A screening machine for fertilizer production

Abstract

The application discloses a screening machine for fertilizer production and relates to the technical field of fertilizer manufacturing, which comprises a rack, a dust cover fixedly installed on the rack, a sieve cylinder installed on the rack, and a plurality of sieve screens capable of being spliced and completely covering the cylinder wall of the sieve cylinder. The installation assembly comprises a plurality of hydraulic cylinders which are provided in the same number as the sieve screens, the fixed end of each hydraulic cylinder is installed on the dust cover, the movable end of each hydraulic cylinder is connected with a sieve screen, the length extension of each hydraulic cylinder can drive the sieve screen to approach the sieve cylinder and abut against the cylinder wall of the sieve cylinder, so that each warp of the sieve screen can be located between two adjacent warps of the sieve cylinder, and the fixing assembly can detachably connect the sieve screen with the sieve cylinder. The application can improve the universality of the fertilizer screening machine in screening different particle size fertilizers.

Description

Technical Field

[0001] This application relates to the technical field of fertilizer manufacturing, and in particular discloses a screening machine for fertilizer production. Background Technology

[0002] Fertilizer particle size is a key parameter affecting fertilizer dissolution rate, fertilizer release cycle, and fertilization effect. Different crops, different growth stages, and different fertilization methods all have specific requirements for fertilizer particle size. Fertilizer screening is a necessary process in fertilizer production to grade fertilizer particles, remove impurities, and ensure the uniformity of the particle size of the finished fertilizer product.

[0003] Existing fertilizer screening machines generally use a fixed-aperture screen structure. Once the screen aperture is manufactured, it cannot be adjusted, and it can only screen fertilizers of a single particle size. This results in poor equipment versatility and production adaptability. In addition, because fertilizer particles are irregularly shaped, fertilizer is easily stuck in the screen holes during the screening process, leading to screen blockage and a reduction in the screening throughput. Summary of the Invention

[0004] In order to improve the versatility of fertilizer screening machines for screening fertilizers of different particle sizes, this application provides a screening machine for fertilizer production.

[0005] This application provides a screening machine for fertilizer production, which adopts the following technical solution: A screening machine for fertilizer production includes: frame; A dust cover, which is fixedly installed on the frame; Screening components, including: A sieve cylinder is mounted on the machine frame and is housed inside the dust cover; A sieve, wherein multiple sieves are provided, and the multiple sieves can be joined together to completely cover the wall of the sieve cylinder, and the sieves have the same mesh size as the sieve cylinder; The installation components include: A hydraulic cylinder, wherein several hydraulic cylinders are provided, the number of which is the same as the number of screens, and the fixed end of the hydraulic cylinder is mounted on the dust cover. A connecting frame is fixedly connected to the movable end of the hydraulic cylinder and connected to the screen. The hydraulic cylinder can extend in length to drive the connecting frame and the screen closer to the screen cylinder and abut against the wall of the screen cylinder. A positioning element is installed on the screen cylinder. The positioning element is used to guide the movement direction of the screen mesh. Under the guidance of the positioning element, each warp wire of the screen mesh can be located between two adjacent warp wires in the screen cylinder. A fixing component is installed on the screen and is capable of detachably connecting the screen to the screen cylinder.

[0006] Optionally, it also includes a rotating assembly, the rotating assembly comprising: A rotating shaft, with both ends rotatably mounted on the frame, and the rotating shaft coaxially passing through the screen cylinder and fixedly connected to the screen cylinder; A rotating motor is fixedly mounted on the frame at its fixed end. A gearbox is fixedly mounted on the frame. The input end of the gearbox is coaxial with and fixedly connected to the output shaft of the rotating motor, and the output end of the gearbox is coaxial with and fixedly connected to the rotating shaft.

[0007] Optionally, the screen cylinder is coaxial at both ends and fixedly mounted with reinforcing plates, and the positioning component includes: A positioning block is fixedly mounted on the reinforcing plate, and a positioning hole is provided on the positioning block; A positioning rod is provided, one end of which is fixedly installed on the screen. The positioning rod can pass through the positioning hole. When the positioning rod passes through the positioning hole, the screen abuts against the screen cylinder and each warp of the screen can be located between two adjacent warp of the screen cylinder. The fixing component is used to detachably connect the positioning rod to the positioning block, thereby fixing the screen on the screen cylinder.

[0008] Optionally, the positioning element further includes: A baffle is fixedly installed in the positioning hole, dividing the positioning hole into a first positioning groove and a second positioning groove. The positioning rod can pass through the positioning hole into the first positioning groove or the second positioning groove. When the positioning rod passes through the first positioning groove, the screen abuts against the screen cylinder, and each warp wire of the screen can be located between two adjacent warp wires of the screen cylinder. When the positioning rod passes through the second positioning groove, the screen abuts against the screen cylinder, and each warp wire of the screen can be located between two adjacent warp wires of the screen cylinder, and each weft wire of the screen can be located between two adjacent weft wires of the screen cylinder. A guide member is installed inside the positioning block and is used to guide the positioning rod through the first positioning groove or the second positioning groove.

