211.

[0093] Furthermore, as Figure 8 shown, the cross-section of the side wall 1 is in the shape of a "匚", and the opening of the side wall 1 faces outward. A plurality of drive shaft connection ports and screening roller connection ports are equidistantly penetrated along the length direction at both the upper and lower ends of the side wall 1. Among them, a support mounting hole adapted to be connected to the support 22 is obliquely opened on the side wall 1 at the screening roller connection port.

[0094] Furthermore, as Figure 7 and Figure 8 shown, the drive assembly 4 includes a drive shaft, two groups of driving sprockets 41 connected to one end of the drive shaft 43, and a group of driven sprockets 42 connected to the other end of the drive shaft 43. Both ends of the drive shaft 43 are connected to the side wall 1 on the corresponding side through bearings;

[0095] Both ends of the screening roller 5 are connected to the corresponding screening roller support seats 212 through bearings.

[0096] In this invention patent, an external driving device drives the roller screening device to perform screening work through a transmission member connected to the driving sprocket 41 connected to the non-driving chain link 6 at one end of the side wall 1.

[0097] Furthermore, as Figures 1 to 4 shown, the drive chain link 6 is cross-connected to two adjacent driving sprockets 41, or the drive chain link 6 is coaxially connected to a plurality of driving sprockets 41.

[0098] Furthermore, as Figures 1 to 3 shown, it further includes a protective guide plate 8 obliquely arranged in the upper part inside the two side walls 1. The protective guide plate 8 is integrally arranged in an inverted "V" shape.

[0099] Meanwhile, in this invention patent, the connections referred to are all fixed connections, movable connections, or detachable connections. Among them, fixed connections are welded connections or directly processed into an integral structure; movable connections, detachable connections, or split structures are hinged connections, internal and external threaded connections, bayonet connections, plug-in sleeves, bolt assembly connections, or screw connections.

[0100] In summary, a more specific embodiment of this invention is as follows:

[0101] Support 22 is fixed to the lower inner side of side 1, and the lower ends of mounting bracket 21 are fitted onto the corresponding support 22; fixing column 222 is fitted into the square hole of reset member 3, and the outer side of reset member 3 is installed at both ends of the square hole in drive shaft mounting cylinder 211. Under the balanced support of the elastic force of reset member 3, mounting bracket 21 and support 22 maintain a stable relative position.

[0102] The drive shaft 43 passes through the inner hole in the middle of the fixing plate 221 of the support 22. One end of the drive shaft 43 is equipped with a drive sprocket 41, and the other end is equipped with a driven sprocket 42. One end of the screening roller 5 passes through the side panel 1 and is equipped with a screening roller sprocket 51. The drive sprockets 41 on two adjacent drive components 4 drive the drive shaft 43 and the driven sprocket 42 to rotate through staggered drive chain links 6. The driven sprocket 42 drives the screening roller sprocket 51 to rotate through the driven chain link 7, thereby driving each screening roller 5 to rotate individually. Since the center distance between the mounting holes of the screening roller 5 on the rocker arm 2 and the mounting holes of the support 22 is fixed, and the drive shaft 43 is coaxial with the support 22, the center distance of the driven chain link 7 is fixed. The swing of the rocker arm 2 and the screening roller 5 does not affect the transmission of the driven chain link 7.

[0103] When a horizontal force is applied to the screening roller 5, a rotational torque is generated around the support 22 through the rocker arm 2. When this torque is greater than the initial elastic force of the reset member 3, the screening roller 5 and the rocker arm 2 can rotate and swing within a certain range along the axis of the support 22. When the horizontal force applied to the screening roller 5 is removed, the rotational torque disappears, and the screening roller 5 and the rocker arm 2 reset.

[0104] Before use, the roller screening device with the above-mentioned design structure that can automatically adjust the roller gap needs to be transported to the designated work site by appropriate handling equipment or manually.

[0105] When the equipment is working, as the tobacco leaves pass through the rows of screening rollers 5, under normal circumstances, the gaps between the screening rollers 5 are equal, and the tobacco leaves are screened.

[0106] When the conveyed tobacco leaves contain bolts, and the bolts are larger than the normal gap of the screening rollers 5, the bolts will get stuck in the gap of the screening rollers 5. As the screening rollers 5 continue to rotate, the bolts exert a squeezing force on the screening rollers 5. When the squeezing force is greater than the elastic force of the reset piece 3 in the support rocker arm 2, the screening rollers 5 on both sides of the bolt will automatically spring open until the bolt falls off. After the bolt falls off, the two screening rollers 5 will reset under the elastic action of the reset piece 3 and return to normal screening function.

