Multi-stage vibrating screen device for screening organic fertilizer raw materials

Abstract

The utility model discloses a multistage vibrating screen device for screening organic fertilizer raw materials, which belongs to the field of multistage vibrating screen devices, and comprises a screen box and a support frame, a damping spring is fixedly connected between the screen box and the support frame, and a limiting mechanism is arranged. The screw rod drives the transverse plate to move through the rotating block, along with downward movement of the transverse plate, the extrusion plate gradually breaks away from the extrusion state of the pressed plate, at the moment, the pressed plate pops up outwards under the elastic force action of the compression spring, and the limiting pin rod on the inner side wall of the pressed plate is disengaged from the limiting hole of the connecting block; an operator can easily pull out the screen from the mounting opening in the right side of the screen box through the handle without detaching numerous peripheral parts like traditional equipment and detaching the screen through an auxiliary tool, and therefore in actual production, when raw materials need to be replaced or product specifications need to be adjusted, the screen can be conveniently and rapidly detached. And the screens with corresponding mesh specifications can be quickly disassembled, assembled and replaced.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage vibrating screen devices, and in particular to a multi-stage vibrating screen device for screening organic fertilizer raw materials. Background Technology

[0002] A multi-stage vibrating screen is a device that uses vibration to classify and screen materials in multiple stages. It uses a motor to drive a vibrator, generating vibrations that create planar or three-dimensional vibration trajectories on the screen surface, causing the material to move and stratify. Smaller particles pass through the screen openings, while larger particles are retained on the screen surface, achieving separation of different particle sizes. Multi-stage vibrating screens are typically equipped with multiple layers of screens, allowing for multi-stage grading of materials to meet different particle size screening requirements. This equipment offers advantages such as high screening accuracy, large processing capacity, simple structure, low energy consumption, low noise, and long screen life. It is widely used in various industries including coal, mining, metallurgy, chemical, food, and environmental protection for screening and grading powder, granular, and dry powder materials.

[0003] In existing technologies, multi-stage vibrating screens are used in organic fertilizer production to screen raw materials, remove impurities, ensure uniform particle size, and improve the quality and production efficiency of organic fertilizer. Different particle sizes of raw materials need to be screened according to the requirements of producing different types of organic fertilizer. For example, the production of organic fertilizer specifically for flowers requires finer raw material particle size, while the production of organic fertilizer for ordinary farmland has relatively more lenient particle size requirements. When changing raw materials or adjusting product specifications, the original screen mesh size may no longer be suitable, requiring the replacement of the screen with a screen of the corresponding mesh size to meet the new particle size screening standards. However, existing multi-stage vibrating screens are usually composed of multiple screen layers stacked on top of each other, with each screen layer tightly connected and compactly arranged. The internal structure includes complex transmission components, support frames, etc. These structures are intertwined, and the screens are installed in such an environment, making the operating space extremely limited. When replacing the screens, it is necessary to first remove many peripheral components, such as protective shells and transmission devices. At the same time, after the peripheral components are removed, the screens are mostly fixed in the screen box by bolts and other fasteners, which further complicates the disassembly of the screens, resulting in a cumbersome operation process. This makes the disassembly and replacement of the screens inconvenient, consuming a lot of time and energy. In addition, it is also inconvenient to replace the screens after they have been worn and damaged over a long period of use. Utility Model Content

[0004] The main purpose of this invention is to provide a multi-stage vibrating screen device for screening organic fertilizer raw materials, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-stage vibrating screen device for screening organic fertilizer raw materials includes a screen box and a support frame. A shock-absorbing spring is fixedly connected between the screen box and the support frame. A vibrating motor is fixedly connected to the bottom surface of the screen box. Several discharge ports are fixedly connected to the left side of the bottom surface of the screen box, and a feed port is fixedly connected to the right side of the top surface of the screen box. Several screens are arranged inside the screen box from top to bottom, with the density of the screens increasing sequentially from top to bottom. The screens are fixedly connected inside the screen box by a limiting mechanism on the right side of the screen box, and the limiting mechanism includes a fixing... The screen box comprises a block, a screw, a horizontal plate, a vertical plate, an extrusion plate, a compression spring, and a pressure plate. A fixed block corresponding to the screen mesh is fixedly connected to the side wall of the right side plate of the screen box, and the pressure plate is movably connected to the fixed block through a limiting pin. The compression spring is fixedly connected between the pressure plate and the fixed block. The screw is movably connected to the fixed plate at the bottom right side of the screen box, and the screw is movably connected to the horizontal plate through a rotating block at the top. The vertical plate is fixedly connected to both sides of the top surface of the horizontal plate, and an extrusion plate corresponding to the pressure plate is fixedly connected to the inner side wall of the vertical plate.

