Screening device capable of being used for compound fertilizer particles

Abstract

The screening device capable of being used for the compound fertilizer particles comprises a support, a second screening mechanism and a third screening mechanism are arranged on the support, the second screening mechanism is located above the third screening mechanism, and the hole diameter of the second screening mechanism is larger than that of the third screening mechanism. The second screening mechanism and the third screening mechanism are arranged in an adjustable mode, and a second discharging bin and a first discharging bin are arranged on the side edges of the second screening mechanism and the third screening mechanism correspondingly. The second screening mechanism and the third screening mechanism are arranged, and the hole diameter of the second screening holes is larger than that of the third screening mechanism, so that after fertilizer is poured on the second screening mechanism, large-particle fertilizer is intercepted, and the fertilizer meeting the size is discharged to the third screening mechanism; and the powder mixed in the fertilizer passes through the third screening mechanism and falls down.

Description

Technical Field

[0001] The utility model relates to the field of particle screening, in particular to a screening device that can be used for compound fertilizer particles. Background Technique

[0002] When producing compound fertilizers, it is necessary to go through steps such as raw material preparation, batching and mixing, granulation, drying, cooling, screening, and packaging. Drying and cooling are to make the granular fertilizers take shape and have a certain hardness. By screening, too large and too small particles can be removed to ensure the uniform particle size of the product.

[0003] At present, there are many devices for fertilizer screening. For example, a particle size screening device for compound fertilizer particles disclosed in a Chinese patent with the publication number CN112024393A has a first inverted T-shaped support and a second inverted T-shaped support arranged on a support platform. Uniform speed motors are respectively fixed on the first inverted T-shaped support and the second inverted T-shaped support. The output ends of the uniform speed motors are hinged with a first hinge seat through a transmission shaft, an eccentric shaft, and a transmission arm. Limit support plates are respectively fixed on the first inverted T-shaped support and the second inverted T-shaped support. A first hydraulic cylinder is installed on the limit support plate. The non-extending end of the first hydraulic cylinder is fixedly connected with the first hinge seat. The end of the telescopic rod of the first hydraulic cylinder is hinged with a second hinge seat through a hinged vertical block. A limit mounting plate is fixed on the second hinge seat. A limit screen frame is fixed between the limit mounting plates. One end of the limit screen frame is fixed with an inclined screening plate groove. An automatically adjustable material blocking side plate is arranged on the limit screen frame. Another example is a drum screen disclosed in a Chinese patent with the publication number CN115069531B, which includes a frame, an outer screen cylinder, and a driving member. The outer screen cylinder is supported by the frame. An inner screen cylinder is coaxially arranged in the outer screen cylinder, and the inner circumferential surface of the outer screen cylinder is in contact with the outer circumferential surface of the inner screen cylinder. The driving member is supported by the frame and is used to drive the outer screen cylinder to rotate axially. A detachable rotation limiting component is arranged between the outer screen cylinder and the inner screen cylinder to limit the relative rotation between the two. An axially limiting component that is detachable is arranged between the outer screen cylinder and the inner screen cylinder to limit the relative translational movement between the two along the axial direction.

[0004] When using the screening device provided by the first patent above, larger-sized particles remain on the screening mesh plate, and the remaining particles fall through the screening mesh plate. When using the drum screen provided by the second patent, although it is provided with two inner and outer screen cylinders, the two screen cylinders are arranged in contact, and it also retains larger-sized particles in the screening cylinder. This results in the mixing and packaging of fertilizer particles that meet the particle size with smaller-sized particles, that is, the full screening of fertilizer particles cannot be achieved, and the too small particles may easily agglomerate during transportation and storage, affecting the use effect. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a screening device that can be used for compound fertilizer particles, aiming to improve the problem that the existing devices for screening fertilizer particles cannot screen fertilizers with qualified particle sizes and smaller particle sizes.

[0006] The present utility model is implemented as follows: A screening device that can be used for compound fertilizer particles includes a support frame, on which a second screening mechanism and a third screening mechanism are arranged. The second screening mechanism is located above the third screening mechanism, and the aperture is larger than that of the third screening mechanism; both the second screening mechanism and the third screening mechanism are adjustable, and a second feeding bin and a first feeding bin are respectively arranged on their sides.

[0007] Preferably, the second screening mechanism includes a second screen, a second support frame, and a pushing frame. The second support frame is arranged in a U-shaped structure with an upward opening. The second screen is installed at the bottom of the second support frame. The pushing frame is arranged above the second screen and can move relative to the second support frame. At the same time, the bottom surface of the pushing frame is in sliding contact with the inner bottom surface of the second support frame and the upper side surface of the second screen.

