Metal powder screening device with screen convenient to replace

Abstract

The invention provides a metal powder screening device with a screen convenient to replace. Relates to the technical field of metal, in particular to a metal powder screening device with a screen convenient to replace, which comprises an annular placing plate fixedly mounted in a screening box with an open bottom, an annular connecting plate is arranged on the annular placing plate, a funnel-shaped screen is fixedly mounted in the annular connecting plate, and a protective pipe is fixedly mounted in the screening box. And a rotating motor is fixedly installed in the protective pipe, a vertical rod is fixedly installed on an output shaft of the rotating motor, a clamping opening is formed in the top end of the vertical rod, the vertical rod penetrates through the funnel-shaped screen and is slidably connected with the funnel-shaped screen, and a transverse plate is slidably installed in the screening box. The metal powder screening device with the screen convenient to replace has the advantages that use is convenient, operation is easy, aggregates are smashed, and the screening efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of metals, and particularly to a screening device for metal powder that facilitates the replacement of a screen mesh. Background Art

[0002] Metal powder refers to a group of fine metal particles, including single-metal powder, alloy powder, and certain refractory compound powders with metallic properties. It is the main raw material for powder metallurgy. Generally, elemental metals are silver-white, and when under certain conditions, they are black powders. Most metal powders are black, and metal powder is generally obtained by gas atomization powder making. After obtaining the metal powder, it cannot be directly used. Generally, workers will screen the metal powder through a screening device.

[0003] However, the existing screening devices for metal powder only have a simple screening function and cannot crush the metal powder aggregates formed by van der Waals forces and electrostatic forces. During screening, these aggregates will be misjudged as large particles and cannot pass through the screen mesh, resulting in inaccurate screening and low efficiency, with certain limitations.

[0004] Therefore, it is necessary to provide a screening device for metal powder that facilitates the replacement of a screen mesh to solve the above technical problems. Summary of the Invention

[0005] The technical problem solved by the present invention is to provide a screening device for metal powder that is convenient to use, simple to operate, can crush aggregates, and improve screening efficiency, and facilitates the replacement of a screen mesh.

[0006] To solve the above technical problems, the screening device for metal powder that facilitates the replacement of a screen mesh provided by the present invention includes an annular placement plate fixedly installed in a screening box with an open bottom. An annular connection plate is provided on the annular placement plate. A funnel-shaped screen mesh is fixedly installed inside the annular connection plate. A protective tube is fixedly installed inside the screening box. A rotating motor is fixedly installed inside the protective tube. A vertical rod is fixedly installed on the output shaft of the rotating motor. A bayonet is provided at the top of the vertical rod. The vertical rod passes through the funnel-shaped screen mesh and is slidably connected to the funnel-shaped screen mesh. A horizontal plate is slidably installed inside the screening box. A rotating rod is fixedly installed at the bottom of the horizontal plate. A plug board is fixedly installed at the bottom of the rotating rod. The bottom of the plug board extends into the bayonet and is slidably connected to the bayonet. A plurality of crushing plate knives are fixedly installed on the rotating rod. A vibration mechanism is provided inside the protective tube.

[0007] Preferably, the vibration mechanism includes two vertical plates fixedly installed in the protection tube. Cross bars are respectively rotatably installed on the two vertical plates. Second bevel gears are respectively fixedly sleeved at one ends of the two cross bars close to each other. Both of the second bevel gears are meshed with the first bevel gear fixedly sleeved on the vertical rod. Third bevel gears are respectively fixedly sleeved at the other ends of the two cross bars away from each other. Two short rods are rotatably installed in the protection tube. Fourth bevel gears are respectively fixedly sleeved on the two short rods. The two fourth bevel gears are respectively meshed with the two third bevel gears. Push circular plates are eccentrically fixedly installed at the bottom ends of the two short rods. Fixed rods are respectively fixedly installed on the inner walls of the screening box. Push plates are respectively slidably installed on the two fixed rods. Compression springs are respectively movably sleeved on the two fixed rods. One ends of the two compression springs are respectively fixedly connected to the corresponding push plates. The other ends of the two compression springs are respectively fixedly connected to circular plates fixedly installed at both ends of the two fixed rods. Connecting rods are respectively fixedly installed at one ends of the two push plates away from each other. Impact plates are respectively fixedly installed at one ends of the two connecting rods away from each other.