[0007] Preferably, slots are provided on the front and rear side walls of the screen, and a handle is fixedly installed on the right side wall of the screen. A set of symmetrical connecting blocks are also fixedly installed on the right side wall of the screen, and limit holes are provided on the side walls of the connecting blocks.

[0008] Preferably, the right side wall of the sieve box has an installation port corresponding to the sieve mesh, and the inner walls of the sieve box are also fixedly installed with support strips corresponding to the slots at the installation ports.

[0009] Preferably, a set of symmetrical side plates are fixedly installed on the right side of the screen box, and a fixing block corresponding to the support strip is fixedly installed on the side wall of the side plate. A through hole is opened on the side wall of the fixing block, and a set of symmetrical guide strips are fixedly installed on the inner wall of the through hole. A sliding opening is also opened at the bottom of the side wall of the side plate. A fixing plate is fixedly installed at the bottom of the right side wall of the screen box, and a screw hole is opened on the top surface of the fixing plate.

[0010] Preferably, the screw is threaded into the screw hole, and a handwheel is fixedly installed at the bottom end of the screw. A rotating block is fixedly installed at the top end of the screw. A set of symmetrical sliders is fixedly installed on the side wall of the horizontal plate, and the sliders are movably installed in the sliding opening. An inverted convex groove is opened on the bottom surface of the horizontal plate, and the rotating block is movably installed in the convex groove. A set of symmetrical vertical plates is also fixedly installed on the top surface of the horizontal plate, and several semi-circular extrusion plates are fixedly installed on the opposite walls of the symmetrical vertical plates.

[0011] Preferably, the pressure plate is semi-circular in shape, and a limiting pin is fixedly installed on the inner side wall of the pressure plate. The limiting pin passes through the through hole and is inserted into the limiting hole. A guide groove corresponding to the guide bar is opened on the outer wall of the limiting pin. The compression spring is sleeved on the outside of the limiting pin, and the compression spring is also fixedly installed between the opposite walls of the compression spring and the fixing block.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, the limiting mechanism allows the operator to easily replace the screen by simply turning the handwheel, which rotates the screw. The screw, through a rotating block, moves the horizontal plate. As the horizontal plate moves downwards, the pressing plate gradually disengages from the pressure plate. At this point, the pressure plate springs outwards under the force of the compression spring, and the limiting pin on its inner wall disengages from the limiting hole in the connecting block. The operator can then easily pull the screen out from the mounting port on the right side of the screen box using the handle. Unlike traditional equipment, this eliminates the need to disassemble numerous peripheral components and use auxiliary tools to remove fasteners before disassembling the screen. Therefore, in actual production, when raw materials need to be changed or product specifications adjusted, the screen with the corresponding mesh size can be quickly disassembled and replaced. It also facilitates the replacement of worn or damaged screens, achieving the goal of quick disassembly and replacement of the screen. This significantly saves time and effort in screen replacement, improves work efficiency, reduces labor and time costs associated with screen replacement, shortens equipment downtime, increases equipment utilization, and ensures production continuity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 This is a cross-sectional schematic diagram of the sieve box of this utility model;

[0017] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A;

[0018] Figure 5 This is a schematic diagram of the overall structure of the sieve of this utility model;

[0019] Figure 6 This is a structural breakdown diagram of the limiting mechanism of this utility model;

[0020] Figure 7 This is a cross-sectional schematic diagram of the horizontal plate of this utility model;

[0021] Figure 8 This is a schematic diagram of the overall structure of the limiting pin of this utility model.

[0022] In the diagram: 1. Screen box; 2. Support frame; 3. Shock-absorbing spring; 4. Vibration motor; 5. Discharge port; 6. Feed port; 7. Screen mesh; 8. Limiting mechanism; 9. Mounting port; 10. Support insert; 11. Fixing plate; 12. Screw hole; 13. Side plate; 14. Fixing block; 15. Through hole; 16. Guide bar; 17. Sliding mouth; 18. Slot; 19. Handle; 20. Connecting block; 21. Limiting hole; 22. Screw; 23. Handwheel; 24. Rotating block; 25. Horizontal plate; 26. Sliding block; 27. Protrusion groove; 28. Vertical plate; 29. ​​Extrusion plate; 30. Limiting pin; 31. Guide groove; 32. Compression spring; 33. Pressure plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 - Figure 8 As shown, a multi-stage vibrating screen device for screening organic fertilizer raw materials includes a screen box 1 and a support frame 2. A shock-absorbing spring 3 is fixedly connected between the screen box 1 and the support frame 2. A vibrating motor 4 is fixedly connected to the bottom surface of the screen box 1. Several discharge ports 5 are fixedly connected to the left side of the bottom surface of the screen box 1, and a feed port 6 is fixedly connected to the right side of the top surface of the screen box 1. Several screens 7 are arranged inside the screen box 1 from top to bottom, and the density of the screens 7 increases from top to bottom.