[0008] Preferably, a snap plate is fixedly arranged on the inner side wall of the second support frame, and a snap groove is arranged on the side wall of the pushing frame. The snap plate is located in the snap groove; a clamping groove is arranged on the outer side surface of the second support frame, and a clamping plate is fixedly arranged on the support frame. The clamping plate is installed in the clamping groove through a bolt connection.

[0009] Preferably, the third screening mechanism has the same composition as the second screening mechanism. A driving mechanism is arranged on the side of the third screening mechanism and the second screening mechanism. The driving mechanism is arranged deviating from the second feeding bin and the first feeding bin.

[0010] Preferably, the driving mechanism includes a driving rope, a motor, a plurality of first support wheels, and a second support wheel. The driving rope is arranged in a straight and circular structure and has a U-shaped shape. The first support wheel and the second support wheel are respectively arranged horizontally and vertically and are respectively arranged at the end corners of the driving rope and are connected to the support frame at the same time. The output shaft of the motor is connected to the central axis of the second support wheel.

[0011] Preferably, lower clamping plates are fixedly arranged at the end corners above the pushing frame. An upper clamping plate is arranged above the lower clamping plates through a bolt connection. The driving rope passes through the space formed by the upper clamping plate and the lower clamping plates; the lower clamping plates of the third screening mechanism and the second screening mechanism are located at different end corners.

[0012] Preferably, the motor is installed on a connecting plate, and a limiting wheel is also arranged on the side. The limiting wheel presses against the driving rope in contact with the second support wheel. The central axis of the limiting wheel passes through a vertical plate. An insertion plate is fixedly arranged at the bottom of the vertical plate, and an adjusting screw is connected to the side. The insertion plate passes through the connecting plate, and the adjusting screw is threadedly connected through the connecting plate. The connecting plate is fixedly connected to the support frame.

[0013] Preferably, a first screening mechanism is further provided on the support. The first screening mechanism is located below the third screening mechanism, and its aperture is less than or equal to that of the third screening mechanism. The first screening mechanism includes a first support frame and a first screen. The first screen is installed on the first support frame. A clamping groove is provided on the outer side of the first support frame, and the clamping plate of the support is installed in the clamping groove through a bolt connection.

[0014] Preferably, there are two first feeding bins and two second feeding bins. The two same-type feeding bins are respectively arranged on the side edges of the open end of the second support frame, and the top surface is lower than the bottom surface of the pushing frame.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model is provided with a second screening mechanism and a third screening mechanism, and the aperture of the second screening holes is larger than that of the third screening mechanism. Therefore, after the fertilizer is poured on the second screening mechanism, the large-particle fertilizers are intercepted, the fertilizers meeting the size requirements are fed onto the third screening mechanism, and the powder mixed in the fertilizers passes through the third screening mechanism and falls.

[0017] 2. The present utility model is provided with a pushing frame, and the pushing frame can reciprocate in the forward and reverse directions on the screen, which can push the fertilizer particles on the screen to move, accelerate the screening of the fertilizer particles, and can control the intercepted fertilizer particles to be output from the end of the screening mechanism and move down along the feeding bin to realize fertilizer collection.

[0018] 3. The present utility model is provided with a driving rope, and the driving rope is respectively connected to different end corners of the two pushing frames. Therefore, when the driving rope rotates, the two pushing frames move in opposite directions, and then push the fertilizer particles on the second screening mechanism and the third screening mechanism to be output from different ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the first overall structural schematic diagram of the present utility model;

[0020] Figure 2 is the second overall structural schematic diagram of the present utility model;

[0021] Figure 3 is the third overall structural schematic diagram of the present utility model;

[0022] Figure 4 is the structural schematic diagram of the support of the present utility model;

[0023] Figure 5 is the structural schematic diagram of the first screening mechanism of the present utility model;

[0024] Figure 6 is the structural schematic diagram of the second feeding bin of the present utility model;

[0025] Figure 7 It is a schematic structural diagram of the driving mechanism, the second screening mechanism, and the third screening mechanism of the present utility model;

[0026] Figure 8 It is a schematic structural diagram of the second screening mechanism of the present utility model;

[0027] Figure 9 It is a schematic structural diagram of the driving mechanism of the present utility model;

[0028] Figure 10 It is a schematic structural diagram of the motor of the present utility model;

[0029] Figure 11 It is a schematic structural diagram of the connecting plate of the present utility model;

[0030] Figure 12 It is a partial schematic structural diagram of the pushing frame of the present utility model.

