Metal powder filtering device

Abstract

The invention relates to the technical field of filtering devices, and discloses a metal powder filtering device which comprises a shell, a top cover and a sieve tray, the top cover is fixedly installed at the upper end of the shell, the sieve tray is arranged in the shell and can vertically vibrate in the shell and rotate intermittently in a one-way mode, a driving mechanism is arranged in the shell, and the driving mechanism drives the shell to rotate in a one-way mode. The driving mechanism comprises a main shaft, a driving assembly and a deflection assembly; the main shaft is fixedly mounted at the lower end of the sieve tray; according to the metal powder filtering device, the driving mechanism is arranged to drive the screening disc to achieve the cooperative action of vertical vibration and one-way rotation, the problems that in an existing device, materials are prone to being locally accumulated, and the screening efficiency and precision are limited are effectively solved, and meanwhile through the cooperation of the feeding barrel and the material blocking barrel, the screening efficiency is improved through the intermittent rotation function of the screening disc; intermittent feeding matched with the screening action is achieved, incomplete screening caused by overloading of the screen surface is avoided, an independently-driven quantitative feeding structure does not need to be additionally arranged, and the equipment cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] This invention relates to the field of filtration device technology, specifically a metal powder filtration device. Background Technology

[0002] Metal powder is a core raw material in powder metallurgy, additive manufacturing, precision machining, and other fields. Its particle size uniformity directly affects the density, molding accuracy, and mechanical properties of the finished product. Filtration and sieving, as a key step in the pretreatment of metal powder, is used to remove agglomerates, large particles, and foreign matter, ensuring that the powder meets process requirements. Traditional vibrating screening equipment often uses single reciprocating vibration or rotary screening, which can easily lead to problems such as uneven distribution of metal powder, screen clogging, and incomplete screening.

[0003] Chinese patent CN115193693B discloses a metal powder sieving device, which stirs metal powder with a stirring rod, pushes the powder on the sieve plate with a scraper, and uses a vibration unit to vibrate the sieve plate to reduce powder accumulation and alleviate the problem of sieve hole clogging.

[0004] In the aforementioned device, the screening plate relies solely on external vibration and scraper to prevent clogging. Metal powder is prone to localized accumulation on the screening plate, resulting in limited screening efficiency and accuracy. Furthermore, the device lacks a quantitative feeding structure, which can easily lead to overfeeding, causing screen overload and incomplete screening. In existing technologies, the quantitative feeding structure is usually independently set up, requiring additional driving power. This not only increases the manufacturing cost and energy consumption of the equipment but also makes the equipment structure more complex, significantly increasing the difficulty of later maintenance. In addition, the aforementioned device lacks a structure for discharging large particles, requiring periodic shutdowns for material discharge, making it impossible for the device to operate continuously for extended periods. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a metal powder filtration device that features coordinated vibration and unidirectional intermittent rotation, intermittent feeding, and synchronous slag discharge, thus solving the problems mentioned in the background section.

[0006] (II) Technical Solution To solve the above-mentioned technical problems, the present invention provides the following technical solution: A metal powder filtering device includes a housing, a top cover, and a sieve disc. The top cover is fixedly installed on the upper end of the housing. The sieve disc is disposed inside the housing and can vertically vibrate and intermittently rotate in one direction within the housing. A drive mechanism is provided inside the housing. The drive mechanism includes a main shaft, a drive assembly, and a deflection assembly. The main shaft is fixedly installed on the lower end of the sieve disc. The drive assembly drives the main shaft to move up and down to vibrate the sieve disc. The deflection assembly drives the main shaft to rotate intermittently in one direction while it vibrates, thereby causing the sieve disc to rotate in one direction. A feed cylinder is fixedly installed on the top cover. A discharge port is provided on the side of the lower end of the feed cylinder. A baffle cylinder is fixedly installed on the upper end of the sieve disc. The baffle cylinder is sleeved outside the feed cylinder, and a discharge port is opened on the side wall of the baffle cylinder. When the sieve disc rotates to the point where the discharge port and the discharge port are in relative communication, the material inside the feed cylinder can be discharged onto the sieve disc through the discharge port and the discharge port.