[0008] Preferably, through holes are respectively formed in the two push plates. Linear bearings are respectively fixedly installed in the two through holes. The two fixed rods respectively penetrate through the two linear bearings and are respectively slidably connected to the inner walls of the two linear bearings in a corresponding manner.

[0009] Preferably, two limiting holes are formed in the annular connecting plate. Two positioning columns are fixedly installed at the top of the annular placing plate. The two positioning columns respectively penetrate through the two limiting holes and are respectively slidably connected to the inner walls of the two limiting holes in a corresponding manner.

[0010] Preferably, two pull rods are fixedly installed at the top of the annular placing plate. The two pull rods both penetrate through the cross plate and are slidably connected to the cross plate in a corresponding manner.

[0011] Preferably, two limiting grooves are formed in the outer wall of the screening box. Both sides of the cross plate respectively extend into the two limiting grooves and are respectively slidably connected to the inner walls of the two limiting grooves in a corresponding manner.

[0012] Preferably, four support legs are fixedly installed on the screening box. Anti-slip pads are respectively fixedly installed at the bottoms of the four support legs.

[0013] Preferably, a rotating groove is formed at the bottom of the cross plate. The top end of the rotating rod extends into the rotating groove and is fixedly sleeved with a rotating bearing. The outer wall of the rotating bearing is fixedly connected to the inner wall of the rotating groove.

[0014] Preferably, the compression spring is a tinned spring.

[0015] Compared with the related art, the metal powder screening device provided by the present invention with convenient screen replacement has the following beneficial effects: The present invention provides a metal powder screening device with convenient screen replacement. The metal powder is poured onto the funnel-shaped screen, and the impact plate is continuously impacted by rotating the motor so that the screening box, the funnel-shaped screen and the metal powder are always in a vibrating state, thereby allowing the fine metal powder to quickly pass through the funnel-shaped screen to complete the screening operation. At the same time, the crushing plate knife is rotated to crush the agglomerated metal powder into metal powder of normal particle size, thereby improving the accuracy and efficiency of screening. When the funnel-shaped screen is damaged after long-term use and needs to be replaced, the broken funnel-shaped screen can be replaced by first moving the horizontal plate upward to drive the crushing plate knife to move upward out of the screening box, and then holding the pull rod and moving it upward, thereby moving the annular connecting plate and the funnel-shaped screen upward out of the screening box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the main structure of a metal powder screening device with convenient screen replacement provided by the present invention; Figure 2 for Figure 1 An enlarged schematic diagram of section A is shown; Figure 3 for Figure 1 An enlarged schematic diagram of portion B is shown; Figure 4 for Figure 1 An enlarged schematic diagram of section C is shown; Figure 5 for Figure 1 The assembly diagram of the insert plate, vertical rod and bayonet shown; Figure 6 for Figure 1 The assembly diagram of the funnel-shaped screen and the rotating rod shown; Figure 7 A front view of the metal powder screening device provided by the present invention with convenient screen replacement.