[0009] Optionally, the guide includes: A guide plate, one end of which is hinged to the baffle; A rotating component is connected to the guide plate, and the rotating component can drive the guide plate to rotate, thereby blocking the entrance of the first positioning groove or the second positioning groove.

[0010] Optionally, the fixing component includes: A limiting block, which is inserted through and slidably mounted on the side wall of the positioning hole; A limiting spring, one end of which is fixedly connected to the limiting block, and the other end of which is fixedly connected to the positioning block; A first slider is fixedly mounted on the positioning rod. The first slider can pass through the positioning hole and abut against the limiting block, so that the first slider is fixed in the positioning hole. An unlocking component is connected to the positioning rod and is used to release the limiting block from limiting the first slider.

[0011] Optionally, the first slider is shaped like a platform, the end of the limiting block away from the limiting spring is an inclined surface, and the unlocking component includes: A limiting slide groove is fixedly installed on the connecting frame, and the positioning rod passes through the limiting slide groove; The second slider is sleeved and fixedly installed on the limiting slide groove. The second slider is in the shape of a platform. The end of the first slider and the second slider that are close to each other has a larger area, and the end of the first slider and the second slider that are far from each other has a smaller area. The limiting slide groove can pass through the positioning hole and abut against the limiting block, thereby releasing the limiting block from limiting the first slider. An electromagnet is fixedly mounted on the second slider, and the electromagnet is able to attract the first slider. A connector is mounted on the limiting slide groove and is used to connect the positioning rod.

[0012] Optionally, the connector includes: The telescopic rod passes through the limiting groove, the fixed end of the telescopic rod is fixedly installed on the connecting frame, and the movable end of the telescopic rod can abut against the positioning rod. A second return spring is sleeved on the telescopic rod. One end of the second return spring is fixedly connected to the fixed end of the telescopic rod, and the other end of the second return spring is fixedly connected to the movable end of the telescopic rod.

[0013] Optionally, the installation components further include: Mounting plate, which is slidably mounted on the dust cover, is circular in shape, and the fixed end of the hydraulic cylinder is fixedly mounted on the mounting plate; A first return spring, one end of which is fixedly connected to the dust cover, and the other end of which is fixedly connected to the mounting plate. When the positioning rod passes through the second positioning groove, the length of the first return spring extends. A guide rod is fixedly installed on the dust cover and passes through the mounting plate.

[0014] Optionally, a feed hopper is fixedly installed at one end of the frame, and a first discharge hopper is fixedly installed at the other end of the frame; A second discharge hopper is fixedly installed at the bottom of the frame.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. When adjusting the size of the screen holes on the screen cylinder, the hydraulic cylinder extends and moves the screen closer to the screen cylinder. The movement of the screen moves the positioning rod and inserts it into the positioning hole. The precise alignment of the screen and the screen cylinder is achieved by the cooperation of the positioning hole and the positioning rod. This ensures that each warp wire of the screen is accurately located between two adjacent warp wires in the screen cylinder. The warp wires of the screen divide the screen holes of the screen cylinder into two effective screening holes with a size half that of the original screen holes, thereby realizing the adjustment of the screen hole size of the screen cylinder and improving the versatility of the screening components. 2. The positioning rod is guided by the guide component, so that the positioning rod can stably enter the first positioning groove or the second positioning groove according to the preset requirements. When the positioning rod enters the first positioning groove, the screen hole of the screen cylinder is divided into two effective screening holes with a size of half the original screen hole size. When the positioning rod enters the second positioning groove, the warp and weft wires of the screen mesh divide the screen hole of the screen cylinder into four effective screening holes with a size of one-quarter of the original screen hole size. This realizes the adjustment of the three sizes of the screen hole of the screen cylinder, realizes the multi-level adjustment of the screen hole diameter of the screen cylinder, and further improves the applicability of the screening component. 3. As the screen gradually approaches and abuts against the screen cylinder, the positioning rod inserts into the positioning hole, simultaneously driving the first slider into the positioning hole and towards the bottom wall of the positioning hole. During this process, the side wall of the first slider abuts against the limiting block and slides relative to it. The first slider pushes the two limiting blocks away from each other, allowing the first slider to pass through the gap between the limiting blocks and abut against the bottom wall of the positioning hole. When the first slider abuts against the bottom wall of the positioning hole, the limiting block can just abut against the end of the first slider that is close to the screen. The limiting spring drives the limiting block to reset, and the limiting block plays a limiting role for the first slider, making the first slider stably locked in the positioning hole. This allows the screen to be firmly attached to the cylinder wall of the screen cylinder, improving the structural stability of the screening assembly. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a structural diagram used to illustrate the separation state of the sieve cylinder and the sieve mesh; Figure 3 This is a schematic diagram showing the structure of a screen installed on a screen cylinder; Figure 4 This is a cross-sectional view used to show the structure of the sieve cylinder and sieve mesh; Figure 5 yes Figure 4 Enlarged view of point A; Figure 6 This is a structural cross-sectional view used to show the contact state of the first and second sliders; Figure 7 It is a structural cross-sectional view used to show the limiting block's limiting state on the first slider.

