A multi-stage screening device for the production of a sizing compound

Abstract

The utility model relates to the technical field of reclaimed rubber production, specifically relates to a multistage screening device of rubber production, and the technical problem to be solved is to overcome the defects of screening effect in the prior art, mainly realized through the following technical scheme: a multistage screening device of rubber production, screening frame body, screen cloth structure and flatten structure are connected with the feeding structure and are equipped with the discharge structure on the screening frame body, the screen cloth structure is arranged in the screening frame body, the screen cloth structure includes first screen cloth piece, second screen cloth piece and third screen cloth piece, the flatten structure is located on the first screen cloth piece, the flatten structure includes two conveying chains, flatten drive part, flatten roller and flatten rod, the flatten roller reciprocatingly shifts and is arranged on the first screen cloth plate, the flatten roller side is further equipped with the material flat plate, the rubber is quantitatively fed and is screened through the feeding structure, and three -level screening structure is set up to carry out fine screening, the screening process sets up the material baffle and reduces the environmental influence, and the whole use is convenient and is convenient for discharge conveying.

Description

Technical Field

[0001] This utility model relates to the field of recycled rubber production technology, specifically to a multi-stage screening device for rubber production. Background Technology

[0002] Rubber compound is the raw material for the refining of recycled rubber. It is made by crushing and magnetic separation of waste rubber. After crushing and magnetic separation of waste rubber, the rubber compound needs to be screened and filtered. On the one hand, impurities in the rubber compound are removed, and on the other hand, the rubber compound is separated according to the mesh size of the crushed rubber to facilitate the subsequent production of different specifications.

[0003] In existing technologies, rubber compounds are sieved using vibrating screens to determine the required mesh size for production. The rubber compound is directly conveyed and poured onto the screen by a material conveying device. This results in excessive weight and accumulation on one side, hindering sieving and causing the screen to become clogged, thus affecting subsequent sieving efficiency. Furthermore, because the crushed rubber particles are small and lightweight, the upper layer of existing linear screens is often exposed, easily generating large amounts of dust during sieving, and particles may scatter, impacting the production environment. In addition, the screen installation structure of the sieving equipment is complex, making quick disassembly and replacement difficult, and the screening outlets are too close together, hindering the connection to the discharge structure. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the defects in the screening effect of the prior art, thereby providing a multi-stage screening device for rubber production.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A multi-stage screening device for rubber compound production includes a screening frame, a screen structure, and a leveling structure. A feeding structure is connected to one end of the screening frame, and a discharge structure is located at the end furthest from the feeding structure. The screen structure is housed within the screening frame and includes a first screen element, a second screen element, and a third screen element arranged sequentially from top to bottom. The leveling structure is housed within the screening frame and located on the first screen element. The leveling structure includes two conveyor chains, a leveling drive, multiple leveling rollers, and multiple leveling rods. The two conveyor chains are waist-shaped and installed on the front and rear sides of the screening frame. The leveling drive controls the synchronous rotation of the conveyor chains. Both ends of the leveling rods are fixed to the two conveyor chains, and the axis of the leveling rods is perpendicular to the side of the conveyor chains. The leveling rollers are positioned corresponding to and sleeved on the leveling rods. A material separator is also provided on the first screen element.

[0007] By adopting the above technical solution, the rubber material is quantitatively fed and screened through the feeding structure, avoiding excessive dumping at one time which would affect the screening effect; a partition plate is set on the screening frame to reduce particle spillage during screening vibration and reduce the impact on the production environment; through the three-stage screening structure, the screening fineness increases from top to bottom, which is convenient to use and has high working efficiency; the staggered screening outlets also facilitate connection to the subsequent discharge structure, which facilitates rapid discharge and conveying.