[0017] Numbers in the figure: 1. Screening box; 2. Annular placement plate; 3. Annular connecting plate; 4. Positioning column; 5. Funnel-shaped screen; 6. Pull rod; 7. Horizontal plate; 9. Limiting groove; 10. Rotating rod; 11. Crushing plate knife; 12. Protective tube; 13. Rotating motor; 14. Horizontal rod; 15. First bevel gear; 16. Vertical rod; 17. Insert plate; 18. Bayonet; 19. Second bevel gear; 20. Third bevel gear; 21. Fourth bevel gear; 22. Short rod; 23. Push circular plate; 24. Push plate; 25. Circular plate; 26. Compression spring; 27. Connecting rod; 28. Fixed rod; 29. Impact plate. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] Please refer to Figures 1-7 , in the present invention, a screening device for metal powder that facilitates the replacement of the screen includes an annular placement plate 2 fixedly installed in a screening box 1 with an open bottom. In order to support the device and make it more convenient for people to use the device, four support legs are fixedly installed on the screening box 1, and anti-slip pads are respectively fixedly installed at the bottoms of the four support legs. By means of the anti-slip pads, the friction between the support legs and the ground is increased, so that the device is placed more stably on the ground. An annular connection plate 3 is arranged on the annular placement plate 2, and a funnel-shaped screen 5 is fixedly installed inside the annular connection plate 3. A protection tube 12 is fixedly installed inside the screening box 1, and a rotating motor 13 is fixedly installed inside the protection tube 12. A vertical rod 16 is fixedly installed on the output shaft of the rotating motor 13, and a bayonet 18 is opened at the top end of the vertical rod 16. The vertical rod 16 passes through the funnel-shaped screen 5 and is slidably connected to the funnel-shaped screen 5. A transverse plate 7 is slidably installed inside the screening box 1. In order to limit the transverse plate 7, so that the rotating rod 10 and the crushing plate knives 11 rotate more stably inside the device, two limiting grooves 9 are opened on the outer wall of the screening box 1. The two sides of the transverse plate 7 respectively extend into the two limiting grooves 9 and are respectively slidably connected to the inner walls of the two limiting grooves 9. A rotating rod 10 is fixedly installed at the bottom of the transverse plate 7. In order to rotatably install the rotating rod 10 on the transverse plate 7, a rotating groove is opened at the bottom of the transverse plate 7. The top end of the rotating rod 10 extends into the rotating groove and is fixedly sleeved with a rotating bearing, and the outer wall of the rotating bearing is fixedly connected to the inner wall of the rotating groove. By means of the rotating bearing, the rotating rod 10 rotates more stably on the transverse plate 7. An insertion plate 17 is fixedly installed at the bottom end of the rotating rod 10, and the bottom of the insertion plate 17 extends into the bayonet 18 and is slidably connected to the bayonet 18. A plurality of crushing plate knives 11 are fixedly installed on the rotating rod 10, and a vibration mechanism is arranged inside the protection tube 12.

[0020] In order to keep the screening box 1, the funnel-shaped screen 5 and the metal powder in a vibrating state all the time, so that the fine metal powder can quickly pass through the funnel-shaped screen 5 to complete the screening operation, the vibration mechanism includes two vertical plates fixedly installed in the protective tube 12. Cross bars 14 are rotatably installed on the two vertical plates respectively. Second bevel gears 19 are fixedly sleeved on the ends of the two cross bars 14 close to each other respectively. And the two second bevel gears 19 are both meshed with the first bevel gear 15 fixedly sleeved on the vertical rod 16. Third bevel gears 20 are fixedly sleeved on the ends of the two cross bars 14 away from each other respectively. Two short rods 22 are rotatably installed in the protective tube 12. Fourth bevel gears 21 are fixedly sleeved on the two short rods 22 respectively. And the two fourth bevel gears 21 are respectively meshed with the two third bevel gears 20. Push round plates 23 are eccentrically fixedly installed at the bottom ends of the two short rods 22 respectively. Fixed rods 28 are fixedly installed on the inner walls of the screening box 1 respectively. In order to reduce the friction between the connecting rod 27 and the push plate 24, thereby reducing the wear degree of the connecting rod 27 and improving the service life of the connecting rod 27, through holes are respectively opened on the two push plates 24. Linear bearings are fixedly installed in the two through holes respectively. The two fixed rods 28 respectively penetrate through the two linear bearings and are respectively slidably connected with the inner walls of the two linear bearings in a corresponding manner. Push plates 24 are slidably installed on the two fixed rods 28 respectively. Compression springs 26 are movably sleeved on the two fixed rods 28 respectively. In order to improve the service life of the compression springs 26, the compression springs 26 are tin-plated springs. And one ends of the two compression springs 26 are respectively fixedly connected with the two push plates 24 correspondingly. The other ends of the two compression springs 26 are respectively fixedly connected with the circular plates 25 fixedly installed at both ends of the two fixed rods 28 correspondingly. Connecting rods 27 are fixedly installed on the ends of the two push plates 24 away from each other respectively. Impact plates 29 are fixedly installed on the ends of the two connecting rods 27 away from each other respectively.

