Chemical fertilizer screening device with adjustable meshes

Abstract

The utility model provides a chemical fertilizer screening device with adjustable meshes, which comprises a closed frame, a plurality of groups of mutually perpendicular support strips are arranged in the frame, meshes are formed among the support strips, four spacing pieces are arranged around the inner edge of each mesh, the support strips are hollow, and the spacing pieces are arranged in the frame. The side faces of the supporting strips are provided with open grooves penetrating out of the supporting strips, the spacing pieces are rotationally arranged in the supporting strips, transmission assemblies are further arranged in the supporting strips, and the spacing pieces are matched with the transmission assemblies to conduct sector displacement in the open grooves so as to adjust the hole diameters of the meshes. The control assembly controls movement of the spacing pieces through the transmission assembly, through the mechanisms, the screening device capable of adjusting the size of the meshes is achieved, the labor cost is saved, and the screening efficiency of the chemical fertilizer is improved.

Description

Technical Field

[0001] This utility model relates to the field of fertilizer screening, and in particular to a fertilizer screening device with adjustable mesh size. Background Art

[0002] Modern agriculture has always had a high demand for chemical fertilizers. Different fertilizers are used for the growth of different crops. Among these, the size of the fertilizer particles affects the rate at which crops absorb nutrients. Generally speaking, larger fertilizer particles decompose more slowly in the soil, resulting in a slower fertilizer effect. Therefore, it takes a longer time for crops to absorb them, making them suitable for crops that do not require high fertility but need continuous topdressing during their growth period. During the seedling, flowering, and fruiting stages, smaller fertilizer particles that decompose quickly and release nutrients rapidly are needed.

[0003] In existing technologies, fertilizers are mostly granulated and rounded using granulators. However, the finished fertilizer granules from granulators are often uneven in size and volume, requiring screening devices to separate fertilizer granules of different sizes and uniformity. Existing screening devices mostly use sieves, but one type of sieve cannot completely separate fertilizer granules of different sizes. Several sieves of different specifications are needed to screen the fertilizer granules step by step to meet the needs of different customers. However, whether using a fine-mesh sieve to screen small granules or a coarse-mesh sieve to screen large granules, the remaining fertilizer needs to be sent to sieves of other specifications for further screening. This screening method is too inefficient, increases labor costs, and reduces production efficiency. Therefore, there is a need to provide a fertilizer granule screening device that solves the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a fertilizer screening device with adjustable mesh size, which solves the problem that the existing fertilizer granule screening requires the use of multiple screens of different specifications, resulting in low screening efficiency, increased labor costs, and reduced production efficiency.

[0005] An adjustable-mesh fertilizer screening device includes a closed frame with several sets of mutually perpendicular support bars inside the frame. Mesh holes are formed between the support bars. Four spacers are arranged around the inner edge of each mesh hole. The support bars are hollow inside and have slots extending to the outside of the support bars on their sides. The spacers are rotatably disposed inside the support bars. A transmission component is also provided inside the support bars. The spacers, in conjunction with the transmission component, can perform fan-shaped displacement within the slots, thereby adjusting the mesh hole diameter. A control component is provided inside the frame, which controls the movement of the spacers through the transmission component.

[0006] Furthermore, the transmission assembly includes a connecting block disposed inside the support bar. A rotating shaft is coaxially disposed at the center of the connecting block. Both ends of the rotating shaft are rotatably connected inside the support bar. A torsion spring is wound around one end of the connecting block. One end of the torsion spring is fixed to the side of the spacer near the connecting block, and the other end is fixed to the side wall of the connecting block. A pull wire is wound around the other end of the connecting block. The pull wire is parallel to the spacer, and the end of the pull wire is fixedly connected to the control assembly. The control assembly controls the rotation of the connecting block through the pull wire, thereby controlling the deformation of the torsion spring. The spacer achieves a fan-shaped displacement towards the support bar through the deformation of the torsion spring.

[0007] Furthermore, one end of the pull wire around the top of the connecting block extends toward the adjacent connecting block and is connected to the adjacent connecting block. Multiple connecting blocks on a straight line are linked and controlled by the pull wire.

[0008] Furthermore, the support strip at the edge of the mesh is provided with two spacers with opposite displacement directions. The two spacers are respectively set in adjacent meshes. The transmission assembly controls the movement of the two spacers simultaneously. The connecting block is provided with two torsion springs. The two torsion springs control the two spacers respectively. The spacers are provided with cavities inside. The outwardly extending ends of the torsion springs extend toward the cavity of the spacers and are fixedly connected to the inside of the cavity.

[0009] Furthermore, the control component includes a control rod arranged around the inside of the frame, with a bevel gear fixed to the end of the control rod. The control rods are interconnected via the bevel gear, and the pull cable is connected to the rod body of the control rod.