[0007] Preferably, the drive assembly includes a mounting bracket, a drive shaft, a cam, a turntable, and a spline tube. The two ends of the mounting bracket are fixedly connected to the two sides of the housing. The drive shaft is horizontally rotatably mounted on the mounting bracket. The cam is fixedly mounted on the drive shaft. The turntable is fixedly mounted on the lower end of the main shaft, and the lower end of the turntable abuts against the cam. The spline tube passes through the mounting bracket and is rotatably connected to the mounting bracket. The main shaft is slidably mounted inside the spline tube.

[0008] Preferably, the deflection assembly includes a helical toothed ring, a vertical plate, a helical rack, and a one-way transmission assembly. The helical toothed ring is sleeved on the main shaft and is connected to the main shaft in one-way transmission through the one-way transmission assembly. The vertical plate is fixedly installed on the mounting bracket, and the helical rack is fixedly installed on one side wall of the vertical plate, and the helical rack is adapted to mesh with the helical toothed ring.

[0009] Preferably, the one-way transmission assembly includes a rotating block, a sliding groove, a one-way slider, a return spring, and a one-way slot. The rotating block is fixedly mounted on the main shaft. The sliding groove is formed on the outer side wall of the rotating block. The one-way slider is slidably mounted inside the sliding groove. The two ends of the return spring are fixedly connected to the sliding groove and the one-way slider, respectively. The one-way slot is formed in a circumferential array on the inner side wall of the helical gear ring, and the one-way slot is adapted to engage with the one-way slider. When the helical gear ring rotates in the forward direction, the one-way slot engages with the one-way slider, causing the main shaft to rotate synchronously with the helical gear ring. When the helical gear ring rotates in the reverse direction, the one-way slot squeezes the one-way slider to slide into the sliding groove, so that the main shaft does not rotate with the helical gear ring.

[0010] Preferably, the one-way transmission assembly further includes a ratchet, a limiting block, and a limiting spring. The ratchet is fixedly mounted on the main shaft, and the limiting block is horizontally slidably mounted on one side wall of the vertical plate, and the limiting block is adapted to engage with the ratchet. The two ends of the limiting spring are fixedly connected to the limiting block and the vertical plate, respectively. When the helical gear ring rotates in the forward direction, driving the main shaft to rotate, the ratchet rotates and squeezes the limiting block, causing the limiting spring to contract, so that the main shaft rotates with the helical gear ring without obstruction. When the helical gear ring rotates in the reverse direction, the limiting block engages with the ratchet, preventing the main shaft from rotating with the helical gear ring.

[0011] Preferably, the drive assembly further includes a drive motor, which is fixedly mounted on the vertical plate, and the drive end of the drive motor is connected to the drive shaft via a gear transmission pair.

[0012] Preferably, the height of the discharge port is greater than the height of the discharge port, and the width of the discharge port is less than the width of the discharge port. The lower end of the discharge port extends to the inner bottom wall of the baffle cylinder. A rotating cylinder is rotatably connected to the bottom of the feed cylinder. A blade is fixedly installed on the upper end of the rotating cylinder, and the lower end of the rotating cylinder extends through the feed cylinder to the bottom of the feed cylinder. A connecting rod is fixedly installed inside the baffle cylinder. The upper end of the connecting rod is inserted into the inside of the rotating cylinder, and the connecting rod is slidably adapted to the rotating cylinder.

[0013] Preferably, a slag discharge ring is provided below the outer side of the screen plate. The slag discharge ring is vertically and slidably connected to the inner side wall of the shell, and is rotatably connected to the lower surface of the screen plate. A support spring is fixedly installed between the lower surface of the slag discharge ring and the upper surface of the mounting frame. A slag discharge channel is provided at one end of the slag discharge ring. A slag discharge port is installed on one side wall of the shell. The outlet end of the slag discharge channel extends to the inside of the slag discharge port. A discharge pipe is installed at the bottom of the shell, and the discharge pipe is located below the screen plate.

