Multifunctional screening device for powder metallurgy production

Abstract

The utility model discloses a multifunctional screening device for powder metallurgy production, including screening protection case and granule packing, the granule packing bottom's discharge pump machine passes through the hose butt joint and passes the guide pipe of protection case opening, screening protection case inside swing mounting has screening frame, screening protection case inside swing mounting has screening frame, screening frame and guide pipe butt joint have screening subassembly. Through setting up two inclination different and can switch work state's screening frame, effectively solved the problem that traditional single filter screen screening device is easy to block. When one screening frame completes screening work, can switch to another screening frame and continue to work rapidly, need not stop and clean up the filter screen that blocks. In the switching process, unqualified granule can discharge in time, avoided the accumulation of unqualified granule in the screening frame, guaranteed the continuity and high efficiency of screening process, improved the overall production efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy production technology, and in particular to a multifunctional screening device for powder metallurgy production. Background Technology

[0002] Powder metallurgy is an advanced forming process that uses metal powders as the matrix raw material. Through precise proportioning, pressing, and high-temperature sintering, it can prepare metal materials and composite materials with special properties. Compared with traditional casting processes, this technology can achieve near-net-shape forming, significantly reduce material loss, and optimize the mechanical properties and microstructure of the final product by controlling powder characteristics. In the powder metallurgy production process, the particle size uniformity of the raw material powder directly affects the density, dimensional accuracy, and mechanical properties of the sintered body. If the powder particles are unevenly distributed, it may lead to large differences in shrinkage during sintering, resulting in internal defects or surface roughness. Therefore, the metal powder particles must be sieved before forming to ensure that their particle size distribution meets the process requirements.

[0003] The applicant's research revealed that existing screening devices generally employ a single filter screen design. In actual production, as screening time increases, substandard particles gradually accumulate on the filter screen surface, causing screen blockage and severely impacting screening efficiency. At this point, the machine must be stopped and the filter screen disassembled for manual cleaning, which is not only cumbersome and time-consuming but also causes production interruptions, reducing overall production efficiency. Furthermore, frequent disassembly and reassembly operations may accelerate filter screen wear, shorten its lifespan, and further increase production costs.

[0004] Therefore, the applicant proposes a multi-functional screening device for powder metallurgy production to solve this problem. Utility Model Content

[0005] This invention provides a multifunctional screening device for powder metallurgy production, which solves the problems mentioned in the background.

[0006] To solve the above technical problems, this utility model provides a multi-functional screening device for powder metallurgy production, including a screening protective box and a particle box. The discharge pump at the bottom of the particle box is connected to a guide pipe passing through the opening of the protective box via a flexible hose. A screening frame is movably installed inside the screening protective box. The screening frame is connected to the guide pipe with screening components.

[0007] The feed pipe is connected to the screening protection box by a translation drive assembly;

[0008] The screening assembly includes two screening frames rotatably connected inside the screening frame. The screening frames are provided with frame plates on both sides. A cylindrical block is attached to the inner side of the frame plate. The cylindrical block is fixed to both ends of the inner side of the moving plate. The top of the moving plate is connected to the guide pipe located inside the screening protection box via an L-shaped plate. The moving plate is slidably installed inside the screening frame.

[0009] Preferably, the protrusion on one side of the movable plate is slidably mounted on the horizontal rod, the horizontal rod is fixed inside the screening frame, and the horizontal rod is fixedly fitted with a protective shell, the protective shell covers the protrusion on one side of the movable plate inside, and the protective shell is designed to fit the side of the movable plate with an opening.

[0010] One side of the protective shell is always in contact with the moving plate.

[0011] Preferably, the bottom of the movable plate is equipped with rollers, which roll on the surface of the crossbeam. The crossbeam is fixed inside the screening frame, and the protective shell is fixed to the top of the crossbeam.

[0012] Preferably, the two screening frames are rotatably connected to the inner sides of two T-shaped plates a fixed inside the screening frame, and the T-shaped plates a are located inside the L-shaped plates.

[0013] Preferably, one side of the screening frame is designed with an arc surface and is provided with a discharge port. The arc surface of one side of the screening frame is in contact with the arc plate, and the arc plate is fixed inside the screening frame.

