Screening device

Abstract

The application provides a screening device for screening materials to be screened, which comprises a base, a clamping part rotatably arranged on the base and having a standby state and a screening state, the clamping part comprising a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being arranged in a transverse direction when the clamping part is in the standby state, the first clamping plate and the second clamping plate being arranged at an angle with the transverse direction when the clamping part is in the screening state, the first clamping plate and the second clamping plate being used for clamping the materials to be screened, the first clamping plate and the second clamping plate having a clamping position and a release position, the first clamping plate and the second clamping plate being kept at the clamping position when the clamping part is in the screening state, so that the defective materials are separated from the clamping part due to their own gravity. The technical scheme of the application can effectively solve the problem that defective potassium fertilizer particles are difficult to be screened out in the related art.

Description

Technical Field

[0001] This invention relates to the field of fertilizer manufacturing technology, and more specifically, to a screening device. Background Technology

[0002] Potash fertilizer refers to the general term for various mined and manufactured salts containing water-soluble potassium. In related technologies, potash fertilizer is generally produced as a spherical structure using a granulation device. During the production process of potash fertilizer, due to factors such as processing technology and the impurity content of raw materials, the produced potash fertilizer is a mixture including powder, dust, damaged potash fertilizer granules, and whole potash fertilizer granules. Among them, damaged potash fertilizer granules are partially incomplete and not perfectly spherical.

[0003] Uneven potassium fertilizer particles can directly affect its use by users. Generally, workers usually use screening machines to screen potassium fertilizer. Currently, the most commonly used screening machine is the vibrating screening machine. This type of screening machine can screen out powder and dust in potassium fertilizer, but it cannot screen out defective potassium fertilizer particles, which will still affect the user's subsequent use.

[0004] Therefore, there is a problem in this field of difficulty in screening out defective potassium fertilizer particles. Summary of the Invention

[0005] The main objective of this invention is to provide a screening device to solve the problem in related technologies of the difficulty in screening out defective potassium fertilizer particles.

[0006] To achieve the above objectives, the present invention provides a screening device for screening materials to be screened, wherein the materials to be screened include whole materials and damaged materials. The screening device includes: a base; a clamping part rotatably disposed on the base and having a preparatory state and a screening state. The clamping part includes a first clamping plate and a second clamping plate disposed opposite to each other. When the clamping part is in the preparatory state, the first clamping plate and the second clamping plate are disposed in the transverse direction. When the clamping part is in the screening state, the first clamping plate and the second clamping plate are disposed at an angle to the transverse direction. The first clamping plate and the second clamping plate are used to clamp the materials to be screened. The first clamping plate and the second clamping plate have clamping positions that are close to each other and releasing positions that are far apart from each other. When the first clamping plate and the second clamping plate are in the screening state, the first clamping plate and the second clamping plate remain in the clamping position so that the damaged materials are released from the clamping part due to their own gravity.

[0007] Furthermore, the clamping part also includes a rotary drive component disposed on the base and a connecting frame drivenly connected to the rotary drive component. The connecting frame includes a first connecting rod and a second connecting rod, a first clamping plate connected to the first connecting rod, and a second clamping plate connected to the second connecting rod.

[0008] Furthermore, the clamping part also includes a first clamping drive member disposed between the first connecting rod and the first clamping plate; and / or, the clamping part also includes a second clamping drive member disposed between the second connecting rod and the second clamping plate.

[0009] Furthermore, the connecting frame also includes a main body rod, with the first end of the first connecting rod and the first end of the second connecting rod connected to both ends of the main body rod. The first connecting rod and the second connecting rod are arranged in parallel, and the rotation drive is connected to the middle of the main body rod.

[0010] Furthermore, a plurality of first protruding teeth are provided on the surface of the first clamping plate facing the second clamping plate; and / or, a plurality of second protruding teeth are provided on the surface of the second clamping plate facing the first clamping plate.

[0011] Furthermore, the screening device also includes a dust removal structure disposed on the base, the dust removal structure having an air outlet facing the clamping space between the first clamping plate and the second clamping plate to ventilate the clamping space.

[0012] Furthermore, the first clamping plate has a hollow cavity, and multiple air outlets connected to the hollow cavity are provided on the surface of the first clamping plate facing the second clamping plate. The multiple air outlets form an air outlet. The dust removal structure includes a first air pump and an air passage, and the air passage connects the air outlet of the first air pump and the hollow cavity.