[0008] Furthermore, the screening frame includes a screening box and a screening support. The screening box is installed on the screening support. Vibration springs are provided at the top of the four corners of the screening support. One end of the vibration spring is fixed to the bottom of the screening box, and the other end is fixed to the screening support. A vibration motor is installed at the bottom of the screening box near the feeding structure. A feeding box is also provided on the screening box corresponding to the feeding structure.

[0009] By adopting the above technical solution, the vibration motor drives the screening box to vibrate on the screening support, thereby transporting the rubber material in the screening box to the left. The feeding box is connected to the screening box to realize the feeding operation of the rubber material.

[0010] Furthermore, the feeding structure includes a feeding frame, a pneumatic conveyor, and a storage tank. The feeding frame is located at one end of the screening frame, the storage tank is mounted on the feeding frame, the pneumatic conveyor is connected to the top of the storage tank, a control valve is provided near the bottom of the storage tank, the bottom of the storage tank extends into the feeding box, and an inclined feeding plate is provided inside the feeding box. The height of the feeding plate on the side closer to the screen structure is lower than the height on the side farther from the screen structure.

[0011] By adopting the above technical solution, the pneumatic conveyor delivers unsorted rubber material from the front-end process to the storage tank fixed on the feeding rack. The rubber material is temporarily stored in the storage tank and weighed. A certain amount of rubber material is conveyed to the feeding plate in the feeding box over a certain period of time to complete the quantitative feeding operation of the rubber material.

[0012] Furthermore, the first screen component includes a first screen frame and a first screen plate arranged along the length of the screening box. The first screen plate is horizontally arranged and snapped into the bottom of the first screen frame. The second screen component includes a second screen frame and a second screen plate, with the second screen plate snapped into the bottom of the second screen frame. The third screen component includes a third screen frame and a third screen plate, with the third screen plate snapped into the bottom of the third screen frame. The second and third screen plates are both inclined in opposite directions. The second and third screen plates are both arranged along the length of the screening box and are inclined towards the front or rear side of the screening box, respectively. The lower end of the second screen plate is positioned close to the upper end of the third screen plate. The first, second, and third screen plates are all arranged in an array with screening holes, and the diameter of the screening holes gradually decreases from top to bottom.

[0013] By adopting the above technical solution, the first, second and third screens with multi-layer grading can achieve screening of rubber materials at multiple mesh sizes, which facilitates improved work efficiency, and the rubber materials closer to the bottom are finer.

[0014] Furthermore, a first guide plate is also provided inside the screening box corresponding to the bottom of the first screen plate. The first guide plate is relatively inclined at both ends inside the screening box, and the height of the end of the first guide plate that is close to each other is lower than the height of the end of the first guide plate that is far apart from each other. A second guide plate is also provided inside the screening box corresponding to the bottom of the second screen plate. The second guide plate is relatively inclined at both ends inside the screening box, and the height of the end of the second guide plate that is close to each other is lower than the height of the end of the second guide plate that is far apart from each other.

[0015] By adopting the above technical solution, the first guide plate and the second guide plate gather the rubber material to the middle of the corresponding second screen plate and third screen plate, increasing the screening stroke of the rubber material and ensuring thorough screening.

[0016] Furthermore, the screening box has several discharge ports corresponding to the first, second, and third screen components. The discharge ports are located on the side wall and bottom of the screening box at the end away from the feeding structure. A discharge structure is also provided at the discharge port. The discharge structure includes a first discharge component, a second discharge component, a third discharge component, and a bottom discharge component. The first discharge component extends from the end of the screening box away from the feeding structure and is an open discharge hopper. The second and third discharge components extend from the side wall of the screening box at the end away from the feeding structure and are respectively located on the front or rear side of the screening box. The second and third discharge components have the same structure and are both discharge channels. The bottom discharge component is located at the bottom of the screening box at the end away from the feeding structure and is a frustum-shaped cone with a diameter decreasing from top to bottom.