[0017] Explanation of reference numerals in the attached figures: 1. Frame; 11. Dust cover; 12. Feed hopper; 13. First discharge hopper; 14. Second discharge hopper; 2. Screening assembly; 21. Screen cylinder; 22. Screen mesh; 23. Reinforcing plate; 3. Installation components; 31. Hydraulic cylinder; 32. Connecting frame; 33. Positioning component; 331. Positioning block; 3311. Positioning hole; 33111. First positioning groove; 33112. Second positioning groove; 332. Positioning rod; 333. Baffle; 34. Guide component; 341. Guide plate; 342. Rotating component; 35. Mounting plate; 36. First return spring; 37. Guide rod; 4. Fixing component; 41. Limiting block; 42. Limiting spring; 43. First slider; 44. Unlocking component; 441. Limiting groove; 442. Second slider; 443. Electromagnet; 45. Connecting component; 451. Telescopic rod; 452. Second return spring; 5. Rotating assembly; 51. Rotating shaft; 52. Rotating motor; 53. Gearbox. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0019] This application discloses a screening machine for fertilizer production.

[0020] A screening machine for fertilizer production includes a frame 1, a screening component 2, a mounting component 3, a fixing component 4, and a rotating component 5.

[0021] A dust cover 11 is fixedly installed on the frame 1, and the screening assembly 2 is located inside the dust cover 11 to reduce the outward diffusion of dust generated during fertilizer screening. A feed hopper 12 is fixedly installed at one end of the frame 1, through which fertilizer enters the screening assembly 2 for screening. A first discharge hopper 13 is fixedly installed at the other end of the frame 1, through which fertilizer that does not meet the screening specifications is discharged. A second discharge hopper 14 is fixedly installed at the bottom of the frame 1, into which fertilizer that has passed through the screening assembly 2 falls, for the collection of fertilizer that meets the screening specifications.

[0022] The screening assembly 2 includes a screen cylinder 21 and a screen mesh 22. Both the screen cylinder 21 and the screen mesh 22 are woven from metal warp and weft threads, possessing high structural strength, good rigidity, and resistance to bending deformation. The screen mesh 22 has the same mesh count as the screen cylinder 21. The screen cylinder 21 is mounted on the frame 1 and is housed inside a dust cover 11. Multiple screen meshes 22 are provided, and these multiple screen meshes 22 can be assembled to form a complete screen cylinder that completely covers the cylinder wall of the screen cylinder 21.

[0023] Mounting assembly 3 includes hydraulic cylinders 31, connecting frame 32, and positioning element 33. Several hydraulic cylinders 31 are provided, the same number as the screen 22. The fixed end of the hydraulic cylinder 31 is mounted on the dust cover 11. The connecting frame 32 is fixedly connected to the movable end of the hydraulic cylinder 31 and is connected to the screen 22. When the hydraulic cylinder 31 extends, it can move the connecting frame 32 and the screen 22 closer to the screen cylinder 21 and abut against the wall of the screen cylinder 21. The positioning element 33 is mounted on the screen cylinder 21 and is used to guide the movement direction of the screen 22.

[0024] Under the guidance of the positioning element 33, each warp wire of the screen 22 can be located between two adjacent warp wires of the screen cylinder 21. When the screen 22 abuts against the wall of the screen cylinder 21, the warp wire of the screen 22 can divide the screen hole of the screen cylinder 21 into two, thereby adjusting the size of the screen hole of the screen cylinder 21. This enables the screening component 2 to screen fertilizers of different particle sizes and improves the versatility of the screening component 2.

[0025] As the screen 22 approaches and comes into contact with the screen cylinder 21, the warp threads of the screen 22 can push the fertilizer stuck in the screen holes of the screen cylinder 21, thereby cleaning the screen cylinder 21, avoiding the problem of the screen holes of the screen cylinder 21 being blocked and the screening throughput decreasing, and ensuring the screening efficiency of the screen cylinder 21.