[0010] Furthermore, a disc is provided at one corner of the frame, and the disc is coaxially connected to the control lever.

[0011] The technical principle of this utility model is as follows:

[0012] This invention adds spacers to the mesh openings of existing screens. These spacers, working in conjunction with other spacers, expand or shrink the mesh opening area through their fan-shaped displacement. Simultaneously, placing the spacers inside the support bars reduces their bulk. The control component, driven by the transmission component, allows the spacers to move fan-shaped within their slots. When the connecting block of the transmission component is not rotating, the torsion spring is relaxed, and the spacers are in an expanded state with the mesh openings at their smallest size. When the connecting block is rotated by a pull wire, the torsion spring is compressed, and the spacers slowly move away from the center of the mesh openings, causing the mesh openings to enlarge. The compressed torsion spring ensures that the spacers themselves do not sway excessively, affecting the mesh opening area. This mechanism allows for control of the mesh opening size, enabling the grading and screening of the same batch of materials without replacing the screen. It solves the problems of low efficiency with fixed-mesh screens and the need for multiple screening devices, which increases labor costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the normal appearance of an embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram of the enlarged mesh size of this utility model.

[0015] Figure 3 This is a partial detailed structural diagram of the present invention.

[0016] Figure 4 for Figure 3 Enlarged view of point A

[0017] Figure 5 This is a schematic diagram of the spacer of this utility model.

[0018] Figure 6 This is a schematic diagram of the transmission component of this utility model.

[0019] Figure 7 This is a side view of the present invention.

[0020] In the above attached figures:

[0021] 1. Frame; 11. Control lever; 12. Bevel gear; 13. Disc;

[0022] 2. Support strip;

[0023] 3. Mesh;

[0024] 4. Transmission assembly; 41. Pull cable; 42. Connecting block; 43. Torsion spring; 44. Rotating shaft;

[0025] 5. Spacer; 51. Cavity. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 7 The fertilizer screening device with adjustable mesh size shown includes a closed frame 1. Inside the frame 1 are several sets of mutually perpendicular support bars 2, forming mesh openings 3 between the support bars 2. Four spacers 5 are arranged around the inner edge of each mesh opening 3. The support bars 2 are hollow inside, with slots extending through to the outside of the support bars 2 on their sides. The spacers 5 are rotatably disposed within the support bars 2. A transmission component 4 is also provided inside the support bars 2. The spacers 5, in conjunction with the transmission component 4, can perform fan-shaped displacement within the slots, thereby adjusting the mesh opening diameter 3. A control component is provided inside the frame 1, which controls the movement of the spacers 5 via the transmission component 4. Through this mechanism, by adding several spacers 5 to a standard screen with a fixed mesh opening area 3, the size of the mesh opening 3 can be controlled, enabling multiple screening specifications from a single screen.

[0028] Furthermore, such as Figures 3 to 7 As shown, the transmission assembly 4 includes a connecting block 42 disposed inside the support bar 2. A rotating shaft 44 is coaxially disposed at the center of the connecting block 42. Both ends of the rotating shaft 44 are rotatably connected to the support bar 2. A torsion spring 43 is wound around one end of the connecting block 42. One end of the torsion spring 43 is fixed to the side of the spacer 5 near the connecting block 42, and the other end is fixed to the side wall of the connecting block 42. A pull wire 41 is wound around the other end of the connecting block 42. The pull wire 41 is parallel to the spacer 5, and the end of the pull wire 41 is fixedly connected to the control assembly. The control assembly controls the rotation of the connecting block 42 via the pull wire 41, thereby controlling the connection. The torsion spring 43 deforms, and the spacer 5 moves in a fan-shaped displacement towards the support bar through the deformation of the torsion spring 43. Through the above mechanism, the pull wire 41 controls the rotation of the connecting block 42, thereby controlling the expansion and contraction of the spacer 5. When the connecting block 42 is not rotating, the torsion spring 43 is in a relaxed state, and the spacer 5 is in an expanded state. When the pull wire 41 pulls the connecting block 42 to rotate, the torsion spring 43 is slowly compressed, and the spacer 5 slowly moves away from the center of the mesh 3 in a fan-shaped displacement. At this time, the mesh 3 begins to expand, and the compressed torsion spring 43 ensures that the spacer 5 itself will not shake significantly, affecting the passage area of ​​the mesh 3, thus achieving stable control of the mesh 3 aperture size.