[0013] Furthermore, the ventilation pipeline includes a ventilation connector connected to the surface of the first clamping plate away from the second clamping plate, and a flexible pipe connecting the ventilation connector and the outlet of the first air pump. The ventilation connector is located in the middle of the first clamping plate and communicates with the hollow cavity.

[0014] Furthermore, the screening device also includes a second air pump and a collection bag mounted on the base. The second air pump has an air inlet and an air outlet. When the clamping part is in the ready state, the air inlet of the second air pump is adjacent to the first clamping plate and the second clamping plate, and the air outlet of the second air pump is connected to the collection bag.

[0015] Furthermore, the screening device also includes a holding section, which is located below the clamping section. The holding section includes a defective material holding area and a complete material holding area, with the complete material holding area located downstream of the defective material holding area in the rotation direction of the clamping section.

[0016] The present invention utilizes a clamping part rotatably mounted on a base, comprising a preparatory state and a screening state. The clamping part includes a first clamping plate and a second clamping plate disposed opposite each other, having a clamping position and a release position. In use, the operator first positions the clamping part in the preparatory state and the first and second clamping plates in the release position, then places the mixed material to be screened between the first and second clamping plates. Next, the first and second clamping plates are switched from the release position to the clamping position. At this point, the first and second clamping plates clamp the intact material, while the defective material is not clamped and can move relative to the first and second clamping plates. Then, the clamping part is switched to the screening state, and the first and second clamping plates are held in the clamping position. At this point, the defective material detaches from the clamping part due to its own gravity, thus separating the intact material and the defective material from the material to be screened. Therefore, the technical solution of this application effectively solves the problem in related technologies of the difficulty in screening out defective potassium fertilizer granules. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A front view schematic diagram of an embodiment of the sieving device according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 An enlarged schematic diagram of part of the structure of the screening device.

[0020] The above figures include the following reference numerals:

[0021] a. Direction of rotation;

[0022] 10. Base;

[0023] 20. Clamping part; 21. First clamping plate; 211. First tooth; 22. Second clamping plate; 221. Second tooth; 23. Rotation drive component; 24. Connecting frame; 241. First connecting rod; 242. Second connecting rod; 243. Main rod; 25. First clamping drive component; 26. Second clamping drive component;

[0024] 30. Dust removal structure; 31. First air pump; 32. Air duct; 321. Air vent connector; 322. Flexible pipe;

[0025] 41. Second air pump; 42. Collection bag;

[0026] 50. Storage area; 51. Area for storing damaged materials; 52. Area for storing intact materials. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] like Figure 1 , Figure 2As shown, this application provides a screening device for screening materials to be screened, wherein the materials to be screened include whole materials and damaged materials. An embodiment of the screening device of this application includes: a base 10; and a clamping part 20, rotatably disposed on the base 10 and having a ready state and a screening state. The clamping part 20 includes a first clamping plate 21 and a second clamping plate 22 disposed opposite to each other. When the clamping part 20 is in the ready state, the first clamping plate 21 and the second clamping plate 22 are arranged in the transverse direction. When the clamping part 20 is in the ready state, the first clamping plate 21 and the second clamping plate 22 are arranged in the transverse direction. When the material is in the screening state, the first clamping plate 21 and the second clamping plate 22 are set at an angle to the transverse direction. The first clamping plate 21 and the second clamping plate 22 are used to clamp the material to be screened. The first clamping plate 21 and the second clamping plate 22 have clamping positions that are close to each other and releasing positions that are far apart from each other. When the first clamping plate 21 and the second clamping plate 22 are in the screening state, the first clamping plate 21 and the second clamping plate 22 are held in the clamping position so that the defective material is released from the clamping part 20 due to its own gravity.