[0021] In order to limit the annular connecting plate 3 and the funnel-shaped screen 5, so that the annular connecting plate 3 and the funnel-shaped screen 5 are always stably installed on the annular placing plate 2, two limiting holes are opened on the annular connecting plate 3. Two positioning columns 4 are fixedly installed on the top of the annular placing plate 2. And the two positioning columns 4 respectively penetrate through the two limiting holes and are respectively slidably connected with the inner walls of the two limiting holes in a corresponding manner.

[0022] In order to facilitate people to more conveniently disassemble the funnel-shaped screen 5 from the device for replacement, two pull rods 6 are fixedly installed on the top of the annular placing plate 2. And the two pull rods 6 both penetrate through the cross plate 7 and are slidably connected with the cross plate 7 in a corresponding manner.

[0023] The working principle of the screening device for metal powder that facilitates screen replacement provided by the present invention is as follows: In the initial state, the compression spring 26 is in a compressed state, and the impact plate 29 is in close contact with the screening box 1. When it is necessary to use this device to screen metal powder, the metal powder is poured onto the funnel-shaped screen 5. The rotation motor 13 is started, and the rotation of the rotation motor 13 drives the vertical rod 16 to rotate. The rotation of the vertical rod 16 drives the first bevel gear 15 to rotate. The rotation of the first bevel gear 15 drives the short rod 22 to rotate through the second bevel gear 19, the cross bar 14, the third bevel gear 20, and the fourth bevel gear 21. In the first half of the rotation period of the short rod 22, it drives the pushing circular plate 23 to contact the pushing plate 24 and moves the pushing plate 24. The movement of the pushing plate 24 separates the impact plate 29 from the screening box 1 and compresses the compression spring 26 more severely. When the short rod 22 rotates for half a period, the pushing circular plate 23 no longer contacts the pushing plate 24. At this moment, the compression spring 26 needs to return to its original shape and pushes the pushing plate 24 to move, ultimately causing the impact plate 29 to impact the screening box 1. In this way, by rotating the rotation motor 13, the impact plate 29 continuously impacts the screening box 1, making the screening box 1, the funnel-shaped screen 5, and the metal powder always in a vibrating state, so that the fine metal powder quickly passes through the funnel-shaped screen 5 to complete the screening operation. At the same time, the rotation of the vertical rod 16 drives the insertion plate 17 to rotate, the rotation of the insertion plate 17 drives the rotating rod 10 to rotate, and the rotation of the rotating rod 10 drives the crushing plate knife 11 to rotate to crush the agglomerated metal powder into metal powder with a normal particle size, thereby improving the accuracy and efficiency of screening. When the funnel-shaped screen 5 is damaged after long-term use and needs to be replaced, first move the cross plate 7 upward to drive the crushing plate knife 11 to move out of the screening box 1. Then the worker holds the pull rod 6 and moves upward, and then moves the annular connection plate 3 and the funnel-shaped screen 5 upward out of the screening box 1, and the replacement of the damaged funnel-shaped screen 5 can be completed.

[0024] Compared with the related technology, the screening device for metal powder that facilitates screen replacement provided by the present invention has the following beneficial effects: The present invention provides a screening device for metal powder that facilitates screen replacement. The metal powder is poured onto the funnel-shaped screen 5. By rotating the rotation motor 13, the impact plate 29 continuously impacts the screening box 1, making the screening box 1, the funnel-shaped screen 5, and the metal powder always in a vibrating state, so that the fine metal powder quickly passes through the funnel-shaped screen 5 to complete the screening operation. At the same time, the crushing plate knife 11 rotates to crush the agglomerated metal powder into metal powder with a normal particle size, thereby improving the accuracy and efficiency of screening. When the funnel-shaped screen 5 is damaged after long-term use and needs to be replaced, by first moving the cross plate 7 upward to drive the crushing plate knife 11 to move out of the screening box 1, and then holding the pull rod 6 and moving upward, and then moving the annular connection plate 3 and the funnel-shaped screen 5 upward out of the screening box 1, the replacement of the damaged funnel-shaped screen 5 can be completed.