[0014] The arc plate can close the discharge port by rotating upwards through the screening frame.

[0015] Preferably, a discharge plate is provided through the openings on both sides of the screening frame, and a recycling box is provided at the bottom of the screening protection box on one side of the discharge plate. The two sides of the discharge plate are attached to the inner side of the protective plate fixed at the bottom of the screening frame, and the upper end of the discharge plate contacts its bottom surface when the screening frame is tilted.

[0016] A collection box is installed at the bottom of the screening protection box, inside the screening frame.

[0017] Preferably, the screening frame is fixed with a support plate at the lower inner end and the upper outer end. The support plate is connected to the screening protection box with an elastic telescopic rod. An eccentric block excitation device is installed at the bottom of the support plate at the upper outer end to drive the screening frame to move vertically up and down.

[0018] Compared with related technologies, the multifunctional screening device for powder metallurgy production provided by this utility model has the following beneficial effects:

[0019] By setting up two screening frames with different inclinations and switchable operating states, the problem of easy clogging in traditional single-screen screening devices is effectively solved. Once one screening frame completes its screening work, it can quickly switch to the other to continue operation without stopping the machine to clean the clogged screen. During the switching process, unqualified particles can be discharged in a timely manner, preventing their accumulation within the screening frame, ensuring the continuity and efficiency of the screening process, and greatly improving overall production efficiency.

[0020] Through the design of the translation drive assembly, the plate is slidably connected by the guide tube, which does not affect the small up-and-down movement of the guide tube during vibration, and can always keep the protective box opening through which the guide tube passes closed when moving left and right. This design effectively prevents the dust generated by internal screening from overflowing, optimizes the working environment, reduces the harm to the health of operators, and at the same time reduces the corrosion of external parts of the equipment by dust, extends the service life of the equipment, and only requires periodic maintenance of the threaded block and lead screw, making operation simple. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure of this utility model;

[0023] Figure 3 This is a front view of the overall cross-sectional structure of this utility model;

[0024] Figure 4 This is a schematic diagram of a partial internal structure of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the screening component of this utility model;

[0026] Figure 6 This is a partial three-dimensional structural diagram of the screening component of this utility model. Figure 1 ;

[0027] Figure 7 This is a three-dimensional structural diagram of the screening and protection box of this utility model;

[0028] Figure 8 This is a partial three-dimensional structural diagram of the screening component of this utility model. Figure 2 ;

[0029] Figure 9 This is a frontal cross-sectional view of the screening frame of this utility model.

[0030] The diagram is labeled as follows: 1. Screening protective box; 11. Particle packing box; 13. Feed guide pipe; 14. Screening frame; 15. Eccentric block vibration device; 16. Elastic telescopic rod; 17. Recycling box; 18. Collection box; 2. Translation drive assembly; 21. Threaded block; 22. Lead screw; 23. Motor; 24. Synchronization device; 25. Plate; 3. Screening assembly; 31. Screening frame; 32. Cylindrical block; 33. Frame plate; 34. Moving plate; 35. L-shaped plate; 36. Horizontal bar; 37. Protective shell; 38. Roller; 39. Crossbeam; 310. Arc plate; 311. Discharge plate; 312. Protective plate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] Depend on Figures 1-9 The present invention provides a screening and protective box 1 and a pellet packing box 11 (the pellet packing box 11 is prior art, and its installation structure will not be described in detail). The discharge pump at the bottom of the pellet packing box 11 is connected via a flexible hose to a guide pipe 13 passing through the opening of the protective box 1 (the discharge pump is a conventional design). A screening frame 14 is movably installed inside the screening and protective box 1. The screening frame 14 is connected to the guide pipe 13 via a screening assembly 3. A translation drive assembly 2 connects the guide pipe 13 to the screening and protective box 1. The screening assembly 3 includes two screening frames 31 rotatably connected inside the screening frame 14. The screening frames 31 are provided with frame plates 33 on both sides. A cylindrical block 32 is attached to the inner side of the frame plate 33. The cylindrical block 32 is fixed to both ends of the inner side of the moving plate 34. The top of the moving plate 34 is connected to the side wall of the guide pipe 13 located inside the screening protection box 1 through an L-shaped plate 35. The moving plate 34 is slidably installed inside the screening frame 14. It should be noted that the two screening frames 31 are always in an inclined state, only with different inclinations. The screening frames 31 are parallel to the frame plate 33.