[0029] Furthermore, such as Figure 3 and Figure 6 as well as Figure 7As shown, one end of the pull wire 41 that surrounds the top of the connecting block 42 extends toward the adjacent connecting block 42 and is connected to the adjacent connecting block 42. Multiple connecting blocks 42 in a straight line are linked and controlled by the pull wire 41. Through the above mechanism, the pull wire 41 surrounds all connecting blocks 42, and the pull wire 41 extends from one side of the connecting block 42 toward the two adjacent connecting blocks 42. Thus, pulling one connecting block 42 to rotate can simultaneously drive the subsequent connecting blocks 42 to rotate.

[0030] Furthermore, such as Figures 1 to 3 and Figures 5 to 7 As shown, the support strip 2 at the edge of the mesh 3 is provided with two spacers 5 with opposite displacement directions. The two spacers 5 are respectively set in adjacent meshes 3. The transmission component 4 controls the movement of the two spacers 5 simultaneously. The connecting block 42 is provided with two torsion springs 43. The two torsion springs 43 control the two spacers 5 respectively. The spacers 5 have cavities inside. The outwardly extending ends of the torsion springs 43 extend toward the cavity of the spacers 5 and are fixedly connected to the inside of the cavity. Through the above mechanism, by setting two unconnected torsion springs 43, a pull wire 41 can control all the spacers 5 on both sides of a support strip 2.

[0031] Furthermore, such as Figures 1 to 4 as well as Figure 6 , Figure 7 As shown, the control assembly includes a control rod 11 surrounding the inside of the frame 1. A bevel gear 12 is fixed to the end of the control rod 11. The control rods 11 are interconnected through the bevel gear 12. A pull wire 41 is connected to the control rod 11 and is vertically fixed to the rod body of the control rod 11. A control disc 13 is also provided at one corner of the frame 1. The control disc 13 is coaxially connected to the control rod 11. Through the above mechanism, the pull wire 41 is wrapped around the control rod 11. Rotating the control rod 11 can pull the pull wire 41. At the same time, two control rods 11 can be linked together through the bevel gear 12. The rotation of only one control rod 11 can be controlled to control the movement of all control rods 11. Using the disc 13 makes it more convenient and less labor-intensive to operate the rotation of the control rods 11.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fertilizer screening device with adjustable mesh, characterized in that: It includes a closed frame, wherein a plurality of mutually perpendicular support bars are arranged inside the frame, a mesh is formed between the support bars, four spacers are arranged around the inner edge of the mesh, the support bar is hollow inside, and a slot is arranged on the side that passes through to the outside of the support bar, the spacer is rotatably arranged in the support bar, and a transmission component is also arranged inside the support bar. The spacer cooperates with the transmission component to perform fan-shaped displacement in the slot, so as to adjust the mesh aperture, and a control component is arranged in the frame, and the control component controls the movement of the spacer through the transmission component.

2. A fertilizer screening device with adjustable mesh according to claim 1, characterized in that: The transmission assembly includes a connecting block arranged inside the support bar, and a rotating shaft is coaxially arranged at the center position of the connecting block. Both ends of the rotating shaft are rotatably connected in the support bar. A torsion spring is arranged around one end of the connecting block, one end of the torsion spring extends outward and is fixedly connected to a side of the spacer close to the connecting block, and the other end is fixed to the side wall of the connecting block. A pull wire is also arranged around the other end of the connecting block, and the pull wire is parallel to the spacer. The end of the pull wire is fixedly connected to the control assembly. The control assembly controls the rotation of the connecting block through the pull wire and then controls the deformation of the torsion spring. The spacer realizes a fan-shaped displacement in the direction of the support bar through the deformation of the torsion spring.

3. A fertilizer screening device with adjustable mesh according to claim 2, characterized in that: One end of the pull wire surrounding the top of the connection block extends toward the connection block at the adjacent position and surrounds and connects to the connection block at the adjacent position. Multiple connection blocks on the straight line are controlled in linkage through the pull wire.

4. A fertilizer screening device with adjustable mesh according to claim 3, characterized in that: Two spacers with opposite displacement directions are provided on the support bar at the edge of the mesh, and the two spacers are respectively arranged in adjacent meshes. The transmission component simultaneously controls the movement of the two spacers, and two torsion springs are provided on the connecting block, and the two torsion springs respectively control the two spacers. A cavity is provided inside the spacer, and the outwardly extending end of the torsion spring extends toward the cavity of the spacer and is fixedly connected to the inner side of the cavity.

5. The fertilizer screening device with adjustable mesh according to claim 2, characterized in that: The control assembly comprises a control rod which is arranged around the frame, the end of the control rod is fixedly connected with a bevel gear, the control rods are connected to each other through the bevel gear, and the pull wire is connected to the rod body of the control rod.

6. A fertilizer screening device with adjustable mesh according to claim 5, characterized in that: A disc is also provided at one corner of the frame, and the disc is coaxially connected to the control rod.

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