[0031] In the figure: 1. Bracket; 11. Control box; 12. Clamping plate; 13. Connecting plate; 2. First screening mechanism; 21. First support frame; 22. First screen; 23. Card slot; 3. Driving mechanism; 31. Driving rope; 32. First support wheel; 33. Second support wheel; 34. Motor; 35. Connecting plate; 36. Limiting wheel; 37. Vertical plate; 38. Adjusting screw; 39. Inserting plate; 4. Second screening mechanism; 41. Second screen; 42. Pushing frame; 43. Snap groove; 44. Snap plate; 45. Second support frame; 46. Lower clamping plate; 47. Upper clamping plate; 5. First feeding bin; 6. Second feeding bin; 7. Third screening mechanism. Specific embodiments

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The following is a further description in conjunction with the drawings and specific embodiments:

[0034] Embodiment 1

[0035] In order to effectively remove the too large and too small particles in the fertilizer particles, this embodiment provides a multi-stage screening device for fertilizer particles, which can screen out the smaller particles after screening out the too large fertilizer particles. The specific technical solution is as follows.

[0036] As Figures 1 - 3 shown, the screening device includes a bracket 1, a second screening mechanism 4 and a third screening mechanism 7. The bracket 1 is arranged in a frame structure. The second screening mechanism 4 is arranged on the top of the bracket 1, and the third screening mechanism 7 is arranged in the middle of the bracket 1. The aperture of the third screening mechanism 7 is smaller than that of the second screening mechanism 4, and the aperture of the second screening mechanism 4 should be slightly larger than the diameter of the fertilizer particles that meet the requirements. When screening the fertilizer particles is required, the fertilizer particles are poured onto the second screening mechanism 4. The particles smaller than its aperture pass through the pores and fall into the third screening mechanism 7. The fertilizer particles located in the third screening mechanism 7 are the particles that meet the requirements. The smaller-sized particles pass through the third screening mechanism 7 and fall. Through this operation, the removal of oversized and undersized fertilizer particles can be achieved, changing the current situation that the existing screening device can only screen out oversized fertilizer particles. A control box 11 is arranged on the bracket 1, and the control box 11 is electrically connected to the motor 34.

[0037] As Figure 8 shown, in order to accelerate the rate of fertilizer particles passing through the screening mechanism, the second screening mechanism 4 includes a second screen 41, a second support frame 45 and a pushing frame 42. The second support frame 45 is arranged in a U-shaped structure with an upward opening, and the front and rear ends are also arranged with openings. A snap plate 44 is fixedly arranged on the inner side wall of the second support frame 45. The snap plate 44 is arranged along the front and rear directions of the second support frame 45. The second screen 41 is installed at the bottom of the second support frame 45, and the upper side is flush with the inner bottom surface of the second support frame 45. The pushing frame 42 is arranged above the second screen 41. A snap groove 43 is arranged on the side wall of the pushing frame 42, and the snap plate 44 is located in the snap groove 43. The bottom surface of the pushing frame 42 is flush with the upper side of the second screen 41. Therefore, the pushing frame 42 can move relative to the second support frame 45 to push the fertilizer particles located above the second screen 41 to move, so that the particles smaller than the aperture of the second screen 41 fall, and the particles that do not meet the size can be pushed to move along the second support frame 45 and finally output from the screening mechanism, avoiding the accumulation of fertilizer particles and affecting the screening of subsequent fertilizer particles.

[0038] As Figure 8 shown, in order to stably install the second screening mechanism 4 relative to the bracket 1, a card slot 23 is arranged on the outer side surface of the second support frame 45, and a clamping plate 12 is fixedly arranged on the bracket 1. The clamping plate 12 is installed in the card slot 23 through bolts. Therefore, with the cooperation of the clamping plate 12 and the card slot 23, the second support frame 45 is stably installed relative to the bracket 1, that is, the second screening mechanism 4 is stably installed relative to the bracket 1, and at the same time, it provides convenience for disassembling the second screening mechanism 4 according to requirements.

[0039] As Figure 7As shown, in addition, the composition of the third screening mechanism 7 is the same as that of the second screening mechanism 4, that is, it also includes a second screen 41, a second support frame 45 and a push frame 42. In addition, the push frames 42 of the second screening mechanism 4 and the third screening mechanism 7 move in opposite directions, thereby pushing the fertilizer particles located above the third screening mechanism 7 and the second screening mechanism 4 to be output from different ends.

