High tower granulation compound fertilizer screening device

Abstract

The invention relates to the technical field of compound fertilizer processing, in particular to a high tower granulation compound fertilizer screening device which comprises a screening barrel, a material control unit and a screening mechanism. According to the compound fertilizer screening device, after compound fertilizer falls into the screening mechanism, the compound fertilizer makes contact with the three screening plates in sequence from top to bottom, the three screening plates with the screening holes of different hole diameters screen the compound fertilizer in sequence through operation of the vibration set, and compound fertilizer particles of different sizes are separated; and the compound fertilizers with different particle sizes fall out through different discharging pipelines, the operation process of screening and separate placement of the compound fertilizers with various sizes is completed, the screening requirement is met, the screening effect is improved, an inclined strip corresponding to each screening plate drives a cleaning strip on the inclined strip to intermittently clean the corresponding screening plate, and the screening efficiency is improved. In conclusion, multiple times of screening operation of different hole diameters and intermittent cleaning of different screening plates are achieved, and blocking is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of compound fertilizer processing, in particular to a high-tower granulation compound fertilizer screening device. Background Art

[0002] High-tower granulation compound fertilizer is an advanced fertilizer production technology, which is manufactured through high-tower spray granulation process. This process can produce compound fertilizers with uniform particle size, high nutrient content and good physical properties. However, even with the high-tower granulation technology, the size of the fertilizer particles produced may vary. Therefore, in order to ensure the consistency of product quality and meet the market demand for fertilizers of different specifications, screening treatment is usually required to improve the overall quality of the product.

[0003] In response to the above-mentioned screening needs, the Chinese utility model patent with publication number CN216368935U discloses a high-tower compound fertilizer screening equipment. This solution can be achieved through the cooperation between the fixed rod and the arc-shaped pusher block. When the screening box is shaken up and down, the arc-shaped pusher block and the fixed rod will penetrate the screening hole, and the material blocking the screening hole will be pushed back into the screening box, which can effectively prevent the screening hole from being blocked by the material.

[0004] The Chinese utility model patent with publication number CN211275379U discloses a high-tower compound fertilizer screening equipment, which is provided with a rotating rod and a protrusion. The protrusion of the rotating rod can be extended into the sieve hole on the same side, and the protrusion of the rotating rod squeezes the material blocked in the sieve hole. At the same time, the drum drives the rotating rod to rotate, and the rotating rod drives the protrusion to clean the sieve holes at different positions, which can reduce the blockage of the sieve holes and ensure the smooth discharge of materials. There is no need to stop the machine for manual cleaning, which is conducive to improving the screening efficiency.

[0005] The first technical solution mentioned above can meet the screening needs of a single-size aperture and solve the problem of clogging of the screening holes during the screening process of the single aperture size. However, in actual use, there are many screening sizes of compound fertilizers, and it is difficult to meet the screening needs through a single-layer screening operation. If it is necessary to achieve the screening needs of multiple layers with different apertures, the above two technical solutions are difficult to meet. At the same time, the second technical solution mentioned above only squeezes the sieve holes by a rotating rod, and the cleaning effect is not ideal. The problem of clogging of the screening holes will still occur, affecting the screening operation. Summary of the invention

[0006] Based on this, it is necessary to provide a high-tower granulation compound fertilizer screening device to solve the problems of the above-mentioned prior art.

[0007] The present application provides a high-tower granulation compound fertilizer screening device, comprising: a screening barrel with openings at the top and the bottom, a mounting frame fixedly provided on the upper end surface of the screening barrel, a rotating shaft with a vertical axis rotatably provided on the mounting frame, and a material control unit and a screening mechanism are sequentially arranged in the screening barrel from top to bottom.

[0008] The material control unit includes a fixed plate, which is fixedly arranged in the screening barrel. The rotating shaft rotates through the fixed plate, and three circumferentially distributed fan-shaped grooves are opened on the fixed plate. A fan-shaped partition plate is fixedly arranged between the inner wall of the fan-shaped groove and the screening barrel. The partition plate divides the fan-shaped groove into working area one, a partition area and working area two.

[0009] The screening mechanism includes horizontal bars, and two left-right symmetrical horizontal bars are installed on the screening barrel which slide up and down and penetrate through the bars, and three truncated cone-shaped screening plates are arranged between the left and right horizontal bars, and the upper and lower ends of the screening plates are both open with their small diameter ends facing downward, and the diameters of the small diameter ends of the three screening plates increase successively from top to bottom; a discharge pipe is fixedly arranged on the lower end surface of the screening plate, the uppermost screening plate is fixedly connected to the horizontal bar, and two adjacent screening plates are fixedly connected by two fixed bars distributed on the left and right, and a plurality of circumferentially evenly distributed screening holes are opened on the screening plates, and the apertures of the screening holes on the three screening plates decrease successively from top to bottom, a vibration group is arranged on the screening barrel, and an anti-blocking unit for preventing the screening plate from being blocked is arranged in the screening barrel.