[0026] The fixing component 4 is installed on the screen 22, and the fixing component 4 can detachably connect the screen 22 to the screen cylinder 21.

[0027] Furthermore, the rotating assembly 5 includes a rotating shaft 51, a rotating motor 52, and a gearbox 53. The two ends of the rotating shaft 51 are rotatably mounted on the frame 1. The rotating shaft 51 is coaxially inserted into the screen cylinder 21 and fixedly connected to the screen cylinder 21. The fixed end of the rotating motor 52 is fixedly mounted on the frame 1. The gearbox 53 is fixedly mounted on the frame 1. The input end of the gearbox 53 is coaxial with and fixedly connected to the output shaft of the rotating motor 52. The output end of the gearbox 53 is coaxial with and fixedly connected to the rotating shaft 51.

[0028] When screening fertilizer, the rotating motor 52 is started. The output shaft of the rotating motor 52 drives the rotating shaft 51 to rotate through the gearbox 53. The rotation of the rotating shaft 51 drives the screen cylinder 21 to rotate, causing the fertilizer in the screen cylinder 21 to turn over, preventing the fertilizer from accumulating in the screen cylinder 21 and improving the uniformity and efficiency of fertilizer screening.

[0029] Furthermore, the screen cylinder 21 is coaxial at both ends and fixedly mounted with reinforcing plates 23, and positioning components 33 are set on the reinforcing plates 23. The positioning components 33 include positioning blocks 331 and positioning rods 332.

[0030] The positioning block 331 is fixedly installed on the reinforcing plate 23. The positioning block 331 has a positioning hole 3311. One end of the positioning rod 332 is fixedly installed on the screen 22. The positioning rod 332 can pass through the positioning hole 3311. The length direction of the positioning hole 3311 and the length direction of the positioning rod 332 are the same as the radial direction of the screen cylinder 21, so that the positioning rod 332 can only move radially along the screen cylinder 21.

[0031] When the positioning rod 332 is inserted into the positioning hole 3311, the screen 22 abuts against the screen cylinder 21 and each warp of the screen 22 can be located between two adjacent warp of the screen cylinder 21. The fixing component 4 is used to detachably connect the positioning rod 332 and the positioning block 331, thereby fixing the screen 22 on the screen cylinder 21.

[0032] When adjusting the size of the screen holes on the screen cylinder 21, the hydraulic cylinder 31 extends in length and simultaneously drives the screen 22 closer to the screen cylinder 21. The movement of the screen 22 simultaneously drives the positioning rod 332 to move. The positioning rod 332 is inserted into the positioning hole 3311. The precise alignment of the screen 22 and the screen cylinder 21 is achieved by the cooperation of the positioning hole 3311 and the positioning rod 332, ensuring that each warp of the screen 22 can be accurately located between two adjacent warp of the screen cylinder 21.

[0033] After alignment is completed, the positioning rod 332 is connected to the positioning block 331 by the fixing component 4, so that the screen 22 is fixed on the screen cylinder 21. The screen cylinder 21 rotates and drives the screen 22 to rotate synchronously, thereby improving the structural stability of the screening component 2.

[0034] Furthermore, the positioning component 33 also includes a baffle 333 and a guide component 34. The baffle 333 is fixedly installed in the positioning hole 3311. The baffle 333 divides the positioning hole 3311 into a first positioning groove 33111 and a second positioning groove 33112 in the axial direction of the screen cylinder 21. The positioning rod 332 can pass through the positioning hole 3311 and be inserted into the first positioning groove 33111 or the second positioning groove 33112.

[0035] When the positioning rod 332 is inserted into the first positioning groove 33111, the screen 22 abuts against the screen cylinder 21 and each warp wire of the screen 22 can be located between two adjacent warp wires of the screen cylinder 21. When the positioning rod 332 is inserted into the second positioning groove 33112, the screen 22 abuts against the screen cylinder 21 and each warp wire of the screen 22 can be located between two adjacent warp wires of the screen cylinder 21 and each weft wire of the screen 22 can be located between two adjacent weft wires of the screen cylinder 21.

[0036] The guide 34 is installed in the positioning block 331. The guide 34 is used to guide the positioning rod 332 through the first positioning groove 33111 or the second positioning groove 33112.

[0037] When adjusting the size of the screen holes on the screen cylinder 21, the positioning rod 332 is guided by the guide member 34. After the hydraulic cylinder 31 inserts the positioning rod 332 into the positioning hole 3311, it ensures that the positioning rod 332 can stably enter the first positioning groove 33111 or the second positioning groove 33112 according to the preset requirements.

[0038] When the positioning rod 332 enters the first positioning groove 33111, the warp wires of the screen 22 are located between two adjacent warp wires of the screen cylinder 21. The warp wires of the screen 22 divide the screen holes of the screen cylinder 21 into two effective screening holes with a size of half that of the original screen holes.