[0017] By adopting the above technical solution, the first discharge component, the second discharge component, the third discharge component, and the bottom discharge component are set on different side walls and bottom of the screening box, which distinguishes the discharge ports to avoid mixing at the discharge ports and also prevents some unscreened rubber material from falling directly out of the next stage discharge port on the same side, thereby increasing the accuracy of rubber material screening.

[0018] Furthermore, a leveling structure is provided above the first screen component, and the leveling roller is reciprocally slidably disposed on the first screen plate. The projected length of the conveyor chain on the horizontal plane is less than the length of the first screen plate. Multiple material spreading protrusions are arrayed on the outer peripheral wall of the leveling roller. A flat material plate parallel to the leveling roller is also provided on one side of the leveling roller. The flat material plate is extended and fixed to the leveling rod and is vertically disposed. The height of the flat material plate is not less than the diameter of the leveling roller. When the leveling roller is located on the upper side of the conveyor chain, the flat material plate is disposed on the left side of the leveling roller.

[0019] By adopting the above technical solution, the leveling roller moves on the conveyor chain with the leveling rod, thereby leveling and rolling the surface of the rubber material, reducing the possibility of rubber material accumulation, facilitating thorough screening of the rubber material, and the flat plate can also assist the leveling roller in scraping the material, scraping and stirring the surface of the rubber material, and playing an auxiliary screening role when the screening box vibrates.

[0020] Furthermore, a material guide plate is hinged to the bottom of the feeding plate, and a torsion spring is sleeved on the hinge shaft between the material guide plate and the feeding plate. A baffle plate extends vertically from the bottom of the feeding plate and abuts against the upper surface of the material guide plate. Under normal conditions, the tilt angle of the material guide plate is greater than that of the feeding plate. A deflecting plate extends from the bottom of the material guide plate. When the leveling roller moves to the bottom of the material guide plate, the top of the leveling plate abuts against the bottom of the deflecting plate.

[0021] By adopting the above technical solution, when the leveling roller moves to the bottom of the feeding plate, the top of the leveling plate abuts against the bottom of the feeding plate and moves to the right with the leveling roller. The feeding block drives the feeding plate to rotate counterclockwise, shaking the rubber material accumulated on the feeding plate and causing it to fall. The leveling plate continues to move and opens away from the feeding plate. The feeding plate is reset under the action of the torsion spring on the hinge shaft and makes a slight impact on the baffle plate, causing the feeding plate to vibrate slightly. This makes it easier for the rubber material on the feeding plate to flow downward along the arc of the feeding plate, which is convenient for feeding operations. The baffle plate can also block the hinge shaft of the feeding plate to prevent the rubber material from being wrapped into the hinge shaft and affecting the transmission.

[0022] In summary, the technical solution of this utility model has the following advantages:

[0023] 1. The multi-stage screening device for rubber production provided by this utility model has a screen structure that can perform multi-stage screening of rubber, ensuring the efficiency of rubber grading and screening. The inclination of the second and third screens in opposite directions can reduce the possibility of clogging of the screen holes when the material falls, ensuring smooth screening.

[0024] 2. The multi-stage screening device for rubber production provided by this utility model is equipped with a leveling roller and a flat plate that reciprocate to continuously scrape and stir the rubber on the upper surface of the first screen, thereby avoiding rubber agglomeration and reducing the possibility of rubber accumulation, and effectively improving the screening efficiency of the rubber.

[0025] 3. The multi-stage screening device for rubber production provided by this utility model has a feeding plate and a flat plate that can provide initial power to the rubber during feeding, avoiding excessive rubber feeding and accumulation on the feeding plate. Since the flat plate array is set on the conveyor chain, it can intermittently shake the area below the feeding plate, avoiding continuous movement that could cause the rubber to be rolled into the moving parts and affect the subsequent screening effect. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a multi-stage screening device for rubber production provided in one embodiment of the present invention;

[0028] Figure 2 This is a longitudinal sectional view of a screening box provided in one embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the internal structure of a screening box provided in one embodiment of the present utility model;