[0031] Using the technical solution of this embodiment, the clamping part 20 is rotatably disposed on the base 10 and has a ready state and a screening state. The clamping part 20 includes a first clamping plate 21 and a second clamping plate 22 disposed opposite to each other. The first clamping plate 21 and the second clamping plate 22 have a clamping position and a release position. In use, the operator first positions the clamping part 20 in the ready state and the first clamping plate 21 and the second clamping plate 22 in the released position, then places the mixed material to be screened between the first clamping plate 21 and the second clamping plate 22; next, the first clamping plate 21 and the second clamping plate 22 are switched from the released position to the clamping position. At this time, the first clamping plate 21 and the second clamping plate 22 will clamp the intact material, while the defective material will not be clamped and can move relative to the first clamping plate 21 and the second clamping plate 22; then, the clamping part 20 is switched to the screening state and the first clamping plate 21 and the second clamping plate 22 are kept in the clamping position. At this time, the defective material will detach from the clamping part 20 due to its own gravity, thereby separating the intact material and the defective material placed in the material to be screened. Therefore, the technical solution of this embodiment can effectively solve the problem of difficulty in screening out defective potassium fertilizer granules in related technologies.

[0032] It should be noted that the "lateral direction" mentioned above includes the horizontal direction as well as the direction that has a certain angle with the horizontal direction (for example, the direction that has an angle with the horizontal direction in the range of 0° to 5°).

[0033] like Figure 1 , Figure 2As shown, the clamping part 20 also includes a rotary drive 23 disposed on the base 10 and a connecting frame 24 drivenly connected to the rotary drive 23. The connecting frame 24 includes a first connecting rod 241 and a second connecting rod 242. A first clamping plate 21 is connected to the first connecting rod 241, and a second clamping plate 22 is connected to the second connecting rod 242. The rotary drive 23 drives the connecting frame 24 to rotate, and the connecting frame 24 drives the first clamping plate 21 and the second clamping plate 22 to rotate through the first connecting rod 241 and the second connecting rod 242, thereby realizing that the rotary drive 23 drives the first clamping plate 21 and the second clamping plate 22 to rotate simultaneously, thereby realizing the movement of the clamping part 20 between the preparatory state and the screening state. In this embodiment, the rotary drive 23 is a rotary motor.

[0034] like Figure 1 , Figure 2 As shown, the clamping part 20 further includes a first clamping drive member 25 disposed between the first connecting rod 241 and the first clamping plate 21; the clamping part 20 also includes a second clamping drive member 26 disposed between the second connecting rod 242 and the second clamping plate 22. The first clamping drive member 25 can drive the first clamping plate 21 to move toward or away from the second clamping plate 22, and the second clamping drive member 26 can drive the second clamping plate 22 to move toward or away from the first clamping plate 21, thereby realizing the movement of the first clamping plate 21 and the second clamping plate 22 between the clamping position and the release position. In other embodiments, the clamping part may only include the first clamping drive member disposed between the first connecting rod and the first clamping plate, or the clamping part may only include the second clamping drive member disposed between the second connecting rod and the second clamping plate, and the above-mentioned movement can also be realized. In this embodiment, the first clamping drive member 25 and the second clamping drive member 26 are both telescopic cylinders.

[0035] like Figure 1 , Figure 2 As shown, the connecting frame 24 also includes a main body rod 243. The first end of the first connecting rod 241 and the first end of the second connecting rod 242 are connected to both ends of the main body rod 243. The first connecting rod 241 and the second connecting rod 242 are arranged in parallel. A rotary drive member 23 is connected to the middle of the main body rod 243. The rotary drive member 23 is located in the middle of the main body rod 243, so that the middle of the main body rod 243 is driven by the rotary drive member 23, thereby making the force on the main body rod 243 more balanced and thus making the connecting frame 24 more stable.

[0036] like Figure 1 , Figure 2As shown, the surface of the first clamping plate 21 facing the second clamping plate 22 is provided with a plurality of first protrusions 211; the surface of the second clamping plate 22 facing the first clamping plate 21 is provided with a plurality of second protrusions 221. The first protrusions 211 and the second protrusions 221 are arranged in an array, and a receiving groove is formed between adjacent first protrusions 211 and between adjacent second protrusions 221 to accommodate the material to be screened, so that when the first clamping plate 21 and the second clamping plate 22 are in the clamping position, the intact material is clamped more effectively.

[0037] like Figure 1 , Figure 2 As shown, the screening device also includes a dust removal structure 30 disposed on the base 10. The dust removal structure 30 has an air outlet facing the clamping space between the first clamping plate 21 and the second clamping plate 22 to allow air to pass through the clamping space. Since the material to be screened includes not only intact and damaged materials, but also powder, dust, and other substances, the dust removal structure 30 can allow air to pass through the clamping space to blow out the powder and dust.