[0025] The above are only embodiments of the present invention, and do not thus limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. A screening device for metal powder that facilitates screen replacement, comprising an annular placement plate (2) fixedly installed in a screening box (1) with an open bottom, characterized in that: An annular placement plate (2) is provided with an annular connection plate (3). A funnel-shaped screen (5) is fixedly installed inside the annular connection plate (3). A protective tube (12) is fixedly installed inside the screening box (1). A rotating motor (13) is fixedly installed inside the protective tube (12). A vertical rod (16) is fixedly installed on the output shaft of the rotating motor (13). A bayonet (18) is formed at the top end of the vertical rod (16). The vertical rod (16) penetrates through the funnel-shaped screen (5) and is slidably connected to the funnel-shaped screen (5). A cross plate (7) is slidably installed inside the screening box (1). A rotating rod (10) is fixedly installed at the bottom of the cross plate (7). A plug board (17) is fixedly installed at the bottom end of the rotating rod (10). The bottom end of the plug board (17) extends into the bayonet (18) and is slidably connected to the bayonet (18). A plurality of crushing plate knives (11) are fixedly installed on the rotating rod (10). A vibration mechanism is arranged inside the protective tube (12).

2. The screening device for metal powder that facilitates screen replacement according to claim 1, wherein The vibration mechanism includes two vertical plates fixedly installed inside the protective tube (12). A cross rod (14) is rotatably installed on each of the two vertical plates. Second bevel gears (19) are fixedly sleeved on the ends of the two cross rods (14) close to each other. Both of the second bevel gears (19) are meshed with a first bevel gear (15) fixedly sleeved on the vertical rod (16). Third bevel gears (20) are fixedly sleeved on the ends of the two cross rods (14) away from each other. Two short rods (22) are rotatably installed inside the protective tube (12). Fourth bevel gears (21) are fixedly sleeved on the two short rods (22). The two fourth bevel gears (21) are respectively meshed with the two third bevel gears (20). Push round plates (23) are eccentrically fixedly installed at the bottom ends of the two short rods (22). Fixed rods (28) are fixedly installed on the inner walls of the screening box (1). Push plates (24) are slidably installed on the two fixed rods (28). Compression springs (26) are movably sleeved on the two fixed rods (28). One ends of the two compression springs (26) are respectively fixedly connected to the corresponding push plates (24). The other ends of the two compression springs (26) are respectively fixedly connected to circular plates (25) fixedly installed at the two ends of the two fixed rods (28). Connecting rods (27) are fixedly installed at the ends of the two push plates (24) away from each other. Impact plates (29) are fixedly installed at the ends of the two connecting rods (27) away from each other.

3. The screening device for metal powder that facilitates screen replacement according to claim 2, wherein Through holes are formed in the two push plates (24). Linear bearings are fixedly installed in the two through holes. The two fixed rods (27) respectively penetrate through the two linear bearings and are respectively slidably connected to the inner walls of the two linear bearings.

4. A screening device for metal powder that facilitates screen replacement according to claim 3, characterized in that, Two limiting holes are formed in the annular connecting plate (3). Two positioning columns (4) are fixedly installed at the top of the annular placing plate (2), and the two positioning columns (4) respectively penetrate through the two limiting holes and are respectively slidably connected with the inner walls of the two limiting holes in a corresponding manner.

5. The screening device for metal powder that facilitates screen replacement according to claim 4, characterized in that, Two pull rods (6) are fixedly installed at the top of the annular placing plate (2), and the two pull rods (6) penetrate through the cross plate (7) and are respectively slidably connected with the cross plate (7) in a corresponding manner.

6. The screening device for metal powder that facilitates screen replacement according to claim 5, wherein, Two limiting grooves (9) are formed in the outer wall of the screening box (1). Two sides of the cross plate (7) respectively extend into the two limiting grooves (9) and are respectively slidably connected with the inner walls of the two limiting grooves (9) in a corresponding manner.

7. A screening device for metal powder that facilitates screen replacement according to claim 6, characterized in that, Four support legs are fixedly installed on the screening box (1), and anti-slip pads are respectively fixedly installed at the bottoms of the four support legs.

8. A screening device for metal powder that facilitates screen replacement according to claim 7, characterized in that, A rotating groove is formed at the bottom of the cross plate (7). The top end of the rotating rod (10) extends into the rotating groove and is fixedly sleeved with a rotating bearing, and the outer wall of the rotating bearing is fixedly connected with the inner wall of the rotating groove.

9. A screening device for metal powder that facilitates screen replacement according to claim 8, characterized in that, The compression spring (26) is a tinned spring.

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