[0010] According to a favorable embodiment, the material control unit also includes a rotating plate, and a fixed sleeve on the rotating shaft is provided with a rotating plate located above the fixed plate, and three circumferentially distributed and fan-shaped material drop grooves are opened on the rotating plate, and the fan-shaped area of ​​the material drop grooves is the same as the operating area of ​​the operating area one and the operating area two.

[0011] According to an advantageous embodiment, a positive truncated cone is fixedly provided on the lower end surface of the mounting frame, the rotating shaft passes through the truncated cone and the truncated cone is located between the mounting frame and the fixed plate.

[0012] According to a favorable embodiment, the vibration group includes a fixed block, the screening barrel is fixedly provided with a fixed block corresponding one-to-one to the horizontal bar and located below the horizontal bar, a spring is fixedly provided between the fixed block and the horizontal bar, and a driving shaft with two axes extending from left to right and symmetrical to the left and right is rotatably provided on the screening barrel, and a cam located above the horizontal bar is fixedly sleeved on the driving shaft.

[0013] According to a favorable embodiment, the screening mechanism also includes an annular sleeve, and the upper and lower sliding sleeves on the rotating shaft are provided with an annular sleeve located in the annular area of ​​the uppermost screening plate, and the upper and lower sliding sleeves on the annular sleeve, the innermost discharge pipe and the middle discharge pipe are all provided with a connecting sleeve, and a plurality of circumferentially distributed connecting strips are rotatably arranged on the connecting sleeve, and inclined strips located above the inner annular surfaces of adjacent screening plates are fixedly arranged on the connecting strips, and the relative cross-sections of adjacent screening plates corresponding to the inclined strips and the connecting strips are parallel, and a delay group is arranged on the inclined strips, and the delay group includes an annular plate 1, and all inclined strips within the same height are fixedly provided with a plurality of plate groups equidistantly arranged along the length direction of the inclined strips toward the end face of the rotating shaft, and the plate group includes annular plate 1 and annular plate 2 from top to bottom, and the cross-section of annular plate 1 is inclined from top to bottom toward the direction close to the rotating shaft, and the cross-section of annular plate 2 is inclined from top to bottom toward the direction away from the rotating shaft.

[0014] According to a favorable embodiment, the delay group further comprises a guide member, and a hollow truncated cone guide member is fixedly provided on the second annular plate on the topmost inclined bar, the small diameter end of the guide member faces upward, and the plurality of guide members decrease in proportion from top to bottom.

[0015] According to a preferred embodiment, the anti-blocking unit includes an arc-shaped bar, and the inclined bar is fixedly provided with two arc-shaped bars distributed along its length direction, and the arc-shaped bar is located at the lower side of the inclined bar. The two arc-shaped bars corresponding to the same inclined bar are commonly fixed with a plurality of cleaning brush strips located below the arc-shaped bar, and the plurality of cleaning brush strips corresponding to the same inclined bar are distributed in a fan shape about the axis of the rotating shaft.

[0016] According to a favorable embodiment, the anti-blocking unit also includes an L-shaped bar, an L-shaped bar passing through the screening barrel is fixedly arranged on the inclined bar on the front side, an L-shaped bar passing through the screening barrel is provided with an L-shaped groove corresponding to the L-shaped bar, the L-shaped bar is slidably arranged in the L-shaped groove corresponding to it, a T-shaped plate is fixedly arranged on the front end surfaces of the three L-shaped bars, an L-shaped rotating part is fixedly sleeved on the rotating shaft, a push plate is fixedly arranged on the vertical section of the rotating part, and the push plate is successively composed of an inclined section and a horizontal section inclined from top to bottom to the right from left to right, an L-shaped frame is fixedly arranged on the horizontal section of the push plate, and a push block passing through the push plate is slidably arranged on the horizontal section of the L-shaped frame through a moving column, and a spring 2 sleeved on the moving column is fixedly arranged between the push block and the L-shaped frame.

[0017] According to a favorable embodiment, the anti-blocking unit also includes a connecting piece, and a reset plate located above the horizontal section of the T-shaped plate is fixedly provided on the screening barrel through the connecting piece, the reset plate is inclined downward from left to right, a matching strip is fixedly provided on the upper end surface of the moving column, and a spring telescopic rod is hingedly provided between the T-shaped plate and the screening barrel.

[0018] According to a favorable embodiment, the screening mechanism also includes guide blocks, which are fixedly arranged between the screening barrel and the outermost discharge pipe, between the outermost discharge pipe and the middle discharge pipe, and between the middle discharge pipe and the innermost discharge pipe. The three guide blocks are distributed alternately from top to bottom and left to right, and the cross-section of the guide block is a right triangle with the inclined surface facing the rotating axis.