[0025] The screening principle of this multi-stage vibration screening device for organic fertilizer raw materials is as follows:

[0026] When the vibration motor 4 is started, the vibration motor 4 generates vibration force to make the screen box 1 vibrate. The shock-absorbing spring 3 between the screen box 1 and the support frame 2 plays a buffering and shock-absorbing role. The organic fertilizer raw material is poured into the screen box 1 from the feed port 6. The raw material falls on the uppermost screen 7. The vibration of the screen box 1 makes the raw material jump and roll on the screen 7. Since the density of the screen 7 increases from top to bottom, the upper screen 7 has larger mesh, and the small particles of the raw material pass through the mesh and fall to the next screen 7. The large particles remain in this layer and move towards the discharge port 5, and are finally discharged from the discharge port 5. The smaller particles of the raw material that fall through the upper screen 7 fall onto the lower screen 7 and continue to be screened according to the mesh size of the screen 7. The raw material that meets the mesh size falls through the screen 7, and the raw material that does not meet the mesh size moves towards the discharge port 5 and is discharged. In this way, the organic fertilizer raw material is screened layer by layer, and the organic fertilizer raw material is discharged from different discharge ports 5 according to different particle sizes, thus completing multi-stage screening.

[0027] The screen 7 is fixedly connected to the inside of the screen box 1 by the limiting mechanism 8 on the right side of the screen box 1. The limiting mechanism 8 includes a fixing block 14, a screw 22, a horizontal plate 25, a vertical plate 28, a pressing plate 29, a compression spring 32, and a pressure plate 33. The fixing block 14 corresponding to the screen 7 is fixedly connected to the side wall of the right side plate 13 of the screen box 1. The pressure plate 33 is movably connected to the fixing block 14 through the limiting pin 30. The compression spring 32 is fixedly connected between the pressure plate 33 and the fixing block 14. The screw 22 is movably connected to the fixing plate 11 at the bottom right side of the screen box 1. The screw 22 is movably connected to the horizontal plate 25 through the rotating block 24 at the top. The vertical plate 28 is fixedly connected to both sides of the top surface of the horizontal plate 25. The pressing plate 29 corresponding to the pressure plate 33 is fixedly connected to the inner side wall of the vertical plate 28.

[0028] like Figure 5 As shown, slots 18 are provided on the front and rear side walls of the screen 7. The slots 18 can be used with the support strip 10 to position and install the screen. A handle 19 is fixedly installed on the right side wall of the screen 7. The handle 19 facilitates the disassembly and assembly of the screen 7. A set of symmetrical connecting blocks 20 is also fixedly installed on the right side wall of the screen 7. A limiting hole 21 is provided on the side wall of the connecting block 20. The limiting hole 21 on the side wall of the connecting block 20 is used to cooperate with the limiting pin 30 to limit and fix the screen 7.

[0029] like Figure 3 and Figure 4 As shown, an installation port 9 corresponding to the screen 7 is provided on the right side wall of the screen box 1. The screen 7 can be inserted into the screen box 1 through the installation port 9. Support strips 10 corresponding to the slots 18 are also fixedly installed on both sides of the inner wall of the screen box 1 at the installation port 9. After the support strips 10 are inserted into the slots 18, they can provide a limiting support for the screen 7.

[0030] like Figure 3 and Figure 4As shown, a set of symmetrical side plates 13 are fixedly installed on the right side of the screen box 1, and a fixing block 14 corresponding to the support insert 10 is fixedly installed on the side wall of the side plate 13. A through hole 15 is opened on the side wall of the fixing block 14, and a set of symmetrical guide bars 16 are fixedly installed on the inner wall of the through hole 15, which can ensure that the limit pin 30 moves laterally in the through hole 15 along the guide bar 16. A sliding opening 17 is also opened at the bottom of the side wall of the side plate 13. The sliding opening 17 is used to cooperate with the slider 26 to realize the guiding sliding operation. A fixing plate 11 is fixedly installed at the bottom of the right side wall of the screen box 1, and a screw hole 12 is opened on the top surface of the fixing plate 11. The screw hole 12 is used to cooperate with the screw 22 to realize the threaded rotation operation.