[0039] When the positioning rod 332 enters the second positioning groove 33112, the warp wires of the screen 22 are located between two adjacent warp wires of the screen cylinder 21, and the weft wires of the screen 22 are located between two adjacent weft wires of the screen cylinder 21. The warp and weft wires of the screen 22 divide the screen holes of the screen cylinder 21 into four effective screening holes with a size of one-quarter of the original screen hole size, thereby realizing the adjustment of the screen hole size of the screen cylinder 21 and further improving the versatility of the screening component 2.

[0040] The positioning rod 332 is guided by the guide member 34 to enter the first positioning groove 33111 or the second positioning groove 33112 respectively, so as to realize the adjustment of the three sizes of the screen hole of the screen cylinder 21, realize the multi-level adjustment of the screen hole diameter of the screen cylinder 21, and further improve the applicability of the screening component 2.

[0041] Furthermore, the guide member 34 includes a guide plate 341 and a rotating member 342. One end of the guide plate 341 is hinged to the baffle 333, and the rotating member 342 is connected to the guide plate 341. The rotating member 342 can drive the guide plate 341 to rotate, and the end of the guide plate 341 away from the baffle 333 can abut against the two symmetrical sidewalls of the positioning hole 3311, thereby blocking the entrance of the first positioning groove 33111 or the second positioning groove 33112. The length of the guide plate 341 is greater than the vertical distance from the baffle 333 to the sidewall of the positioning hole 3311. When the guide plate 341 abuts against the sidewall of the positioning hole 3311, the guide plate 341 is in an inclined state within the positioning hole 3311, thereby forming a guide slope that can guide the positioning rod 332 into the first positioning groove 33111 or the second positioning groove 33112.

[0042] In this embodiment, the rotating component 342 is a rotary motor. The fixed end of the rotary motor is fixedly installed on the positioning block 331. The output shaft of the rotary motor is coaxial with and fixedly connected to the rotation shaft of the guide plate 341. The rotation of the output shaft of the rotary motor drives the guide plate 341 to rotate.

[0043] Furthermore, the fixing component 4 includes a limiting block 41, a limiting spring 42, a first slider 43, and an unlocking component 44. The limiting block 41 passes through and slides on the side wall of the positioning hole 3311. To improve the limiting stability of the limiting block 41 on the first slider 43, two limiting blocks 41 are symmetrically arranged along the axis of the positioning hole 3311. One end of the limiting spring 42 is fixedly connected to the limiting block 41, and the other end of the limiting spring 42 is fixedly connected to the positioning block 331. The limiting spring 42 always applies opposing preload forces to the two limiting blocks 41.

[0044] The first slider 43 is fixedly installed on the end of the positioning rod 332 away from the screen 22. The first slider 43 can pass through the positioning hole 3311 and abut against the limiting block 41, so that the first slider 43 is fixed in the positioning hole 3311. The distance between the limiting block 41 and the bottom wall of the positioning hole 3311 is the same as the axial height of the first slider 43. When one end face of the first slider 43 abuts against the bottom wall of the positioning hole 3311, the limiting block 41 abuts against the other end face of the first slider 43 near the screen 22. The unlocking member 44 is connected to the positioning rod 332 and is used to release the limiting block 41 from limiting the first slider 43.

[0045] As the screen 22 gradually approaches and abuts against the screen cylinder 21, the positioning rod 332 inserts into the positioning hole 3311, simultaneously driving the first slider 43 into the positioning hole 3311 and towards the bottom wall of the positioning hole 3311. During this process, the side wall of the first slider 43 abuts against and slides relative to the limiting block 41. The first slider 43 pushes the two limiting blocks 41 away from each other, allowing the first slider 43 to pass through the gap between the limiting blocks 41 and abut against the bottom wall of the positioning hole 3311. When the first slider 43 abuts against the bottom wall of the positioning hole 3311, the limiting block 41 can just abut against the end of the first slider 43 that is close to the screen 22. The limiting spring 42 drives the limiting block 41 to reset, and the limiting block 41 plays a limiting role for the first slider 43, so that the first slider 43 is stably locked in the positioning hole 3311, thereby allowing the screen 22 to be firmly attached to the cylinder wall of the screen cylinder 21, improving the structural stability of the screening assembly 2.

[0046] When it is necessary to separate the screen 22 and the screen cylinder 21, the limiting block 41 is pushed by the unlocking component 44, which compresses the length of the limiting spring 42. The contact state between the limiting block 41 and the first slider 43 is released. Under the drive of the hydraulic cylinder 31, the positioning rod 332 and the first slider 43 exit from the positioning hole 3311, realizing the rapid separation of the screen 22 and the screen cylinder 21.