[0019] In summary, the present invention includes at least one of the following beneficial effects: 1. In the present invention, after the compound fertilizer falls into the screening mechanism, it contacts three screening plates from top to bottom in turn, and through the operation of the vibration group, the three screening plates with screening holes of different apertures screen the compound fertilizer in turn, separate the compound fertilizer particles of different sizes, and make the compound fertilizers of different particle sizes fall out through different discharge pipes, completing the screening and separate placement of compound fertilizers of various sizes, meeting the screening requirements, and improving the screening effect. The inclined bar corresponding to each screening plate drives the cleaning brush bar thereon to intermittently clean the corresponding screening plate, ensuring that the function of the screening plate meets the requirements. In summary, multiple screening operations of different apertures and intermittent cleaning of different screening plates are realized to prevent blockage.

[0020] Second, in the present invention, intermittent feeding is performed by intermittently staggering the feeding trough and the fan-shaped groove on the rotating plate, thereby controlling the frequency and amount of compound fertilizer input into the screening mechanism, and avoiding affecting the screening quality or causing blockage due to excessive amount of compound fertilizer input.

[0021] 3. In the present invention, the annular plate 1 and the annular plate 2 in the same plate group cooperate with each other to slow down the speed at which the compound fertilizer falls from top to bottom, thereby avoiding the problem that the compound fertilizer is not screened due to the excessively fast falling speed and directly falls out of the discharge pipe. Secondly, the contact frequency between the compound fertilizer and the screening plate is increased, and the screening effect of the screening plate on the compound fertilizer is improved, thereby avoiding that part of the compound fertilizer does not fully contact with the screening plate and directly falls out of the corresponding discharge pipe.

[0022] 4. When the screening plate in the present invention needs to be cleaned, the inclined bar in the anti-blocking unit drives the cleaning brush bar to press down against the corresponding screening plate to ensure close contact between the two and improve the cleaning effect of subsequent cleaning operations. When cleaning is not needed, the cleaning brush bar is away from the corresponding screening plate to avoid the cleaning brush bar occupying the space required for screening of the screening plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a high-tower granulation compound fertilizer screening device provided according to an embodiment of the present invention is shown.

[0025] Figure 2 A front view of a high-tower granulation compound fertilizer screening device provided according to an embodiment of the present invention is shown in section.

[0026] Figure 3 A partial cross-sectional schematic diagram between a screening barrel, a frustum and a rotating plate provided according to an embodiment of the present invention is shown.

[0027] Figure 4 A schematic diagram of a partial cross-sectional three-dimensional structure between a horizontal bar, annular plate 1 and annular plate 2 provided according to an embodiment of the present invention is shown.

[0028] Figure 5 A schematic diagram of a partial cross-sectional three-dimensional structure between an annular plate 1, annular plate 2 and an inclined plate provided according to an embodiment of the present invention is shown.

[0029] Figure 6 A partial cross-sectional stereoscopic schematic diagram of the screening barrel, the push plate and the reset plate provided according to an embodiment of the present invention is shown.

[0030] Figure 7 A schematic diagram of the three-dimensional structure among a T-shaped plate, a pushing block and a matching strip provided according to an embodiment of the present invention is shown.

[0031] Figure 8 A schematic diagram of the three-dimensional structure among a pushing plate, a pushing block and a matching strip provided according to an embodiment of the present invention is shown.

[0032] Fig. 9 A schematic diagram of a partial cross-sectional three-dimensional structure between a screening barrel, a discharge pipe and a guide block provided according to an embodiment of the present invention is shown.

[0033] The above drawings include the following reference numerals: 1, screening barrel; 2, rotating shaft; 3, material control unit; 30, fixed plate; 300, fan-shaped groove; 301, partition plate; 31, rotating plate; 310, material drop chute; 32, round table; 4, screening mechanism; 40, horizontal bar; 400, screening plate; 401, discharge pipe; 402, screening hole; 41, vibration group; 410, fixed block; 411, spring 1; 412, driving shaft; 413, cam; 42, annular sleeve; 420, connecting bar; 421, tilt Strip; 422, connecting sleeve; 43, annular plate one; 430, annular plate two; 431, guide member; 44, anti-blocking unit; 440, arc strip; 441, cleaning brush strip; 442, L-shaped strip; 443, L-shaped groove; 444, T-shaped plate; 445, rotating member; 446, pushing plate; 447, L-shaped frame; 448, pushing block; 449, spring two; 45, reset plate; 450, matching strip; 451, spring telescopic rod; 46, guide block; 5, working area one; 6, partition area; 7, working area two. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] like Figure 1 and Figure 2 As shown, a high-tower granulation compound fertilizer screening device comprises: a screening barrel 1 with openings at the top and the bottom, a mounting frame is fixedly provided on the upper end surface of the screening barrel 1, a rotating shaft 2 with a vertical axis is rotatably provided on the mounting frame, the rotating shaft 2 is connected to an external motor 1 (not shown in the figure), and a material control unit 3 and a screening mechanism 4 are arranged in the screening barrel 1 from top to bottom.