[0014] Preferably, the mounting frame is provided with a net clearing mechanism, which includes a horizontal shaft, an elastic rod, and a bob. The horizontal shaft is horizontally rotatably mounted on the mounting frame, the elastic rod is fixedly mounted on the horizontal shaft, and the bob is fixedly mounted on the end of the elastic rod.

[0015] Preferably, the net cleaning mechanism further includes a transmission rod that passes through the mounting frame and is rotatably connected to the mounting frame. The upper end of the transmission rod is connected to the horizontal shaft via a bevel gear transmission pair, and the lower end of the transmission rod is connected to the drive shaft via a bevel gear transmission pair.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a metal powder filtration device, which has the following beneficial effects: 1. This metal powder filtration device, through the setting of a drive mechanism to drive the screen disc to achieve coordinated vertical vibration and unidirectional rotation, effectively solves the problems of material easy local accumulation and limited screening efficiency and accuracy in existing devices. At the same time, with the cooperation structure of the feed cylinder and the baffle cylinder, the intermittent rotation function of the screen disc is used to achieve intermittent feeding that matches the screening action, avoiding incomplete screening caused by screen overload. There is no need to set up an additional independent driven quantitative feeding structure, reducing equipment cost and maintenance difficulty.

[0017] 2. This metal powder filtration device, through the setting of a unidirectional transmission structure, can precisely control the screen disc to rotate at a fixed angle only during the upward vibration. During the downward movement, the unidirectional locking action prevents the screen disc from reversing. This allows the material to be dispersed by vibration and then slowly and orderly gather towards the edge of the screen disc with the unidirectional intermittent rotation of the screen disc. This not only further improves the uniformity and efficiency of screening, but also effectively avoids the problem of incomplete screening caused by the continuous rotation of the screen disc, which causes the material to be quickly thrown to the edge of the screen disc and discharged before being fully screened. This ensures stable screening quality.

[0018] 3. This metal powder filtration device, by incorporating a discharge ring that vibrates synchronously with the screen body, can promptly receive and collect coarse particles that move to the edge of the screen. Simultaneously, the vibration force pushes the coarse particles towards the discharge channel, ensuring smooth discharge and preventing their accumulation inside the screen that could affect screening operations. Furthermore, a screen cleaning mechanism utilizes a rotating horizontal shaft to intermittently impact the bottom of the screen. The resulting vibration force dislodges fine powder clogging the screen holes, effectively alleviating screen blockage, reducing the frequency of manual screen cleaning, lowering maintenance workload, and significantly improving the stability and reliability of continuous equipment operation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the metal powder filtration device of the present invention; Figure 2 This is a front structural cross-sectional view of the metal powder filtration device of the present invention; Figure 3 This is one of the three-dimensional structural cross-sectional views of the metal powder filtration device of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the local structure at point A; Figure 5 This is a partial structural cross-sectional view of the metal powder filtration device of the present invention; Figure 6 This is a second three-dimensional structural cross-sectional view of the metal powder filtration device of the present invention; Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the local structure at point B; Figure 8 For the present invention Figure 6 Enlarged schematic diagram of the local structure at point C; Figure 9 For the present invention Figure 6 Enlarged schematic diagram of the local structure at point D; Figure 10 For the present invention Figure 6 A magnified view of the local structure at point E in the middle; Figure 11 For the present invention Figure 6 Enlarged schematic diagram of the local structure at point F; Figure 12 This is the third three-dimensional structural schematic diagram of the metal powder filtration device of the present invention.