[0107] During the above operation, the external drive device is connected to the drive sprocket 41 connected to the drive chain link 6 at one end of the side 1 via a transmission component to drive the roller screening device to perform screening work. When the external drive device is running, the transmission component drives one of the drive sprockets 41 at one end to rotate. Then, under the transmission of the drive chain link 6, each drive component 4 starts to rotate, thereby driving the passive sprocket 42 connected to it to rotate. Then, the passive sprocket 42 drives the corresponding screening roller 5 to rotate through the passive chain link 7 connected to it, and finally realizes the operation of the screening device.

[0108] Finally, it should be noted that the specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art.

Claims

1. A roller screening device capable of automatically adjusting the roller gap, characterized in that, include: Side panels (1), the side panels (1) are arranged opposite to each other; Several rocker arms (2) are detachably installed at equal intervals on the lower part of the two side arms (1); Reset component (3), which is detachably installed at both ends inside each rocker arm (2); Drive assembly (4) is connected to the lower part of each rocker arm (2). One end of the drive assembly (4) passes through the end side panel (1) and is connected to the drive sprocket (41). The other end of the drive assembly (4) passes through the end side panel (1) and is connected to the driven sprocket (42). Screening roller (5) is rotatably connected to the upper part of each rocker arm (2). One end of the screening roller (5) passes through the side arm (1) and is connected to the screening roller sprocket (51). Drive chain link (6), drive chain link (6) surrounds the drive sprocket (41); Passive chain link (7), the passive chain link (7) is respectively arranged around the upper and lower opposite screening roller sprocket (51) and passive sprocket (42); The rocker arm (2) includes: Mounting bracket (21); Supports (22) are respectively fitted onto the lower parts of both ends of the mounting frame (21); The mounting bracket (21) includes: The drive shaft mounting cylinder (211) is a square columnar structure with open ends and hollow interior. The two ends of the drive shaft mounting cylinder (211) are also connected to limit plates. Screening roller support seat (212) is symmetrically connected to the upper two ends of the drive shaft mounting cylinder (211). The upper part of the drive shaft mounting cylinder (211) is provided with a support ring connected to the screening roller (5). The opening of the drive shaft mounting cylinder (211) is a square hole. The support (22) includes: The fixing plate (221) is a rectangular plate-shaped component. The middle part of the fixing plate (221) is provided with a protruding connecting part. The middle part of the protruding connecting part is provided with a drive shaft connecting hole. The two ends of the fixing plate (221) are provided with fixing holes for mounting on the side wall (1). The fixing column (222) is connected at one end to the middle of the protruding connecting part of the fixing plate (221). The fixing column (222) is a square column structure with open ends and hollow interior. The opening of the fixing column (222) is square. Among them, the fixing plate (221) is inclinedly connected to the lower part of the inner side of the side panel (1); The reset component (3) is a square column structure with open ends and hollow interior. The opening of the reset component (3) is square and the size of the opening is adapted to the outer periphery of the fixed column (222). The reset component (3) is symmetrically sleeved inside the drive shaft mounting cylinder (211) of the mounting bracket (21), and the opening of the reset component (3) is sleeved on the outside of the fixed column (222) of the support (22).

2. The roller screening device with automatically adjustable roller gap according to claim 1, characterized in that, The four corners of the square opening inside the reset component (3) are located in the middle of each side of the reset component (3), and the reset component (3) is made of elastic material.

3. A roller screening device capable of automatically adjusting the roller gap according to claim 1, characterized in that, The cross-section of the side wall (1) is in a "匚" shape, the opening of the side wall (1) faces outward, and a plurality of drive shaft connection ports and screening roller connection ports are equidistantly and throughly opened at both the upper and lower ends of the side wall (1) along its length direction. Among them, a support mounting hole adapted to be connected with the support (22) is obliquely opened on the side wall (1) at the screening roller connection port.

4. A roller screening device capable of automatically adjusting the roller gap according to claim 1, characterized in that, The drive assembly (4) includes a drive shaft, two groups of driving sprockets (41) connected to one end of the drive shaft (43), and a group of driven sprockets (42) connected to the other end of the drive shaft (43). Both ends of the drive shaft (43) are connected to the side wall (1) on the corresponding side through bearings. Both ends of the screening roller (5) are connected to the corresponding screening roller support seats (212) through bearings.

5. A roller screening device capable of automatically adjusting the roller gap according to claim 1, characterized in that, The drive chain links (6) are交错连接 in adjacent two driving sprockets (41), or the drive chain links (6) are coaxially connected to a plurality of driving sprockets (41).

6. A roller screening device capable of automatically adjusting the roller gap according to claim 1, characterized in that, It further includes a protective guide plate (8) obliquely arranged in the upper inner parts of the two side walls (1), and the protective guide plate (8) is integrally arranged in an inverted "八" shape. It should be noted that the Chinese character "交错连接" in is not accurately translated as there is no exact equivalent in English. A more appropriate expression might be "interconnected alternately" or something similar, but following the instruction to only translate as per the rules, the literal translation is provided as above. Also, the character "八" in is just a placeholder and should remain as it is.

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