[0030] Figure 4 This is a partial structural diagram of a flattening roller provided in one embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Screening frame; 2. Screening box; 21. Vibrating motor; 22. Feeding box; 221. Feeding plate; 2211. Baffle plate; 222. Pushing plate; 2221. Pushing plate; 23. First guide plate; 24. Second guide plate; 25. Discharge port; 3. Screening support; 31. Vibrating spring; 4. Screen structure; 41. First screen component; 411. First screen frame; 412. First screen plate; 413. Separator plate; 42. Second screen component; 421. Second screen frame; 422. Second screen... 43. Screen plate; 431. Third screen component; 432. Third screen frame; 44. Screening hole; 5. Leveling structure; 51. Conveyor chain; 52. Leveling drive component; 53. Leveling roller; 531. Material spreading protrusion; 532. Flat material plate; 54. Leveling rod; 6. Feeding structure; 61. Feeding rack; 62. Pneumatic conveyor component; 63. Storage tank; 631. Control valve; 7. Discharge structure; 71. First discharge component; 72. Second discharge component; 73. Third discharge component; 74. Bottom discharge component. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0034] A multi-stage screening device for rubber compound production, such as Figure 1 , Figure 2 and Figure 3As shown, the screen includes a screening frame 1, a screen structure 4, and a leveling structure 5. A feeding structure 6 is connected to the upper right end of the screening frame 1, and a discharge structure 7 is located at the end furthest from the feeding structure 6. The screen structure 4 is housed within the screening frame 1 and includes a first screen element 41, a second screen element 42, and a third screen element 43 arranged sequentially from top to bottom. The leveling structure 5 is housed within the screening frame 1 and located on top of the first screen element 41. The leveling structure 5 includes two conveyor chains 51 and a leveling drive component. 52. Multiple leveling rollers 53 and multiple leveling rods 54 are provided. Two conveyor chains 51 are waist-shaped and installed on the front and rear sides inside the screening frame 1. The leveling drive unit 52 controls the synchronous rotation of the transmission chains. The two ends of the leveling rods 54 are fixed on the two conveyor chains 51 respectively, and the axis of the leveling rods 54 is perpendicular to the side of the conveyor chains 51. The leveling rods 54 are also arranged in an array along the circumference of the conveyor chains 51. The leveling rollers 53 are set corresponding to the leveling rods 54 and are sleeved on the leveling rods 54. The first screen 41 is also provided with a partition plate 413. The rubber material is quantitatively fed and screened by the feeding structure 6 to avoid excessive dumping at one time, which would affect the screening effect. The partition plate 413 on the screening frame 1 reduces the overflow of particles during screening vibration and reduces the impact on the production environment. Through the three-stage screening structure, the screening fineness increases from top to bottom. It is convenient to use and has high working efficiency. The staggered screening outlets also facilitate connection to the subsequent discharge structure 7 for rapid discharge and conveying.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, the screening frame 1 includes a screening box 2 and a screening support 3. The screening box 2 is mounted on the screening support 3. Vibration springs 31 are installed at the top of the four corners of the screening support 3. One end of the vibration spring 31 is fixed to the bottom of the screening box 2, and the other end is fixed to the screening support 3. The vibration spring 31 on the right end is slightly higher than the vibration spring 31 on the left end, forming a height difference, which facilitates the transmission of the rubber material to the left during vibration screening. A vibration motor 21 is installed at the bottom of the screening box 2 near the feeding structure 6. The vibration motor 21 vibrates and drives the screening box 2 to vibrate on the screening support 3, thereby transporting the rubber material in the screening box 2 to the left. The feeding box 22 is connected to the screening box 2 to realize the feeding operation of the rubber material.