[0031] like Figure 6 As shown, the screw 22 is threaded into the screw hole 12, and a handwheel 23 is fixedly installed at the bottom end of the screw 22. A rotating block 24 is fixedly installed at the top end of the screw 22. A set of symmetrical sliders 26 are fixedly installed on the side wall of the horizontal plate 25, and the sliders 26 are movably installed in the sliding opening 17. An inverted protrusion 27 is opened on the bottom surface of the horizontal plate 25, and the rotating block 24 is movably installed in the protrusion 27. A set of symmetrical vertical plates 28 are also fixedly installed on the top surface of the horizontal plate 25, and several semi-circular extrusion plates 29 are fixedly installed on the opposite side wall of the symmetrical vertical plates 28. Rotating the handwheel 23 drives the screw 22 to rotate, so that the screw 22 drives the horizontal plate 25 to move upward through the rotating block 24. During the movement, the extrusion plates 29 on the inner side wall of the top vertical plate 28 extrude pressure on the pressure plate 33.

[0032] like Figure 6 , Figure 7 and Figure 8 As shown, the pressure plate 33 is semi-circular in shape, and a limiting pin 30 is fixedly installed on the inner side wall of the pressure plate 33. The limiting pin 30 passes through the through hole 15 and is inserted into the limiting hole 21. The outer wall of the limiting pin 30 is provided with a guide groove 31 corresponding to the guide bar 16. The compression spring 32 is fitted on the outside of the limiting pin 30, and the compression spring 32 is also fixedly installed between the opposite walls of the compression spring 32 and the fixing block 14. When the pressure plate 33 is squeezed, it will push the limiting pin 30 so that the limiting pin 30 passes through the guide groove 31 and along the guide bar 16 through the through hole 15 and moves inward. This forces the compression spring 32 to tighten until the limiting pin 30 is inserted into the limiting hole 21. The screen 7 to be used can then be installed and fixed in the screen box 1, and the screen 7 can be easily disassembled and replaced later.

[0033] The specific operating principle of the limiting mechanism 8 in conjunction with this multi-stage vibration screening device is as follows:

[0034] When the screen 7 needs to be replaced according to the screening requirements of organic fertilizer raw materials, manually rotate the handwheel 23 located below the fixed plate 11. The handwheel 23 will drive the screw 22 to rotate in the screw hole 12 opened on the top surface of the fixed plate 11 and move downward. The screw 22 will also drive the rotating block 24 at the top to rotate in the groove 27 opened on the top surface of the horizontal plate 25. The rotating block 24 will drive the horizontal plate 25 to move downward. During the downward movement of the horizontal plate 25, the slider 26 installed on its side wall will slide in the sliding opening 17 opened on the side wall of the side plate 13. At the same time, as the horizontal plate 25 moves downward... As the plate moves downwards, the semi-circular pressing plate 29, mounted on the opposite wall of the vertical plate 28 symmetrical to the top of the horizontal plate 25, will no longer press the corresponding semi-circular pressure plate 33. After the pressure plate 33 loses the pressing force from the pressing plate 29, the compression spring 32, installed between the fixing block 14 and the pressure plate 33 and fitted outside the limiting pin 30, will elastically extend and push the pressure plate 33 outwards until the pressure plate 33 is blocked by the vertical plate 28. At this time, the pressure plate 33 will also drive the limiting pin 30 to move outwards, and the limiting pin 30 will pass through the outer wall. The guide groove 31 on the upper part moves along the guide bar 16 into the through hole 15 on the side wall of the fixing block 14 until the limiting pin 30 moves out of the limiting hole 21 on the side wall of the connecting block 20. This releases the limiting of the screen 7 in the screen box 1. At the same time, the screen 7 is pulled out from the corresponding mounting port 9 on the right side wall of the screen box 1 by using the handle 19, thus completing the disassembly of the screen 7. Finally, the screen 7 to be replaced is reinserted into the screen box 1 through the mounting port 9 by using the handle 19, and the support bar 10 in the screen box 1 is inserted into the through holes on the front and rear side walls of the screen 7. After the corresponding slot 18 is inserted and the screen 7 is supported and limited, the handwheel 23 is rotated in the opposite direction to make the screw 22 rotate and push the horizontal plate 25 upward through the rotating block 24. The vertical plate 28 on the top surface of the horizontal plate 25 will move upward synchronously. When it moves upward, the pressure plate 29 will press the pressure plate 33 inward, forcing the compression spring 32 to tighten. Then, the limiting pin 30 will pass through the through hole 15 and be inserted into the limiting hole 21. The screen 7 can be installed and fixed inside the screen box 1 for use, thereby facilitating the quick disassembly and replacement of the screen 7 in the multi-stage vibrating screen.