[0047] Furthermore, the first slider 43 is shaped like a platform, and the end of the limiting block 41 away from the limiting spring 42 is an inclined surface.

[0048] The unlocking component 44 includes a limiting slide groove 441, a second slider 442, an electromagnet 443, and a connecting component 45. The limiting slide groove 441 is fixedly installed on the connecting frame 32. The positioning rod 332 passes through the limiting slide groove 441. The second slider 442 is sleeved and fixedly installed on the limiting slide groove 441. The second slider 442 is shaped like a platform. The end of the first slider 43 and the second slider 442 that is close to each other has a larger area, and the end of the first slider 43 and the second slider 442 that is far from each other has a smaller area. The limiting slide groove 441 can pass through the positioning hole 3311 and abut against the limiting block 41, thereby releasing the limiting block 41 from limiting the first slider 43. The electromagnet 443 is fixedly installed on the second slider 442. The first slider 43 is made of ferromagnetic material, and the electromagnet 443 can attract the first slider 43. The connecting component 45 is installed on the limiting slide groove 441 and is used to connect the positioning rod 332.

[0049] Furthermore, the connecting member 45 includes a telescopic rod 451 and a second return spring 452. The telescopic rod 451 passes through the limiting groove 441, the fixed end of the telescopic rod 451 is fixedly installed on the connecting frame 32, and the movable end of the telescopic rod 451 can abut against the positioning rod 332. The second return spring 452 is sleeved on the telescopic rod 451, one end of the second return spring 452 is fixedly connected to the fixed end of the telescopic rod 451, and the other end of the second return spring 452 is fixedly connected to the movable end of the telescopic rod 451.

[0050] As the movable end of the hydraulic cylinder 31 extends, thereby driving the screen 22 to gradually approach and abut against the screen cylinder 21, the first slider 43 and the electromagnet 443 remain in an adsorption state, the length of the second return spring 452 is compressed, and the positioning rod 332, the first slider 43 and the second slider 442 are driven into the positioning hole 3311 through the limiting slide groove 441 until the side wall of the first slider 43 abuts against the limiting block 41.

[0051] Subsequently, as the movable end of the hydraulic cylinder 31 continues to extend, after the side wall of the first slider 43 abuts against the limiting block 41, the first slider 43 pushes the two limiting blocks 41 away from each other, so that the first slider 43 can pass through the limiting block 41 and abut against the bottom wall of the positioning hole 3311. After the first slider 43 passes through the limiting block 41, the electromagnet 443 is de-energized, and the attraction state between the electromagnet 443 and the first slider 43 is released. Then the movable end of the hydraulic cylinder 31 shortens, causing the first slider 43 to separate from the second slider 442. The limiting block 41 is stuck between the first slider 43 and the second slider 442 and limits the first slider 43. The screen 22 and the screen cylinder 21 are relatively fixed.

[0052] Afterwards, the movable end of the hydraulic cylinder 31 shortens, and the limiting slide 441 and the second slider 442 move away from the first slider 43. At the same time, the second return spring 452 releases elastic potential energy. Under the action of the second return spring 452, the first slider 43 remains in contact with the bottom wall of the positioning hole 3311, so that the first slider 43 and the second slider 442 are separated. The limiting block 41 can be stuck between the first slider 43 and the second slider 442 and limit the first slider 43, thereby fixing the screen 22 and the screen cylinder 21 relatively.

[0053] Subsequently, the movable end of the hydraulic cylinder 31 continues to shorten until the limiting slide 441 and the second slider 442 can completely exit from the positioning hole 3311, so that when the screen cylinder 21 rotates, it can drive the screen 22 to rotate, while the hydraulic cylinder 31, the connecting frame 32 and the limiting slide 441 can maintain their relative positions with the dust cover 11.

[0054] When it is necessary to separate the screen 22 and the screen cylinder 21, the movable end of the hydraulic cylinder 31 extends again and drives the limiting slide 441 and the second slider 442 to insert into the positioning hole 3311. The second slider 442 pushes the limiting block 41, which compresses the length of the limiting spring 42. The contact state between the limiting block 41 and the first slider 43 is released, and the first slider 43 abuts against the second slider 442. At the same time, the electromagnet 443 is energized, and the electromagnet 443 and the first slider 43 attract each other. Under the drive of the hydraulic cylinder 31, the positioning rod 332 and the first slider 43 withdraw from the positioning hole 3311, realizing the separation of the screen 22 and the screen cylinder 21.