[0033] A protrusion on one side of the movable plate 34 is slidably mounted on the horizontal rod 36. The horizontal rod 36 is fixed inside the screening frame 14, and a protective shell 37 is fixedly inserted through the horizontal rod 36. The protective shell 37 covers the protrusion on one side of the movable plate 34, and the side of the protective shell 37 that fits against the movable plate 34 is designed to be open. One side of the protective shell 37 is always in contact with the movable plate 34, thus ensuring that the sliding connection between the horizontal rod 36 and the movable plate 34 is not affected by dust. A roller 38 is installed at the bottom of the movable plate 34. The roller 38 rolls on the surface of the crossbeam 39. A rubber pad or similar material can be placed on the surface of the roller 38, so that if dust falls onto the crossbeam 39, it will not have a significant impact. The roller 38 can further improve the connection between them. The crossbeam 39 is fixed inside the screening frame 14, and the protective shell 37 is fixed to the top of the crossbeam 39 to improve the connection strength. Support plates are fixed at the lower inner end and the upper outer end of the screening frame 14. The support plate is connected to the screening protection box 1 by an elastic telescopic rod 16, and an eccentric block excitation device 15 is installed at the bottom of the support plate on the upper outer side. The eccentric block excitation device 15 and the elastic telescopic rod 16 are installed on the frame plate fixed on the inner wall of the screening protection box 1. The eccentric block excitation device 15 is used to drive the screening frame 14 to move vertically up and down. The eccentric block excitation device 15 and the elastic telescopic rod 16 are in the existing conventional vertical vibrating screening structure design. The principle is not described in detail here. The two screening frames 31 are rotatably connected to the inner side of the two T-shaped plates a fixed inside the screening frame 14. The T-shaped plates a are located inside the L-shaped plate 35. One side of the screening frame 31 is designed with an arc surface and is provided with a discharge port. The arc surface of one side of the screening frame 31 fits with the arc plate 310. The arc plate 310 is fixed inside the screening frame 14. The arc plate 310 can close the discharge port by rotating the screening frame 31 upward.

[0034] Through the above structural design, the metal powder raw material is transported from the particle box 11 to a screening frame 31 through the discharge pump and the guide pipe 13. This screening frame 31 is more horizontal, while the other screening frame 31 is not working and has a higher downward inclination. This can be understood as the cylindrical block 32 in the horizontal screening frame 31 being away from its axis of rotation, and the discharge port being blocked by the arc plate 310. The cylindrical block 32 in the downward inclination screening frame 31 is close to its rotation point, and the discharge port is open. Then the eccentric block excitation device 15 is started, and the screening frame 14 is driven to vibrate vertically up and down through the elastic telescopic rod 16 for screening. The screened particles enter the collection box 18. During this process, the guide pipe 13 moves up and down in a small range along with the moving plate 34 and the horizontal rod 36. The hose connection meets the requirements of vertical vibration.