[0035] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, alterations, additions, or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A multi-stage vibrating screen device for screening organic fertilizer raw materials, comprising a screen box (1) and a support frame (2), wherein a shock-absorbing spring (3) is fixedly connected between the screen box (1) and the support frame (2), and a vibrating motor (4) is fixedly connected to the bottom surface of the screen box (1), wherein a plurality of discharge ports (5) are fixedly connected to the left side of the bottom surface of the screen box (1), and a feed port (6) is fixedly connected to the right side of the top surface of the screen box (1), wherein a plurality of screens (7) are arranged inside the screen box (1) from top to bottom, and the density of the screens (7) increases sequentially from top to bottom, characterized in that: The screen (7) is fixedly connected to the inside of the screen box (1) by a limiting mechanism (8) on the right side of the screen box (1). The limiting mechanism (8) includes a fixing block (14), a screw (22), a horizontal plate (25), a vertical plate (28), a pressing plate (29), a compression spring (32), and a pressure plate (33). A fixing block (14) corresponding to the screen (7) is fixedly connected to the side wall of the right side plate (13) of the screen box (1). The pressure plate (33) is connected to the fixing block by a limiting pin (30). (14) Movable connection, the compression spring (32) is fixedly connected between the pressure plate (33) and the fixing block (14), the screw (22) is movably connected to the fixing plate (11) at the bottom right side of the sieve box (1), and the screw (22) is movably connected to the horizontal plate (25) through the rotating block (24) at the top, the vertical plate (28) is fixedly connected to both sides of the top surface of the horizontal plate (25), and the inner side wall of the vertical plate (28) is fixedly connected to the extrusion plate (29) corresponding to the pressure plate (33).

2. The multi-stage vibrating screen device for screening organic fertilizer raw materials according to claim 1, characterized in that: The screen (7) has slots (18) on its front and rear side walls respectively, and a handle (19) is fixedly installed on the right side wall of the screen (7). A set of symmetrical connecting blocks (20) is also fixedly installed on the right side wall of the screen (7), and a limit hole (21) is opened on the side wall of the connecting block (20).

3. The multi-stage vibrating screen device for screening organic fertilizer raw materials according to claim 2, characterized in that: The screen box (1) has an installation port (9) corresponding to the screen (7) on the right side wall, and the inner walls of the screen box (1) are also fixedly installed with support strips (10) corresponding to the slots (18) at the installation port (9).

4. The multi-stage vibrating screen device for screening organic fertilizer raw materials according to claim 3, characterized in that: A set of symmetrical side plates (13) are fixedly installed on the right side of the sieve box (1), and a fixing block (14) corresponding to the support insert (10) is fixedly installed on the side wall of the side plate (13). A through hole (15) is opened on the side wall of the fixing block (14), and a set of symmetrical guide bars (16) is fixedly installed on the inner wall of the through hole (15). A sliding mouth (17) is also opened below the side wall of the side plate (13). A fixing plate (11) is fixedly installed at the bottom of the right side wall of the sieve box (1), and a screw hole (12) is opened on the top surface of the fixing plate (11).

5. The multi-stage vibrating screen device for screening organic fertilizer raw materials according to claim 4, characterized in that: The screw (22) is threaded into the screw hole (12), and a handwheel (23) is fixedly installed at the bottom end of the screw (22). A rotating block (24) is fixedly installed at the top end of the screw (22). A set of symmetrical sliders (26) are fixedly installed on the side wall of the horizontal plate (25), and the sliders (26) are movably installed in the sliding opening (17). An inverted convex groove (27) is opened on the bottom surface of the horizontal plate (25), and the rotating block (24) is movably installed in the convex groove (27). A set of symmetrical vertical plates (28) are also fixedly installed on the top surface of the horizontal plate (25), and several semi-circular extrusion plates (29) are fixedly installed on the opposite side walls of the symmetrical vertical plates (28).

6. The multi-stage vibrating screen device for screening organic fertilizer raw materials according to claim 5, characterized in that: The pressure plate (33) is semi-circular in shape, and a limit pin (30) is fixedly installed on the inner side wall of the pressure plate (33). The limit pin (30) passes through the through hole (15) and is inserted into the limit hole (21). The outer wall of the limit pin (30) is provided with a guide groove (31) corresponding to the guide bar (16). The compression spring (32) is fitted on the outside of the limit pin (30), and the compression spring (32) is also fixedly installed between the opposite walls of the compression spring (32) and the fixing block (14).

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