[0040] like Figure 7 、 Figure 9 、 Figure 12 As shown, in order to control the output of fertilizer from different ends, a drive mechanism 3 is installed on the side of the third screening mechanism 7 and the second screening mechanism 4. The drive mechanism 3 includes a driving rope 31, a motor 34, a plurality of first support wheels 32 and a second support wheel 33. The driving rope 31 is configured as a straightened ring structure and is in the shape of a 匸. The first support wheels 32 and the second support wheels 33 are respectively mounted horizontally and vertically on the side of the bracket 1 and are respectively arranged at the end corners of the driving rope 31. Therefore, under the cooperation of the first support wheels 32 and the second support wheels 33, the driving rope 31 is in a straightened device, increasing the friction coefficient between it and the support wheels, so that it can rotate synchronously with the first support wheels 32 and the second support wheels 33. The output shaft of the motor 34 is connected to the central axis of the second support wheel 33 and is stably mounted relative to the bracket 1. Therefore, under the operation of the motor 34, the driving rope 31 can be controlled to rotate back and forth. In addition, a lower clamping plate 46 is fixedly installed at the end corner above the push frame 42. An upper clamping plate 47 is installed above the lower clamping plate 46 via bolts. The driving rope 31 passes through the space formed by the upper clamping plate 47 and the lower clamping plate 46. Therefore, when the driving rope 31 rotates back and forth, it can control the movement of the push frame 42. The lower clamping plates 46 of the third screening mechanism 7 and the second screening mechanism 4 are located at different end corners. Therefore, the third screening mechanism 7 and the push frame 42 of the second screening mechanism 4 move in opposite directions.

[0041] like Figure 1 、 Figure 6 As shown, to guide the movement of fertilizer, a second lower hopper 6 and a first lower hopper 5 are provided on the sides of the second screening mechanism 4 and the third screening mechanism 7, respectively. Two first lower hoppers 5 and two second lower hoppers 6 are provided, and the two similar lower hoppers are respectively arranged on the sides of the open end of the second support frame 45, with their top surfaces lower than the bottom surface of the push frame 42. Therefore, when the push frame 42 pushes the fertilizer to move away from the screening mechanism, it falls into the lower hopper and moves along the lower hopper to collect fertilizers of different particle sizes. The second lower hopper 6 and the first lower hopper 5 are connected and mounted on the bracket 1 by a connecting plate 13.

[0042] like Figure 1 、 Figure 5As shown, a first screening mechanism 2 can also be provided on the bracket 1. The first screening mechanism 2 is located below the third screening mechanism 7, and its aperture is less than or equal to that of the third screening mechanism 7. Therefore, under the action of the first screening mechanism 2, the fertilizer separated from the third screening mechanism 7 can be screened again to achieve the separation of powder and granules. The first screening mechanism 2 includes a first support frame 21 and a first screen 22. The first screen 22 is installed on the first support frame 21. A clamping groove 23 is provided on the outer side of the first support frame 21. The clamping plate 12 of the bracket 1 is installed in the clamping groove 23 through bolts. Similarly, with the cooperation of the clamping plate 12 and the clamping groove 23, the first screening mechanism 2 is stably installed on the bracket 1. When there is fertilizer accumulated on the first screen 22, the staff can turn the fertilizer to make the powder fall, and the intercepted fertilizer can be cleaned up.

[0043] Embodiment 2

[0044] As Figure 10 、 Figure 11 As shown, on the basis of Embodiment 1, in order to enhance the friction coefficient between the driving rope 31 and the second support wheel 33, the motor 34 is installed on the connecting plate 35, and a limiting wheel 36 is also provided on the side. The connecting plate 35 is fixedly connected to the bracket 1. The limiting wheel 36 presses against the driving rope 31 in contact with the second support wheel 33. Therefore, under the extrusion of the limiting wheel 36, the driving rope 31 deforms, and at the same time, the interaction force between it and the second support wheel 33 increases, increasing the friction force between the driving rope 31 and the second support wheel 33, which facilitates the control of the movement of the driving rope 31 under the action of the motor 34. In order to be able to adjust the position of the limiting wheel 36 according to requirements, the central axis of the limiting wheel 36 penetrates through the vertical plate 37. A plug plate 39 is fixedly provided at the bottom of the vertical plate 37, and an adjusting screw 38 is connected to the side. The plug plate 39 penetrates through the connecting plate 35, and the adjusting screw 38 is threadedly penetrated through the connecting plate 35. By rotating the adjusting screw 38, the relative movement of the plug plate 39 with respect to the connecting plate 35 can be controlled, thereby changing the height of the limiting wheel 36 to apply different pressures to the driving rope 31.