[0035] After one round of screening is completed, the working state of the screening frame 31 needs to be switched to discharge unqualified particles. At this time, vibration is paused, and only unqualified particles remain in the screening frame 31. The translation drive component 2 is activated, causing the guide pipe 13 to drive the moving plate 34 to slide on one side of the horizontal rod 36 via the L-shaped plate 35. As the moving plate 34 moves horizontally, the position of the cylindrical block 32 inside the frame plate 33 changes. For the screening frame 31, which was originally inclined to be horizontal and was carrying out screening work, as the cylindrical block 32 moves closer to its axis of rotation, the screening frame 31, under the interaction of the cylindrical block 32 and the frame plate 33, As the tilt angle gradually increases, the contact relationship between the arc surface on one side of the screening frame 31 and the arc plate 310 changes, and the discharge port that was originally blocked by the arc plate 310 gradually opens. At this time, the unqualified particles that were left in the screening frame 31 during the previous screening process move along the tilted screening frame 31 toward the discharge port and are finally discharged from the screening frame 31 through the discharge port. At the same time, the screening frame 31 on the other side rotates upward to block the discharge port and guide the material. As for the screening frame 31 that was originally tilted at a high angle and whose discharge port was open and not working, the cylindrical block 32 gradually moves away from its rotation point as the moving plate 34 moves. This causes the tilt angle of the screening frame 31 to gradually decrease, tending towards a horizontal state. At the same time, the degree of contact between the arc surface on one side of the screening frame 31 and the arc plate 310 gradually increases, and the discharge port is gradually blocked and closed by the arc plate 310. When the moving plate 34 moves to the designated position, the screening frame 31 is completely in a horizontal working state, the discharge port is closed, and it is ready to receive new metal powder raw materials from the particle box 11 through the discharge pump and the guide pipe 13 for the next round of screening. At the same time, during the next round of vibrating screening, the non-working screening frame 31 can further discharge some stuck particles through vibration.

[0036] A discharge plate 311 is installed through the openings on both sides of the screening frame 14, and a recycling box 17 is installed at the bottom of the screening protection box 1 on one side of the discharge plate 311. The two sides of the discharge plate 311 are attached to the inner side of the protective plate 312 fixed at the bottom of the screening frame 31. The upper end of the discharge plate 311 contacts the bottom surface of the screening frame 31 when it is tilted down to open the discharge port. A collection box 18 is installed at the bottom of the screening protection box 1 inside the screening frame 14.

[0037] By using the discharge plate 311, the discharge port is opened by tilting the screening frame 31 downwards to fit a small portion of the upper part of the discharge plate 311, allowing the unqualified material to be discharged into the recycling bin 17. Note that a small portion of the upper edge of the discharge plate 311 is located below the edge of one end of the screening frame 31. However, a filter surface may not be provided at the overlapping position between the screening frame 31 and the upper part of the discharge plate 311. Simultaneously, a discharge hopper surrounding the filter surface is installed at the bottom of the screening frame 31. Figure 9As shown in Figure c (the rest of the figures are not shown), the protective plate 312 always slides in close contact with both sides of the discharge plate 311, which enhances the connection strength between the screening frame 31 and the screening frame 14 and makes it more stable in the front and back directions. The outer walls of the two protective plates 312 are aligned with the front and back of the screening frame 31.

[0038] The translation drive assembly 2 includes a plate 25 that slides on the top of the screening protective box 1, and the plate 25 is slidably connected by the guide pipe 13. The threaded block 21 on the top of the plate 25 is threadedly connected to the lead screw 22. The lead screw 22 is rotatably installed between two vertical plates on the top of the screening protective box 1. A motor 23 is installed on the top of the screening protective box 1 to drive one lead screw 22 to rotate, and the two lead screws 22 are connected to a synchronization device 24 (a conventional design, such as pulleys on the shafts of the two connected lead screws 22, with belts on the pulleys, etc. The structure and principle are not described in detail, as they are common knowledge). This device drives the two lead screws 22 to rotate together. When the plate 25 moves left and right, it always closes the opening of the protective box 1 through which the guide pipe 13 passes, which prevents the dust generated during screening from overflowing. This well takes into account the cleanliness requirements of the threaded block 21 and the lead screw 22, and the dust in the environment can be controlled. Only periodic maintenance of the threaded block 21 and the lead screw 22 is required.