[0036] like Figure 1 and Figure 3 As shown, the material control unit 3 includes a fixed plate 30, the fixed plate 30 is fixedly arranged in the screening barrel 1, the rotating shaft 2 rotates and penetrates the fixed plate 30, three circumferentially distributed fan-shaped grooves 300 are opened on the fixed plate 30, and a fan-shaped partition plate 301 is fixedly arranged between the inner wall of the fan-shaped groove 300 and the screening barrel 1, and the partition plate 301 divides the fan-shaped groove 300 into an operating area 1 5, a partition area 6 and an operating area 2 7.

[0037] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the screening mechanism 4 includes horizontal bars 40, and two horizontal bars 40 are symmetrically installed on the screening barrel 1, which slide up and down and penetrate through the bars. Three truncated cone-shaped screening plates 400 are arranged between the two horizontal bars 40. The upper and lower ends of the screening plates 400 are open and their small diameter ends are downward, and the diameters of the small diameter ends of the three screening plates 400 increase successively from top to bottom. A discharge pipe 401 is fixedly arranged on the lower end surface of the screening plate 400, and the uppermost screening plate 400 is fixedly connected to the horizontal bar 40, and the two adjacent screening plates 400 are fixedly connected by two fixed bars distributed on the left and right. A plurality of circumferentially uniformly distributed screening holes 402 are opened on the screening plate 400, and the apertures of the screening holes 402 on the three screening plates 400 decrease successively from top to bottom. A vibration group 41 is arranged on the screening barrel 1, and an anti-blocking unit 44 for preventing the screening plate 400 from being blocked is arranged in the screening barrel 1.

[0038] During operation, the staff pours the compound fertilizer to be screened into the upper opening of the screening barrel 1, and at the same time, the external motor 1 drives the rotating shaft 2 to rotate synchronously. The rotation of the rotating shaft 2 causes the material control unit 3 to operate, and controls the compound fertilizer to intermittently fall into the screening mechanism 4, so that the working area 1 5 and the working area 2 7 intermittently perform material unloading operations. During the unloading process, the compound fertilizer unloaded into the screening mechanism 4 contacts the three screening plates 400 in sequence, and the vibration group 41 works to make the screening plate 400 vibrate up and down, and screens the compound fertilizer through the screening holes 402 thereon, separates compound fertilizer particles of different sizes, and makes compound fertilizers of different particle sizes fall out through different discharge pipes 401, and finally manually collects the screened compound fertilizer, and during the rotation of the rotating shaft 2, the anti-blocking unit 44 works, and the anti-blocking unit 44 corresponds to the intermittent rotation of the partition area 6, and cleans the screening areas on the three screening plates 400 to prevent the screening holes 402 from being blocked and affecting the screening function.

[0039] like Figure 1 and Figure 3 As shown, the material control unit 3 also includes a rotating plate 31, and the rotating shaft 2 is fixedly sleeved with a rotating plate 31 located above the fixed plate 30, and the rotating plate 31 is provided with three circumferentially distributed and fan-shaped material drop grooves 310, and the fan-shaped area of ​​the material drop grooves 310 is the same as the working area of ​​the working area 1 5 and the working area 2 7.

[0040] like Figure 1 and Figure 3 As shown, a right-placed truncated cone 32 is fixedly provided on the lower end surface of the mounting frame, the rotating shaft 2 passes through the truncated cone 32 and the truncated cone 32 is located between the mounting frame and the fixed plate 30 .

[0041] It should be noted that the coverage areas of the working area 1 5 , the working area 2 7 and the separation area 6 are the same, and the working area 1 5 and the working area 2 7 in the same sector-shaped slot 300 are respectively located on both sides of the separation area 6 .

[0042] After the staff puts the compound fertilizer to be screened into the screening barrel 1, the external motor drives the rotating shaft 2 to rotate synchronously, and the set round table 32 guides the compound fertilizer to move to the area where the fan-shaped groove 300 is located through its circumferential surface to assist the compound fertilizer unloading process. Then the rotating shaft 2 drives the rotating plate 31 to rotate synchronously. When the drop groove 310 on the rotating plate 31 is opposite to the working area 1 5 in the fan-shaped groove 300, the rotating plate 31 blocks the working area 2 7 and the partition area 6 in the fan-shaped groove 300, and the working area 1 5 is in an open state, and the compound fertilizer put in passes through The working area 1 5 falls downward into the screening mechanism 4. When the rotating shaft 2 drives the rotating plate 31 to rotate continuously, the material chute 310 on the rotating plate 31 is opposite to the partition area 6, the material chute 310 is blocked by the partition plate 301, and the working area 1 5 and the working area 2 7 are both in a closed state. At this time, the screening plate 400 is subjected to anti-blocking cleaning operations. After that, the rotating plate 31 continues to rotate, and when the material chute 310 is opposite to the working area 2 7 in the fan-shaped groove 300, the working area 1 5 and the partition area 6 are in a blocked state, and the compound fertilizer falls downward into the screening mechanism 4 through the working area 2 7.