[0055] Furthermore, the mounting assembly 3 also includes a mounting plate 35, a first return spring 36, and a guide rod 37. A guide groove is provided on the dust cover 11. The mounting plate 35 is slidably mounted on the dust cover 11 by being installed within the guide groove. The mounting plate 35 is annular in shape. The fixed end of the hydraulic cylinder 31 is fixedly mounted on the mounting plate 35. One end of the first return spring 36 is fixedly connected to the dust cover 11, and the other end is fixedly connected to the mounting plate 35. When the positioning rod 332 passes through the second positioning groove 33112, the length of the first return spring 36 extends. When the positioning rod 332 exits from the second positioning groove 33112, the first return spring 36 returns to its original length. The first return spring 36 drives the mounting plate 35 to reset, thereby driving the hydraulic cylinder 31 to reset. The guide rod 37 is fixedly mounted on the dust cover 11 and is arranged along the length direction of the guide groove. The guide rod 37 passes through the mounting plate 35 and limits the sliding of the mounting plate 35, improving the stability of the mounting plate 35 during sliding.

[0056] The implementation principle of a screening machine for fertilizer production according to an embodiment of this application is as follows: When screening fertilizer, the rotating motor 52 drives the rotating shaft 51 to rotate, and the rotating shaft 51 drives the screen cylinder 21 to rotate, so that the fertilizer in the screen cylinder 21 is turned over and screened.

[0057] When it is necessary to adjust the fertilizer screening specifications, the installation component 3 operates, bringing the screen 22 into contact with the wall of the screen cylinder 21. During this contact, the positioning rod 332 is guided by the positioning component 33 and the guide component 34, allowing it to enter either the first positioning groove 33111 or the second positioning groove 33112. When the positioning rod 332 enters the first positioning groove 33111, the warp threads of the screen 22 divide the screen holes of the screen cylinder 21 into two effective screening holes, each half the size of the original screen holes. When the positioning rod 332 enters the second positioning groove 33112, the warp and weft threads of the screen 22 divide the screen holes of the screen cylinder 21 into four effective screening holes, each one-quarter the size of the original screen holes. This allows for adjustment of the screen hole size of the screen cylinder 21, improving the adaptability of the screening component 2 and thus enhancing the versatility of the fertilizer screening machine for screening fertilizers of different particle sizes.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screening machine for fertilizer production, characterized in that, include: Rack (1); Dust cover (11), the dust cover (11) is fixedly installed on the frame (1); The screening component (2) includes: A sieve cylinder (21) is mounted on the frame (1) and is disposed inside the dust cover (11); Screen (22), multiple screens (22) are provided, and multiple screens (22) can be combined to completely cover the wall of the screen cylinder (21). The screens (22) and the screen cylinder (21) have the same mesh number. Install component (3), including: A hydraulic cylinder (31) is provided, and the number of hydraulic cylinders (31) is the same as the number of screens (22). The fixed end of the hydraulic cylinder (31) is installed on the dust cover (11). A connecting frame (32) is fixedly connected to the movable end of the hydraulic cylinder (31). The connecting frame (32) is connected to the screen (22). The hydraulic cylinder (31) can extend in length to drive the connecting frame (32) and the screen (22) to approach the screen cylinder (21) and abut against the wall of the screen cylinder (21). Positioning element (33) is installed on the screen cylinder (21). The positioning element (33) is used to guide the movement direction of the screen (22). Under the guidance of the positioning element (33), each warp of the screen (22) can be located between two adjacent warp of the screen cylinder (21). A fixing component (4) is installed on the screen (22) and the fixing component (4) is capable of detachably connecting the screen (22) to the screen cylinder (21).

2. A screening machine for fertilizer production according to claim 1, characterized in that, It also includes a rotating assembly (5), which comprises: A rotating shaft (51) is rotatably mounted on the frame (1) at both ends. The rotating shaft (51) is coaxially inserted into the screen cylinder (21) and fixedly connected to the screen cylinder (21). Rotary motor (52), the fixed end of rotary motor (52) is fixedly installed on the frame (1); Gearbox (53), the gearbox (53) is fixedly mounted on the frame (1), the input end of the gearbox (53) is coaxial with and fixedly connected to the output shaft of the rotating motor (52), and the output end of the gearbox (53) is coaxial with and fixedly connected to the rotating shaft (51).

3. A screening machine for fertilizer production according to claim 1, characterized in that, The screen cylinder (21) is coaxial at both ends and fixedly mounted with reinforcing plates (23). The positioning component (33) includes: Positioning block (331), which is fixedly installed on the reinforcing plate (23), and positioning hole (3311) is provided on the positioning block (331). A positioning rod (332) is fixedly installed on the screen (22) at one end. The positioning rod (332) can pass through the positioning hole (3311). When the positioning rod (332) passes through the positioning hole (3311), the screen (22) abuts against the screen cylinder (21) and each warp of the screen (22) can be located between two adjacent warp of the screen cylinder (21). The fixing component (4) is used to detachably connect the positioning rod (332) and the positioning block (331) to fix the screen (22) on the screen cylinder (21).