[0039] As described above, the plate 25 is connected to the guide pipe 13 by a sliding connection. When vibration is not affected, the guide pipe 13 moves up and down slightly. When the screening frame 31 needs to be switched, the motor 23 starts when the guide pipe 13 and the moving plate 34 are moved horizontally. This drives the lead screw 22 connected to it to start rotating. Due to the presence of the synchronization device 24, the two lead screws 22 rotate synchronously. The rotation of the lead screw 22 causes the threaded block 21 to move linearly along the axial direction of the lead screw 22, thereby driving the plate 25 to slide horizontally on the top of the screening protection box 1. As the guide pipe 13 moves horizontally, the moving plate 34 is also driven and begins to slide on the horizontal bar 36. As the moving plate 34 moves horizontally, the position of the cylindrical block 32 inside the frame plate 33 changes, thereby adjusting and discharging unqualified particles.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional screening device for powder metallurgy production, comprising a screening protection box (1) and a particle packing box (11), wherein the discharge pump at the bottom of the particle packing box (11) is connected to a guide pipe (13) passing through the opening of the protection box (1) via a flexible hose, and a screening frame (14) is movably installed inside the screening protection box (1), characterized in that: The screening protection box (1) is equipped with a screening frame (14) inside, and the screening frame (14) is connected to the guide pipe (13) with a screening component (3). The feed pipe (13) is connected to the screening protection box (1) by a translation drive assembly (2); The screening assembly (3) includes two screening frames (31) rotatably connected inside the screening frame (14). The screening frames (31) are provided with frame plates (33) on both sides. A cylindrical block (32) is attached to the inner side of the frame plate (33). The cylindrical block (32) is fixed to both ends of the inner side of the moving plate (34). The top of the moving plate (34) is connected to the guide pipe (13) located inside the screening protection box (1) via an L-shaped plate (35). The moving plate (34) is slidably installed inside the screening frame (14).

2. The multifunctional screening device for powder metallurgy production according to claim 1, characterized in that, The protrusion on one side of the movable plate (34) is slidably mounted on the horizontal rod (36). The horizontal rod (36) is fixed inside the screening frame (14), and the horizontal rod (36) is fixedly fitted with a protective shell (37). The protective shell (37) covers the protrusion on one side of the movable plate (34) inside, and the protective shell (37) is designed to fit the movable plate (34) with an opening on one side. One side of the protective shell (37) is always in contact with the movable plate (34).

3. The multifunctional screening device for powder metallurgy production according to claim 2, characterized in that, The bottom of the movable plate (34) is equipped with rollers (38), which roll on the surface of the crossbeam (39). The crossbeam (39) is fixed inside the screening frame (14), and the protective shell (37) is fixed on the top of the crossbeam (39).

4. The multifunctional screening device for powder metallurgy production according to claim 2, characterized in that, The two screening frames (31) are rotatably connected to the inner sides of two T-shaped plates a fixed inside the screening frame (14), and the T-shaped plates a are located inside the L-shaped plate (35).

5. A multifunctional screening device for powder metallurgy production according to claim 1, characterized in that, The screening frame (31) has an arc surface design on one side and a discharge port. The arc surface on one side of the screening frame (31) is in contact with the arc plate (310). The arc plate (310) is fixed inside the screening frame (14). The arc plate (310) can close the discharge port by rotating upward through the screening frame (31).

6. A multifunctional screening device for powder metallurgy production according to claim 5, characterized in that, The screening frame (14) has a discharge plate (311) through the openings on both sides, and a recycling box (17) is provided at the bottom of the screening protection box (1) on one side of the discharge plate (311). The two sides of the discharge plate (311) are attached to the inner side of the protective plate (312) fixed at the bottom of the screening frame (31). The upper end of the discharge plate (311) contacts the bottom surface of the screening frame (31) when it is tilted. A collection box (18) is installed at the bottom of the screening protection box (1) inside the screening frame (14).

7. A multifunctional screening device for powder metallurgy production according to claim 5, characterized in that, The translation drive assembly (2) includes a flat plate (25) that slides on the top of the screening protection box (1), and the flat plate (25) is slidably connected by a guide pipe (13). The threaded block (21) on the top of the flat plate (25) is threadedly connected to the lead screw (22). The lead screw (22) is rotatably installed between two vertical plates on the top of the screening protection box (1). A motor (23) is installed on the top of the screening protection box (1) to drive one lead screw (22) to rotate, and the two lead screws (22) are connected to a synchronization device (24) to drive the two lead screws (22) to rotate together.

8. A multifunctional screening device for powder metallurgy production according to claim 1, characterized in that, The screening frame (14) has a support plate fixed at the lower inner end and the upper outer end. The support plate is connected to the screening protection box (1) by an elastic telescopic rod (16). An eccentric block excitation device (15) is installed at the bottom of the support plate at the upper outer end to drive the screening frame (14) to move vertically up and down.

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