[0038] like Figure 1 , Figure 2 As shown, the first clamping plate 21 has a hollow cavity. Multiple air outlets connected to the hollow cavity are provided on the surface of the first clamping plate 21 facing the second clamping plate 22, forming an air outlet. The dust removal structure 30 includes a first air pump 31 and an air passage 32, which connects the air outlet of the first air pump 31 to the hollow cavity. In this embodiment, there is a gap between adjacent first protrusions 211. The air outlets are located at positions corresponding to the gaps and are connected to the hollow cavity. The first air pump 31 blows air onto the surface of the first clamping plate 21 facing the second clamping plate 22 through the air passage 32, the hollow cavity, and the air outlets. This causes powder and dust falling into the gaps to be blown away from the surface of the first clamping plate 21 facing the second clamping plate 22. This arrangement allows the air outlet to cover the entire area of ​​the surface of the first clamping plate 21 facing the second clamping plate 22, blowing out as much powder and dust as possible. In this embodiment, the second clamping plate 22 also has the same structure as the first clamping plate 21. The dust removal structure also includes a third air pump and an air guide pipe. The second clamping plate 22 and the third air pump are connected through the air guide pipe.

[0039] like Figure 1 , Figure 2As shown, the ventilation conduit 32 includes a ventilation connector 321 connected to the surface of the first clamping plate 21 away from the second clamping plate 22, and a flexible tube 322 connecting the ventilation connector 321 and the air outlet of the first air pump 31. The ventilation connector 321 is located in the middle of the first clamping plate 21 and communicates with the hollow cavity. The first clamping plate 21 will move towards or away from the second clamping plate 22. The flexible tube 322 is elastic. As the first clamping plate 21 moves towards the second clamping plate 22, the flexible tube 322 can be stretched, ensuring that the ventilation conduit 32 including the flexible tube 322 can stably blow air onto the surface of the first clamping plate 21 facing the second clamping plate 22. The ventilation connector 321 is located in the middle of the first clamping plate 21, making the air volume of the multiple air outlets more uniform.

[0040] like Figure 1 , Figure 2 As shown, the sieving device also includes a second air pump 41 and a collection bag 42 mounted on the base 10. The second air pump 41 has an air inlet and an air outlet. When the clamping part 20 is in the ready state, the air inlet of the second air pump 41 is adjacent to the first clamping plate 21 and the second clamping plate 22, and the air outlet of the second air pump 41 is connected to the collection bag 42. The dust removal structure can blow up powder and dust. The air inlet of the second air pump 41 is close to the first clamping plate 21 and the second clamping plate 22, and the air outlet of the second air pump 41 is connected to the collection bag 42, so that when the second air pump 41 is working, the powder and dust will be sucked into the collection bag 42 and collected. The collection bag 42 has a mesh structure.

[0041] In this embodiment, the operator first sets the clamping part 20 to the ready state and sets the first clamping plate 21 and the second clamping plate 22 to the release position, and places the material to be screened on the first clamping plate 21; then the first air pump 31, the third air pump and the second air pump 41 are turned on so that the powder and dust in the material to be screened are blown into the collection bag 42; then the first clamping plate 21 and the second clamping plate 22 are switched from the release position to the clamping position, and then the clamping part 20 is switched from the ready state to the screening state. The damaged material is detached from the clamping part 20 due to its own gravity and is screened out; finally, the intact material is detached from the clamping part 20.

[0042] like Figure 1 , Figure 2 As shown, the screening device also includes a holding section 50, which is located below the clamping section 20. The holding section 50 includes a damaged material holding area 51 and a intact material holding area 52. The intact material holding area 52 is located downstream of the damaged material holding area 51 in the rotation direction a of the clamping section 20. Figure 1 , Figure 2 Taking the rotation direction 'a' shown as an example, the rotation direction 'a' is... Figure 2In a counter-clockwise direction, the holding part 50 is located below the clamping part 20, and the defective material holding area 51 is located to the left of the intact material holding area 52. The clamping part 20 rotates counter-clockwise. The clamping part 20 will first rotate to the position corresponding to the defective material holding area 51. The first clamping plate 21 and the second clamping plate 22 remain in the clamping position. The defective material will be released from the clamping part 20 and fall into the defective material holding area 51. Then the clamping part 20 rotates to the position corresponding to the intact material holding area 52. The first clamping plate 21 and the second clamping plate 22 switch to the release state, and the intact material falls into the intact material holding area 52, thereby completing the screening of the material to be screened.