[0036] like Figure 1 , Figure 2 and Figure 3As shown, a feeding box 22 extends from the screening box 2 corresponding to the feeding structure 6. The feeding structure 6 includes a feeding frame 61, a pneumatic conveyor 62, and a storage tank 63. The feeding frame 61 is located at one end of the screening frame 1, and the storage tank 63 is installed on the feeding frame 61. The pneumatic conveyor 62 is connected to the top of the storage tank 63. A control valve 631 is also provided near the bottom of the storage tank 63. The bottom of the storage tank 63 extends into the feeding box 22. An inclined feeding plate 221 is also provided inside the feeding box 22. The height of the feeding plate 221 on the side closer to the screen structure 4 is lower than the height on the side farther from the screen structure 4. The pneumatic conveyor 62 delivers unsorted rubber material from the front-end process to the storage tank 63 fixed on the feeding frame 61. The rubber material is temporarily stored in the storage tank 63 and weighed. The rubber material is conveyed to the feeding plate 221 in the feeding box 22 within a certain time period or in a certain amount to complete the quantitative feeding operation of the rubber material.

[0037] like Figure 2 and Figure 3 As shown, the first screen component 41 includes a first screen frame 411 and a first screen plate 412 arranged along the length of the screening box 2. The first screen plate 412 is horizontally arranged and snapped into the bottom of the first screen frame 411. The second screen component 42 includes a second screen frame 421 and a second screen plate 422, which is snapped into the bottom of the second screen frame 421. The third screen component 43 includes a third screen frame 431 and a third screen plate 432, which is snapped into the bottom of the third screen frame 431. The second screen plate 422 and the third screen plate 432 are both inclined in opposite directions. The second screen plate 422 and the third screen plate 432 are both arranged along the length of the screening box 2 and are inclined towards the front or rear side of the screening box 2, respectively. The lower end of the second screen plate 422 is close to the upper end of the third screen plate 432. In this embodiment, the second screen plate 422 is tilted to the rear and the third screen plate 432 is tilted to the front. The multi-layered grading of the first screen 41, the second screen 42 and the third screen 43 enables the screening of rubber materials at multiple mesh sizes, which facilitates improved work efficiency, with the rubber material being finer closer to the bottom.

[0038] The first screen plate 412, the second screen plate 422 and the third screen plate 432 are all provided with sieve holes 44 arranged in an array, and the diameter of the sieve holes 44 decreases from top to bottom. The hole diameter on the first screen plate 412 is larger than the hole diameter on the second screen plate 422, and the hole diameter on the second screen plate 422 is larger than the hole diameter on the third screen plate 432.

[0039] Inside the screening box 2, corresponding to the bottom of the first screen plate 412, a first guide plate 23 is also provided. The first guide plates 23 are relatively inclined and set at both ends of the screening box 2, with the height of the ends of the first guide plates 23 that are close to each other being lower than the height of the ends that are far apart. Inside the screening box 2, corresponding to the bottom of the second screen plate 422, a second guide plate 24 is also provided. The second guide plates 24 are relatively inclined and set at both ends of the screening box 2, with the height of the ends of the second guide plates 24 that are close to each other being lower than the height of the ends that are far apart. The first guide plates 23 and the second guide plates 24 gather the rubber material to the middle of the corresponding second screen plate 422 and third screen plate 432, increasing the screening stroke of the rubber material and ensuring thorough screening.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, the screening box 2 has several discharge ports 25 corresponding to the first screen component 41, the second screen component 42, and the third screen component 43. The discharge ports 25 are located on the side wall and bottom of the screening box 2 at the end away from the feeding structure 6. A discharge structure 7 is also provided at the discharge port 25. The discharge structure 7 includes a first discharge component 71, a second discharge component 72, a third discharge component 73, and a bottom discharge component 74. The first discharge component 71 extends and is located at the end of the screening box 2 away from the feeding structure 6, i.e., the left end of the screening box 2. The first discharge component 71 is an open discharge hopper. The second discharge component 72 is an open discharge hopper. The second discharge component 73 is an open discharge hopper. The third discharge component 74 is an open discharge hopper. The fourth discharge component 73 is an open discharge hopper. The fifth discharge component 74 is an open discharge hopper. The sixth discharge component 74 is an open discharge hopper. The seventh ... The first discharge component 71, the second discharge component 72, and the third discharge component 73 extend and are disposed on the side wall of the screening box 2 away from the feeding structure 6. The second discharge component 72 and the third discharge component 73 are respectively disposed on the front or rear side of the screening box 2. In this embodiment, the second discharge component 72 is disposed on the rear side of the screening box 2 and the third discharge component 73 is disposed on the front side of the screening box 2. The second discharge component 72 and the third discharge component 73 have the same structure and are both discharge channels. The bottom discharge component 74 is disposed at the bottom of the screening box 2 away from the feeding structure 6. The bottom discharge component 74 is in the shape of a frustum with a diameter decreasing from top to bottom. The first discharge component 71, the second discharge component 72, the third discharge component 73, and the bottom discharge component 74 are disposed on different side walls and at the bottom of the screening box 2, which distinguishes the discharge ports 25 to avoid mixing at the discharge ports 25 and also to prevent some unscreened rubber material from falling directly from the next-level discharge port 25 on the same side, thereby increasing the accuracy of rubber material screening.