[0043] By intermittent feeding in the above manner, the frequency and amount of compound fertilizer input into the screening mechanism 4 are controlled to avoid the problem of affecting the screening quality or causing blockage due to excessive input of compound fertilizer. Secondly, during the intermittent feeding process, the anti-blocking unit 44 cleans the screening plate 400 to ensure the continuous screening effect of the screening plate 400.

[0044] like Figure 1 and Figure 2 As shown, the vibration group 41 includes a fixed block 410, and the screening barrel 1 is fixedly provided with a fixed block 410 corresponding to the horizontal bar 40 one by one and located below the horizontal bar 40, and a spring 1 411 is fixedly provided between the fixed block 410 and the horizontal bar 40, and a driving shaft 412 with two axes extending from left to right and symmetrical to the left and right is rotatably provided on the screening barrel 1, and a cam 413 located above the horizontal bar 40 is fixedly sleeved on the driving shaft 412, and the driving shaft 412 is connected to an external motor 2 (not shown in the figure).

[0045] During operation, when the compound fertilizer enters the screening mechanism 4, the external motor 2 drives the drive shaft 412 to rotate synchronously, and the drive shaft 412 drives the cam 413 thereon to rotate synchronously. The elastic force generated by the deformation of the spring 1 411 which is in a compressed state in the initial state makes the horizontal bar 40 close to the corresponding cam 413. Therefore, during the rotation of the cam 413 throughout a circle, the horizontal bar 40 can move back and forth quickly up and down. The horizontal bar 40 drives all the screening plates 400 to move back and forth quickly and slightly up and down through the fixed bar, thereby assisting the screening plates 400 in the screening process of the compound fertilizer. The vibration generated in the above process is also conducive to the falling of the compound fertilizer during the unloading process.

[0046] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the screening mechanism 4 also includes an annular sleeve 42, the rotating shaft 2 is provided with an annular sleeve 42 located in the annular region of the uppermost screening plate 400, the annular sleeve 42, the innermost discharge pipe 401 and the middle discharge pipe 401 are all provided with a connecting sleeve 422 which is slidably provided up and down, a plurality of circumferentially distributed connecting strips 420 are rotatably provided on the connecting sleeve 422, an inclined strip 421 located above the inner annular surface of the adjacent screening plate 400 is fixedly provided on the connecting strip 420, and the inclined strip 421 and the connecting strip 422 are connected to each other. 0 The corresponding adjacent screening plates 400 are parallel to each other in cross-section, a delay group is arranged on the inclined bar 421, the delay group includes an annular plate 1 43, and all the inclined bars 421 in the same height are fixedly provided with a plurality of plate groups arranged equidistantly along the length direction of the inclined bars 421 on the end surface facing the rotating shaft 2, and the plate group includes an annular plate 1 43 and an annular plate 2 430 from top to bottom, the cross-section of the annular plate 1 43 is inclined from top to bottom toward the direction close to the rotating shaft 2, and the cross-section of the annular plate 2 430 is inclined from top to bottom toward the direction away from the rotating shaft 2.

[0047] like Figure 1 and Figure 4 As shown, the delay group also includes a guide member 431, and a hollow truncated cone-shaped guide member 431 is fixedly provided on the annular plate 2 430 on the topmost inclined bar 421, and the small diameter end of the guide member 431 faces upward, and multiple guide members 431 are proportionally reduced from top to bottom.

[0048] During operation, the compound fertilizer falls into the screening mechanism 4 through the material control unit 3, and falls from top to bottom along the screening plate 400 for screening. In the process, the annular plate 1 43 and the annular plate 2 430 in the same plate group cooperate with each other to delay the speed of the compound fertilizer falling from top to bottom, so as to avoid the problem that the compound fertilizer falls directly from the discharge pipe 401 without being screened due to excessive falling speed. The annular plate 1 43 and the annular plate 2 430 in one group of plate groups are used as an example for explanation. After the compound fertilizer falls onto the annular plate 1 43, it falls onto the annular plate 2 430 along its circumferential inclined surface, and then falls back onto the screening plate 400 along the annular plate 2 430. The above method increases the contact frequency between the compound fertilizer and the screening plate 400, improves the screening effect of the screening plate 400 on the compound fertilizer, and avoids that some compound fertilizers do not fully contact with the screening plate 400 and fall out of the corresponding discharge pipe 401 without being screened.

[0049] When the compound fertilizer falls from the material control unit 3 to the uppermost screening plate 400, the circumferential surface of the guide 431 guides the compound fertilizer to fall onto the screening plate 400 or the corresponding annular plate 43, thereby preventing the compound fertilizer from falling directly from the innermost discharge pipe 401.