4. A screening machine for fertilizer production according to claim 3, characterized in that, The positioning element (33) also includes: A baffle (333) is fixedly installed inside the positioning hole (3311). The baffle (333) divides the positioning hole (3311) into a first positioning groove (33111) and a second positioning groove (33112). The positioning rod (332) can pass through the positioning hole (3311) into the first positioning groove (33111) or the second positioning groove (33112). When the positioning rod (332) passes through the first positioning groove (33111), The screen (22) abuts against the screen cylinder (21), and each warp wire of the screen (22) can be located between two adjacent warp wires of the screen cylinder (21). When the positioning rod (332) is inserted into the second positioning groove (33112), the screen (22) abuts against the screen cylinder (21), and each warp wire of the screen (22) can be located between two adjacent warp wires of the screen cylinder (21), and each weft wire of the screen (22) can be located between two adjacent weft wires of the screen cylinder (21). A guide (34) is installed in the positioning block (331) and is used to guide the positioning rod (332) to pass through the first positioning groove (33111) or the second positioning groove (33112).

5. A screening machine for fertilizer production according to claim 4, characterized in that, The guide (34) includes: A guide plate (341), one end of which is hinged to the baffle (333); Rotating component (342) is connected to the guide plate (341). The rotating component (342) can drive the guide plate (341) to rotate, thereby blocking the entrance of the first positioning groove (33111) or the second positioning groove (33112).

6. A screening machine for fertilizer production according to claim 3, characterized in that, The fixing component (4) includes: A limiting block (41) is inserted through and slidably mounted on the side wall of the positioning hole (3311); A limiting spring (42) is fixedly connected at one end to the limiting block (41) and at the other end to the positioning block (331). The first slider (43) is fixedly installed on the positioning rod (332). The first slider (43) can pass through the positioning hole (3311) and abut against the limiting block (41) so that the first slider (43) is fixed in the positioning hole (3311). Unlocking component (44), which is connected to the positioning rod (332), is used to release the limiting block (41) from limiting the first slider (43).

7. A screening machine for fertilizer production according to claim 6, characterized in that, The first slider (43) is shaped like a platform, the end of the limiting block (41) away from the limiting spring (42) is an inclined surface, and the unlocking component (44) includes: A limiting slide groove (441) is fixedly installed on the connecting frame (32), and the positioning rod (332) passes through the limiting slide groove (441); The second slider (442) is sleeved and fixedly installed on the limiting groove (441). The second slider (442) is in the shape of a platform. The end of the first slider (43) and the second slider (442) that are close to each other is the end with a larger area, and the end of the first slider (43) and the second slider (442) that are far apart from each other is the end with a smaller area. The limiting groove (441) can pass through the positioning hole (3311) and abut against the limiting block (41), thereby releasing the limiting block (41) from limiting the first slider (43). An electromagnet (443) is fixedly mounted on the second slider (442), and the electromagnet (443) can attract the first slider (43); A connector (45) is installed on the limiting slide (441) and is used to connect the positioning rod (332).

8. A screening machine for fertilizer production according to claim 7, characterized in that, The connector (45) includes: Telescopic rod (451), the telescopic rod (451) is inserted into the limiting slide groove (441), the fixed end of the telescopic rod (451) is fixedly installed on the connecting frame (32), and the movable end of the telescopic rod (451) can abut against the positioning rod (332); The second return spring (452) is sleeved on the telescopic rod (451). One end of the second return spring (452) is fixedly connected to the fixed end of the telescopic rod (451), and the other end of the second return spring (452) is fixedly connected to the movable end of the telescopic rod (451).

9. A screening machine for fertilizer production according to claim 4, characterized in that, The installation component (3) also includes: Mounting plate (35), which is slidably mounted on the dust cover (11), is in the shape of a ring, and the fixed end of the hydraulic cylinder (31) is fixedly mounted on the mounting plate (35); The first return spring (36) has one end fixedly connected to the dust cover (11) and the other end fixedly connected to the mounting plate (35). When the positioning rod (332) passes through the second positioning groove (33112), the length of the first return spring (36) extends. Guide rod (37), the guide rod (37) is fixedly installed on the dust cover (11), and the guide rod (37) passes through the mounting plate (35).

10. A screening machine for fertilizer production according to claim 1, characterized in that, A feed hopper (12) is fixedly installed at one end of the frame (1), and a first discharge hopper (13) is fixedly installed at the other end of the frame (1). The bottom of the frame (1) is fixedly installed with a second discharge hopper (14).

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