[0041] like Figure 3 and Figure 4As shown, a leveling structure 5 is provided above the first screen 41. The leveling roller 53 is reciprocally sliding on the first screen plate 412. The projection length of the conveyor chain 51 on the horizontal plane is less than the length of the first screen plate 412. Multiple material spreading protrusions 531 are arrayed on the outer peripheral wall of the leveling roller 53. A flat material plate 532 parallel to the material spreading roller is also provided on one side of the leveling roller 53. The flat material plate 532 is extended and fixed with the leveling rod 54 and is vertically arranged. The height of the flat material plate 532 is not less than the diameter of the material spreading roller. When the leveling roller 53 is located on the upper side of the conveyor chain 51, the flat material plate 532 is located on the left side of the leveling roller 53. The leveling roller 53 moves along the leveling rod 54 on the conveyor chain 51, thereby leveling and rolling the rubber material surface, reducing the possibility of rubber material accumulation, and facilitating thorough screening of the rubber material. The flat plate 532 can also assist the leveling roller 53 in performing scraping operations, scraping and stirring the rubber material surface, and playing an auxiliary screening role when the screening box 2 vibrates.

[0042] A material guide plate 222 is hinged to the bottom of the feeding plate 221. A torsion spring (not shown in the figure) is also fitted on the hinge shaft between the material guide plate 222 and the feeding plate 221. The two rods of the torsion spring abut against the bottom surface of the feeding plate 221 and the bottom surface of the material guide plate 222, respectively. A baffle plate 2211 extends vertically from the bottom of the feeding plate 221 and abuts against the upper surface of the material guide plate 222. Under normal conditions, the tilt angle of the material guide plate 222 is greater than the tilt angle of the feeding plate 221. A deflecting plate 2221 extends from the bottom of the material guide plate 222. When the leveling roller 53 moves to the bottom of the material guide plate 222, the top of the leveling plate 532 abuts against the bottom of the deflecting plate 2221. When the leveling roller 53 moves to below the feeding plate 222, the top of the leveling plate 532 abuts against the bottom of the agitator plate 2221 and continues to move to the right with the leveling roller 53. The agitator block drives the feeding plate 222 to rotate counterclockwise, shaking the rubber material accumulated on the feeding plate 222 and causing it to fall off. The leveling plate 532 continues to move and opens away from the agitator plate 2221. The feeding plate 222 resets under the action of the torsion spring on the hinge shaft and makes a slight impact on the baffle plate 2211, causing the feeding plate 221 to vibrate slightly. This makes it easier for the rubber material on the feeding plate 221 to flow downward along the curve of the feeding plate, facilitating the feeding operation. The baffle plate 2211 can also block the hinge shaft of the feeding plate 222 to prevent the rubber material from being trapped inside the hinge shaft and affecting the transmission.