[0050] like Figure 1 , Figure 4 and Figure 5 As shown, the anti-blocking unit 44 includes an arc-shaped bar 440, and the inclined bar 421 is fixedly provided with two arc-shaped bars 440 distributed along its length direction, and the arc-shaped bar 440 is located at the lower side of the inclined bar 421, and the two arc-shaped bars 440 corresponding to the same inclined bar 421 are commonly fixed with a plurality of cleaning brush strips 441 located below the arc-shaped bar 440, and the plurality of cleaning brush strips 441 corresponding to the same inclined bar 421 are distributed in a fan shape about the axis of the rotating shaft 2.

[0051] like Figure 1 , Figure 6 and Figure 7 As shown, the anti-blocking unit 44 also includes an L-shaped bar 442, and the front side of the inclined bar 421 is fixedly provided with an L-shaped bar 442 that passes through the screening barrel 1, and the screening barrel 1 is provided with an L-shaped groove 443 that corresponds to the L-shaped bar 442 one by one, and the L-shaped bar 442 is slidably arranged in the L-shaped groove 443 corresponding thereto, and the front end surfaces of the three L-shaped bars 442 are commonly fixedly provided with a T-shaped plate 444, and an L-shaped rotating member 445 is fixedly sleeved on the rotating shaft 2, and a push plate 446 is fixedly provided on the vertical section of the rotating member 445, and the push plate 446 is sequentially composed of an inclined section and a horizontal section that are inclined from top to bottom to the right from left to right, and an L-shaped frame 447 is fixedly provided on the horizontal section of the push plate 446, and the horizontal section of the L-shaped frame 447 is provided with a push block 448 that passes through the push plate 446 and slides up and down through a moving column, and a spring 2 449 sleeved on the moving column is commonly fixedly provided between the push block 448 and the L-shaped frame 447.

[0052] like Figure 1 , Figure 6 and Figure 8 As shown, the anti-blocking unit 44 also includes a connecting piece, and a reset plate 45 located above the horizontal section of the T-shaped plate 444 is fixedly provided on the screening barrel 1 through the connecting piece. The reset plate 45 is inclined downward from left to right, and a matching strip 450 is fixedly provided on the upper end surface of the movable column. A spring telescopic rod 451 is hingedly provided between the T-shaped plate 444 and the screening barrel 1.

[0053] It should be noted that the L-shaped groove 443 is opposite to one of the partition plates 301 , that is, the partition area 6 in the corresponding fan-shaped groove 300 corresponds to the horizontal movement area of ​​the L-shaped strip 442 .

[0054] During operation, when the rotating shaft 2 drives the rotating plate 31 to rotate, in the process that the blanking trough 310 gradually staggers with the working area 1 5 or the working area 2 7, the working area 2 7 or the working area 1 5 in the same fan-shaped trough 300 is always covered by the rotating plate 31, that is, in the process that the rotating plate 31 gradually covers all the working areas 1 5 and 2 7, the rotating shaft 2 drives the pushing plate 446 to move to the right area of ​​the T-shaped plate 444 through the rotating member 445. As the rotating shaft 2 continues to rotate, the inclined section of the pushing plate 446 contacts the horizontal section of the T-shaped plate 444, so that the T-shaped plate 444 first drives all the L-shaped bars 442 to move downward synchronously, and the L-shaped bars 442 drive all the inclined bars 421 to move downward, so that the horizontal section of the T-shaped plate 444 moves to the horizontal section of the pushing plate 446. Directly below, it should be noted that in this process, after the inclined bar 421 drives all the cleaning brush strips 441 to move downward and contact the corresponding screening plate 400, the screening plate 400 will be pressed down, so that the spring 411 is compressed and the horizontal bar 40 is away from the corresponding cam 413. Finally, the horizontal bar 40 is not in contact with the cam 413, so as to avoid being affected by the rotation of the cam 413 during the cleaning process. Through the above method, the screening plate 400 is tightly attached to the cleaning brush strip 441, and part of the cleaning brush strip 441 can be inserted into the screening hole 402 on the corresponding screening plate 400 during the cleaning process, so as to improve the cleaning effect. When cleaning is not needed, the cleaning brush strip 441 is away from the corresponding screening plate 400 to avoid the cleaning brush strip 441 occupying the space required for screening of the screening plate 400.

[0055] In the initial state, the lower end of the pushing block 448 is located below the horizontal section of the pushing plate 446. Therefore, with the continuous rotation of the rotating shaft 2, the pushing plate 446 drives the pushing block 448 to push the T-shaped plate 444 to move synchronously. The T-shaped plate 444 drives all the inclined bars 421 to rotate synchronously through the L-shaped bar 442. The spring telescopic rod 451 is stretched, and the inclined bar 421 drives all the cleaning brush bars 441 thereon to rotate synchronously through the arc bar 440, so that the main part of the cleaning brush bar 441 scrapes the surface of the cleaning screen plate 400, and the bristles on the main part (not shown in the figure) clean the screening holes 402, thereby ensuring that the screening function of the screening plate 400 meets the requirements.