[0045] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screening device applicable to compound fertilizer granules, characterized in that, It includes a bracket (1), on which a second screening mechanism (4) and a third screening mechanism (7) are provided. The second screening mechanism (4) is located above the third screening mechanism (7), and the aperture is larger than that of the third screening mechanism (7). Both the second screening mechanism (4) and the third screening mechanism (7) are adjustable, and a second discharge bin (6) and a first discharge bin (5) are respectively provided on their sides.

2. The screening device for compound fertilizer particles according to claim 1, characterized in that, The second screening mechanism (4) includes a second screen (41), a second support frame (45) and a pushing frame (42). The second support frame (45) is arranged in a U-shaped structure with an upward opening. The second screen (41) is installed at the bottom of the second support frame (45). The pushing frame (42) is arranged above the second screen (41) and can move relative to the second support frame (45). At the same time, the bottom surface of the pushing frame (42) is in sliding contact with the inner bottom surface of the second support frame (45) and the upper side surface of the second screen (41).

3. The screening device for compound fertilizer particles according to claim 2, characterized in that, A snap plate (44) is fixedly arranged on the inner side wall of the second support frame (45), and a snap groove (43) is arranged on the side wall of the pushing frame (42). The snap plate (44) is located in the snap groove (43). A clamping groove (23) is arranged on the outer side surface of the second support frame (45), and a clamping plate (12) is fixedly arranged on the bracket (1). The clamping plate (12) is installed in the clamping groove (23) through a bolt connection.

4. A screening device for compound fertilizer particles according to claim 3, characterized in that, The third screening mechanism (7) has the same composition as the second screening mechanism (4). A driving mechanism (3) is arranged on the side of the third screening mechanism (7) and the second screening mechanism (4). The driving mechanism (3) is arranged deviating from the second discharge bin (6) and the first discharge bin (5).

5. A screening device for compound fertilizer particles according to claim 4, characterized in that, The driving mechanism (3) includes a driving rope (31), a motor (34), a plurality of first support wheels (32) and second support wheels (33). The driving rope (31) is arranged in a straight and annular structure and is in a U-shaped shape. The first support wheels (32) and the second support wheels (33) are respectively arranged horizontally and vertically and are respectively arranged at the end corners of the driving rope (31) and are connected to the bracket (1) at the same time. The output shaft of the motor (34) is connected to the central axis of the second support wheel (33).

6. The screening device for compound fertilizer particles according to claim 5, characterized in that, Lower clamping plates (46) are fixedly arranged at the end corners above the pushing frame (42). Upper clamping plates (47) are arranged above the lower clamping plates (46) through bolt connections. The driving rope (31) passes through the space formed by the upper clamping plates (47) and the lower clamping plates (46). The lower clamping plates (46) of the third screening mechanism (7) and the second screening mechanism (4) are located at different end corners.

7. A screening device for compound fertilizer particles according to claim 6, characterized in that, The motor (34) is installed on the connecting plate (35), and a limiting wheel (36) is further provided on the side. The limiting wheel (36) presses against the driving rope (31) in contact with the second supporting wheel (33). The central axis of the limiting wheel (36) penetrates through the vertical plate (37). A plug plate (39) is fixedly provided at the bottom of the vertical plate (37), and an adjusting screw rod (38) is connected to the side. The plug plate (39) penetrates through the connecting plate (35), and the adjusting screw rod (38) is threadedly penetrated through the connecting plate (35). The connecting plate (35) is fixedly connected to the bracket (1).

8. A screening device for compound fertilizer granules according to claim 1, characterized in that, A first screening mechanism (2) is further provided on the bracket (1). The first screening mechanism (2) is located below the third screening mechanism (7), and its aperture is less than or equal to the aperture of the third screening mechanism (7). The first screening mechanism (2) includes a first support frame (21) and a first screen (22). The first screen (22) is installed on the first support frame (21). A clamping groove (23) is provided on the outer side of the first support frame (21). The clamping plate (12) of the bracket (1) is installed in the clamping groove (23) through a bolt connection.

9. A screening device for compound fertilizer particles according to claim 6, characterized in that, There are two first discharge bins (5) and two second discharge bins (6). The two same-type discharge bins are respectively arranged on the sides of the opening ends of the second support frame (45), and the top surfaces are lower than the bottom surface of the pushing frame (42).

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