[0043] The working principle and usage of the multi-stage screening device for this rubber compound production: The pneumatic conveyor 62 delivers the unsorted rubber compound from the front-end process to the storage tank 63 fixed on the feeding frame 61. The rubber compound is temporarily stored in the storage tank 63 and weighed. The rubber compound is then periodically or quantitatively conveyed to the feeding plate 221 in the feeding box 22. The rubber compound is fed into the screening box 2 by the feeding plate 221 and undergoes screening operations by the first screen 41, the second screen 42, and the third screen 43. According to the mesh size, the rubber compound is discharged from different outlets 25 and discharge structures 7. On the upper surface of the first screen 41, the leveling structure 5 operates. The leveling roller 53, in conjunction with the flat plate 532, reciprocates to continuously scrape and agitate the rubber compound, improving the screening effect. During the feeding process, the feeding plate 222, in conjunction with the flat plate 532, intermittently vibrates to ensure smooth feeding.

[0044] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A multi-stage screening device for rubber compound production, characterized in that, The system includes a screening frame (1), a screen structure (4), and a leveling structure (5). A feeding structure (6) is connected to one end of the screening frame (1), and a discharge structure (7) is located at the end furthest from the feeding structure (6). The screen structure (4) is located inside the screening frame (1) and includes a first screen element (41), a second screen element (42), and a third screen element (43) arranged sequentially from top to bottom. The leveling structure (5) is located inside the screening frame (1) and on top of the first screen element (41). The leveling structure (5) includes two conveyor chains. (51), a leveling drive (52), multiple leveling rollers (53) and multiple leveling rods (54), the two conveyor chains (51) are waist-shaped and installed on the front and rear sides inside the screening frame (1), the leveling drive (52) controls the transmission chain to rotate synchronously, the two ends of the leveling rods (54) are respectively fixed on the two conveyor chains (51) and the axis of the leveling rods (54) is perpendicular to the side of the conveyor chains (51), the leveling rollers (53) are set corresponding to the leveling rods (54) and sleeved on the leveling rods (54), and the first screen (41) is also provided with a partition plate (413).

2. The multi-stage screening device for rubber compound production according to claim 1, characterized in that, The screening frame (1) includes a screening box (2) and a screening support (3). The screening box (2) is installed on the screening support (3). Vibration springs (31) are provided at the top of the four corners of the screening support (3). One end of the vibration spring (31) is fixed to the bottom of the screening box (2), and the other end is fixed to the screening support (3). A vibration motor (21) is installed at the bottom of the screening box (2) near the feeding structure (6). A feeding box (22) is also provided on the screening box (2) corresponding to the feeding structure (6).

3. The multi-stage screening device for rubber compound production according to claim 2, characterized in that, The feeding structure (6) includes a feeding rack (61), a pneumatic conveyor (62), and a storage tank (63). The feeding rack (61) is located at one end of the screening frame (1). The storage tank (63) is installed on the feeding rack (61). The pneumatic conveyor (62) is connected to the top of the storage tank (63). A control valve (631) is also provided near the bottom of the storage tank (63). The bottom of the storage tank (63) extends into the feeding box (22). An inclined feeding plate (221) is also provided in the feeding box (22). The height of the feeding plate (221) near the screen structure (4) is lower than the height of the side away from the screen structure (4).