[0056] As the rotating member 445 drives the pushing plate 446 to continue to rotate, when the L-shaped bar 442 is about to move to the leftmost side of the corresponding L-shaped groove 443, the matching bar 450 contacts the reset plate 45, so that the matching bar 450 drives the pushing block 448 to rise, so the pushing block 448 stops pushing the T-shaped plate 444 and the L-shaped bar 442 to move, and the rotating member 445 drives the pushing plate 446 to continue to rotate. At this time, the elastic force generated by the deformed spring telescopic rod 451 causes the L-shaped bar 442 and the cleaning brush bar 441 to reset, which is convenient for subsequent cleaning.

[0057] like Figure 1 , Figure 2 and Fig. 9 As shown, the screening mechanism 4 also includes a guide block 46. A guide block 46 is fixedly arranged between the screening barrel 1 and the outermost discharge pipe 401, between the outermost discharge pipe 401 and the middle discharge pipe 401, and between the middle discharge pipe 401 and the innermost discharge pipe 401. The three guide blocks 46 are distributed alternately from top to bottom and left to right, and the cross-section of the guide block 46 is a right triangle with the inclined surface facing the rotating shaft 2.

[0058] During operation, compound fertilizers of different particle sizes are screened and separated through a multi-stage screening process of multiple screening plates 400, and fall out from a plurality of channels, including the area between the screening barrel 1 and the outermost discharge pipe 401, the area between the outermost discharge pipe 401 and the middle discharge pipe 401, the area between the middle discharge pipe 401 and the innermost discharge pipe 401, and the area inside the middle discharge pipe 401. At the same time, the compound fertilizers falling out of the above-mentioned different paths are guided by a plurality of guide blocks 46 for easy collection, thereby avoiding re-mixing of the screened compound fertilizers of different sizes.

[0059] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high tower granulation compound fertilizer screening device, characterized in that: include: A screening barrel (1) is open at both the top and the bottom, a mounting frame is fixedly provided on the upper end surface of the screening barrel (1), a rotating shaft (2) with a vertical axis is rotatably provided on the mounting frame, and a material control unit (3) and a screening mechanism (4) are sequentially provided in the screening barrel (1) from top to bottom; The material control unit (3) comprises a fixed plate (30), the fixed plate (30) is fixedly arranged in the screening barrel (1), the rotating shaft (2) rotates and penetrates the fixed plate (30), three circumferentially distributed fan-shaped grooves (300) are opened on the fixed plate (30), a fan-shaped partition plate (301) is fixedly arranged between the inner wall of the fan-shaped groove (300) and the screening barrel (1), and the partition plate (301) divides the fan-shaped groove (300) into an operating area 1 (5), a partition area (6) and an operating area 2 (7); The screening mechanism (4) comprises a horizontal bar (40), two horizontal bars (40) are symmetrically installed on the screening barrel (1) and slide up and down and penetrate through the two horizontal bars (40), three truncated cone-shaped screening plates (400) are arranged between the two horizontal bars (40), the upper and lower ends of the screening plates (400) are both open and the small diameter ends thereof face downward, and the diameters of the small diameter ends of the three screening plates (400) increase in sequence from top to bottom, a discharge pipe (401) is fixedly arranged on the lower end surface of the screening plate (400), and the uppermost screening plate (400) is provided with a discharge pipe (401). The screening plate (400) is fixedly connected to the horizontal bar (40), and two adjacent screening plates (400) are fixedly connected via two fixing bars distributed on the left and right. The screening plates (400) are each provided with a plurality of screening holes (402) evenly distributed in the circumferential direction, and the apertures of the screening holes (402) on the three screening plates (400) decrease from top to bottom. A vibration group (41) is provided on the screening barrel (1), and an anti-blocking unit (44) for preventing the screening plates (400) from being blocked is provided in the screening barrel (1).

2. A high tower granulation compound fertilizer screening device according to claim 1, characterized in that: The material control unit (3) further comprises a rotating plate (31), the rotating shaft (2) is fixedly sleeved with the rotating plate (31) located above the fixed plate (30), and the rotating plate (31) is provided with three circumferentially distributed and fan-shaped material dropping grooves (310).

3. A high tower granulation compound fertilizer screening device according to claim 1, characterized in that: A positively placed truncated table (32) is fixedly provided on the lower end surface of the mounting frame, the rotating shaft (2) passes through the truncated table (32), and the truncated table (32) is located between the mounting frame and the fixed plate (30).