[0043] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0044] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A screening device for screening materials to be screened, wherein, The material to be screened includes intact material and damaged material, characterized in that the screening device includes: Base (10); A clamping part (20) is rotatably disposed on the base (10) and has a preparatory state and a screening state. The clamping part (20) includes a first clamping plate (21) and a second clamping plate (22) disposed opposite to each other. When the clamping part (20) is in the preparatory state, the first clamping plate (21) and the second clamping plate (22) are disposed in the transverse direction. When the clamping part (20) is in the screening state, the first clamping plate (21) and the second clamping plate (22) are disposed at an angle to the transverse direction. The first clamping plate (21) and the second clamping plate (22) are used to clamp the material to be screened. The first clamping plate (21) and the second clamping plate (22) have clamping positions that are close to each other and releasing positions that are far apart from each other. When the first clamping plate (21) and the second clamping plate (22) are in the screening state, the first clamping plate (21) and the second clamping plate (22) are held in the clamping position so that the defective material is released from the clamping part (20) due to its own weight. The clamping part (20) further includes a rotary drive (23) disposed on the base (10) and a connecting frame (24) drivenly connected to the rotary drive (23). The connecting frame (24) includes a first connecting rod (241) and a second connecting rod (242). The first clamping plate (21) is connected to the first connecting rod (241), and the second clamping plate (22) is connected to the second connecting rod (242).

2. The screening device according to claim 1, characterized in that, The clamping part (20) further includes a first clamping drive member (25) disposed between the first connecting rod (241) and the first clamping plate (21); and / or, The clamping part (20) further includes a second clamping drive (26) disposed between the second connecting rod (242) and the second clamping plate (22).

3. The screening device according to claim 1, characterized in that, The connecting frame (24) also includes a main body rod (243), the first end of the first connecting rod (241) and the first end of the second connecting rod (242) are connected to the two ends of the main body rod (243), the first connecting rod (241) and the second connecting rod (242) are arranged in parallel, and the rotation drive (23) is connected to the middle of the main body rod (243).

4. The screening device according to claim 2, characterized in that, The first clamping plate (21) has a plurality of first protruding teeth (211) on its surface facing the second clamping plate (22); and / or, The second clamping plate (22) has a plurality of second protrusions (221) on its surface facing the first clamping plate (21).

5. The screening device according to any one of claims 1 to 4, characterized in that, The sieving device further includes a dust removal structure (30) disposed on the base (10), the dust removal structure (30) having an air outlet facing the clamping space between the first clamping plate (21) and the second clamping plate (22) to ventilate the clamping space.

6. The screening device according to claim 5, characterized in that, The first clamping plate (21) has a hollow cavity. The surface of the first clamping plate (21) facing the second clamping plate (22) is provided with a plurality of air outlets that communicate with the hollow cavity. The plurality of air outlets form the air outlet. The dust removal structure (30) includes a first air pump (31) and an air passage (32). The air passage (32) communicates with the air outlet of the first air pump (31) and the hollow cavity.

7. The screening device according to claim 6, characterized in that, The ventilation pipe (32) includes a ventilation connector (321) connected to the surface of the first clamping plate (21) away from the second clamping plate (22) and a flexible pipe (322) connecting the ventilation connector (321) and the air outlet of the first air pump (31). The ventilation connector (321) is located in the middle of the first clamping plate (21) and communicates with the hollow cavity.

8. The screening device according to any one of claims 1 to 4, characterized in that, The sieving device further includes a second air pump (41) and a collection bag (42) disposed on the base (10). The second air pump (41) has an air inlet and an air outlet. When the clamping part (20) is in the preparatory state, the air inlet of the second air pump (41) is disposed adjacent to the first clamping plate (21) and the second clamping plate (22), and the air outlet of the second air pump (41) is connected to the collection bag (42).

9. The screening device according to any one of claims 1 to 4, characterized in that, The screening device further includes a holding section (50), which is located below the clamping section (20). The holding section (50) includes a defective material holding area (51) and a complete material holding area (52). The complete material holding area (52) is located downstream of the defective material holding area (51) in the rotation direction (a) of the clamping section (20).

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