4. The multi-stage screening device for rubber compound production according to claim 3, characterized in that, The first screen component (41) includes a first screen frame (411) and a first screen plate (412) arranged along the length of the screening box (2). The first screen plate (412) is horizontally arranged and snapped into the bottom of the first screen frame (411). The second screen component (42) includes a second screen frame (421) and a second screen plate (422). The second screen plate (422) is snapped into the bottom of the second screen frame (421). The third screen component (43) includes a third screen frame (431) and a third screen plate (432). The third screen plate (432) is snapped into the third screen frame (411). 431) At the bottom of the inner part, the second screen plate (422) and the third screen plate (432) are both inclined and in opposite directions. The second screen plate (422) and the third screen plate (432) are both arranged along the length of the screening box (2) and are inclined toward the front or rear side of the screening box (2) respectively. The lower end of the second screen plate (422) is close to the upper end of the third screen plate (432). The first screen plate (412), the second screen plate (422) and the third screen plate (432) are all arranged with sieve holes (44) in an array, and the diameter of the sieve holes (44) decreases from top to bottom.

5. The multi-stage screening device for rubber compound production according to claim 4, characterized in that, A first guide plate (23) is also provided in the screening box (2) corresponding to the bottom of the first screen plate (412). The first guide plate (23) is relatively inclined at both ends in the screening box (2). The height of the end of the first guide plate (23) that is close to each other is lower than the height of the end of the first guide plate (23) that is far away from each other. A second guide plate (24) is also provided in the screening box (2) corresponding to the bottom of the second screen plate (422). The second guide plate (24) is relatively inclined at both ends in the screening box (2). The height of the end of the second guide plate (24) that is close to each other is lower than the height of the end of the second guide plate (24) that is far away from each other.

6. The multi-stage screening device for rubber compound production according to claim 4, characterized in that, The screening box (2) has several discharge ports (25) corresponding to the first screen (41), the second screen (42), and the third screen (43). The discharge ports (25) are located on the side wall and bottom of the screening box (2) away from the feeding structure (6). A discharge structure (7) is also provided at the discharge port (25). The discharge structure (7) includes a first discharge component (71), a second discharge component (72), a third discharge component (73), and a bottom discharge component (74). The first discharge component (71) extends and is located at the end of the screening box (2) away from the feeding structure (6). The first discharge component (71) is an open discharge hopper. The second discharge component (72) and the third discharge component (73) extend and are disposed on the side wall of the screening box (2) away from the feeding structure (6). The second discharge component (72) and the third discharge component (73) are respectively disposed on the front or rear side of the screening box (2). The second discharge component (72) and the third discharge component (73) have the same structure and are both discharge channels. The bottom discharge component (74) is disposed at the bottom of the screening box (2) away from the feeding structure (6). The bottom discharge component (74) is in the shape of a frustum with a diameter decreasing from top to bottom.

7. The multi-stage screening device for rubber compound production according to claim 4, characterized in that, A leveling structure (5) is provided above the first screen (41). The leveling roller (53) is reciprocally sliding on the first screen plate (412). The projection length of the conveyor chain (51) on the horizontal plane is less than the length of the first screen plate (412). Multiple material spreading protrusions (531) are arrayed on the outer peripheral wall of the leveling roller (53). A flat material plate (532) parallel to the leveling roller (53) is also provided on one side of the leveling roller (53). The flat material plate (532) is extended and fixed with the leveling rod (54) and is vertically arranged. The height of the flat material plate (532) is not less than the diameter of the leveling roller (53). When the leveling roller (53) is located on the upper side of the conveyor chain (51), the flat material plate (532) is located on the left side of the leveling roller (53).

8. The multi-stage screening device for rubber compound production according to claim 7, characterized in that, A material-pulling plate (222) is hinged to the bottom of the feeding plate (221). A torsion spring is sleeved on the hinge shaft between the material-pulling plate (222) and the feeding plate (221). A baffle plate (2211) extends vertically from the bottom of the feeding plate (221) and abuts against the upper surface of the material-pulling plate (222). Under normal conditions, the tilt angle of the material-pulling plate (222) is greater than the tilt angle of the feeding plate (221). A deflecting plate (2221) extends from the bottom of the material-pulling plate (222). When the flattening roller (53) moves to the bottom of the material-pulling plate (222), the top of the flattening plate (532) abuts against the bottom of the deflecting plate (2221).

Images