4. A high tower granulation compound fertilizer screening device according to claim 1, characterized in that: The vibration group (41) comprises a fixed block (410), the screening barrel (1) is fixedly provided with a fixed block (410) corresponding to the horizontal bar (40) one by one and located below the horizontal bar (40), a spring (411) is fixedly provided between the fixed block (410) and the horizontal bar (40), the screening barrel (1) is rotatably provided with a driving shaft (412) having two axes extending from left to right and being symmetrical on both sides, and a cam (413) located above the horizontal bar (40) is fixedly sleeved on the driving shaft (412).

5. A high tower granulation compound fertilizer screening device according to claim 1, characterized in that: The screening mechanism (4) further comprises an annular sleeve (42), the rotating shaft (2) being provided with an annular sleeve (42) located in the annular region of the uppermost screening plate (400), the annular sleeve (42), the innermost discharge pipe (401) and the middle discharge pipe (401) being provided with a connecting sleeve (422) being provided with an upper and lower sliding sleeve, a plurality of circumferentially distributed connecting strips (420) being rotatably provided on the connecting sleeve (422), an inclined strip (421) being located above the inner annular surface of the adjacent screening plate (400) being fixedly provided on the connecting strip (420), and the inclined strip (421) and the connecting strip (422) being connected to each other. The adjacent sieve plates (400) corresponding to each other are parallel to each other in cross-section. A delay group is arranged on the inclined bar (421), and the delay group includes an annular plate 1 (43). All inclined bars (421) at the same height are fixedly provided with a plurality of plate groups arranged equidistantly along the length direction of the inclined bar (421) on the end faces facing the rotating shaft (2). The plate groups include annular plate 1 (43) and annular plate 2 (430) from top to bottom. The cross-section of the annular plate 1 (43) is inclined from top to bottom in a direction close to the rotating shaft (2), and the cross-section of the annular plate 2 (430) is inclined from top to bottom in a direction away from the rotating shaft (2).

6. A high tower granulation compound fertilizer screening device according to claim 5, characterized in that: The delay group also includes a guide member (431), and a hollow truncated cone guide member (431) is fixedly provided on the second annular plate (430) on the uppermost inclined strip (421), the small diameter end of the guide member (431) faces upward, and the plurality of guide members (431) are proportionally reduced from top to bottom.

7. A high tower granulation compound fertilizer screening device according to claim 5, characterized in that: The anti-blocking unit (44) comprises an arc-shaped bar (440), and the inclined bar (421) is fixedly provided with two arc-shaped bars (440) distributed along its length direction, and the arc-shaped bar (440) is located at the lower side of the inclined bar (421), and the two arc-shaped bars (440) corresponding to the same inclined bar (421) are commonly fixedly provided with a plurality of cleaning brush bars (441) located below the arc-shaped bar (440), and the plurality of cleaning brush bars (441) corresponding to the same inclined bar (421) are distributed in a fan shape about the axis of the rotating shaft (2).

8. A high tower granulation compound fertilizer screening device according to claim 5, characterized in that: The anti-blocking unit (44) further comprises an L-shaped bar (442), the front inclined bar (421) is fixedly provided with an L-shaped bar (442) penetrating the screening barrel (1), the screening barrel (1) is provided with an L-shaped groove (443) corresponding to the L-shaped bar (442), the L-shaped bar (442) is slidably arranged in the corresponding L-shaped groove (443), the front end surfaces of the three L-shaped bars (442) are fixedly provided with a T-shaped plate (444), and the rotating shaft (2) is fixedly provided with an L-shaped rotating member (445) A push plate (446) is fixedly provided on the vertical section of the rotating member (445), and the push plate (446) is composed of an inclined section and a horizontal section which are inclined rightward from top to bottom from left to right. An L-shaped frame (447) is fixedly provided on the horizontal section of the push plate (446), and a push block (448) which penetrates the push plate (446) is provided on the horizontal section of the L-shaped frame (447) so as to slide up and down through a moving column, and a spring (449) which is sleeved on the moving column is fixedly provided between the push block (448) and the L-shaped frame (447).

9. A high tower granulation compound fertilizer screening device according to claim 8, characterized in that: The anti-blocking unit (44) also includes a connecting piece, and a reset plate (45) located above the horizontal section of the T-shaped plate (444) is fixedly arranged on the screening barrel (1) through the connecting piece, the reset plate (45) is inclined downward from left to right, a matching strip (450) is fixedly arranged on the upper end surface of the movable column, and a spring telescopic rod (451) is hingedly arranged between the T-shaped plate (444) and the screening barrel (1).

10. A high tower granulation compound fertilizer screening device according to claim 1, characterized in that: The screening mechanism (4) further comprises guide blocks (46), wherein guide blocks (46) are fixedly arranged between the screening barrel (1) and the outermost discharge pipe (401), between the outermost discharge pipe (401) and the middle discharge pipe (401), and between the middle discharge pipe (401) and the innermost discharge pipe (401), and the three guide blocks (46) are staggeredly arranged from top to bottom and left to right, and the cross section of the guide block (46) is a right triangle with the inclined surface facing the rotating shaft (2).

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