[0020] In the picture: 1. Shell; 11. Slag discharge port; 12. Discharge pipe; 2. Top cover; 21. Feed cylinder; 22. Discharge port; 23. Rotary drum; 24. Blade; 3. Screen plate; 31. Baffle cylinder; 32. Discharge port; 33. Connecting rod; 4. Main shaft; 5. Drive assembly; 51. Mounting bracket; 52. Drive shaft; 53. Cam; 54. Turntable; 55. Spline tube; 56. Drive motor; 6. Deflection assembly; 61. Helical gear ring; 62. Vertical plate; 63. Helical rack; 64. One-way transmission assembly; 641. Rotating block; 642. Slide groove; 643. One-way slider; 644. Return spring; 645. One-way slot; 646. Ratchet; 647. Limiting block; 648. Limiting spring; 7. Slag discharge ring; 71. Support spring; 72. Slag discharge channel; 8. Screen cleaning mechanism; 81. Horizontal shaft; 82. Elastic rod; 83. Ball; 84. Transmission rod. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 12This invention provides a metal powder filtering device, including a housing 1, a top cover 2, and a sieve disc 3. The top cover 2 is fixedly installed on the upper end of the housing 1. The sieve disc 3 is disposed inside the housing 1 and can vertically vibrate and unidirectionally rotate intermittently inside the housing 1. A driving mechanism is provided inside the housing 1, which includes a main shaft 4, a driving assembly 5, and a deflection assembly 6. The main shaft 4 is fixedly installed on the lower end of the sieve disc 3. The driving assembly 5 is used to drive the main shaft 4 to move up and down to make the sieve disc 3 vibrate. The deflection assembly 6 is used to deflect the main shaft 4. The vibration drives the main shaft 4 to rotate intermittently in one direction, which in turn drives the screen plate 3 to rotate in one direction. A feed cylinder 21 is fixedly installed on the top cover 2. A discharge port 22 is provided on the side of the lower end of the feed cylinder 21. A baffle cylinder 31 is fixedly installed on the upper end of the screen plate 3. The baffle cylinder 31 is sleeved on the outside of the feed cylinder 21, and a discharge port 32 is opened on the side wall of the baffle cylinder 31. When the screen plate 3 rotates to the point where the discharge port 32 is in relative communication with the discharge port 22, the material inside the feed cylinder 21 can be discharged onto the screen plate 3 through the discharge port 22 and the discharge port 32.

[0023] As can be seen from the above, the main closed structure of the filter device is formed by the shell 1 and the top cover 2. The screen plate 3, as the core screening component, is driven by the drive mechanism composed of the main shaft 4, the drive component 5 and the deflection component 6. It simultaneously realizes vertical vibration and unidirectional intermittent rotation. The vibration disperses the metal powder and improves the screening efficiency, while the unidirectional intermittent rotation avoids local accumulation of materials. At the same time, by utilizing the alignment and cooperation of the feed port 22 of the feed cylinder 21 and the discharge port 32 of the baffle cylinder 31, the material is fed only when the screen plate 3 rotates to a specific angle. This achieves intermittent quantitative feeding that is synchronized with the screening action, without the need for an additional independent feeding drive, thus avoiding overload of the screen plate 3 and incomplete screening.

[0024] The drive assembly 5 includes a mounting bracket 51, a drive shaft 52, a cam 53, a turntable 54, and a spline tube 55. The two ends of the mounting bracket 51 are fixedly connected to the two sides of the housing 1. The drive shaft 52 is horizontally rotatably mounted on the mounting bracket 51. The cam 53 is fixedly mounted on the drive shaft 52. The turntable 54 is fixedly mounted on the lower end of the main shaft 4, and the lower end of the turntable 54 abuts against the cam 53. The spline tube 55 passes through the mounting bracket 51 and is rotatably connected to the mounting bracket 51. The main shaft 4 is slidably mounted inside the spline tube 55.

[0025] As can be seen from the above, the mounting bracket 51 provides stable mounting support for the drive shaft 52 and the spline tube 55. The drive shaft 52 drives the cam 53 to rotate. The cam 53 drives the main shaft 4 and the screen plate 3 to perform periodic vertical vibration through the abutment cooperation with the turntable 54. The spline tube 55 not only plays a radial limiting and guiding role for the main shaft 4, ensuring that the main shaft 4 can slide smoothly up and down, but also transmits circumferential torque, ensuring that the main shaft 4 can achieve unidirectional intermittent rotation with the deflection component 6. In addition, in this embodiment, a dustproof protective cover is also provided on the lower surface of the mounting bracket 51 to protect the drive shaft 52, cam 53 and turntable 54 and other structures inside, so as to prevent metal powder from falling into the gaps of the structure and causing obstruction to the operation of the structure. At the same time, the connection position between the spline tube 55 and the mounting bracket 51, and the connection position between the spline tube 55 and the main shaft 4 should also be provided with a dustproof sealing structure. The dustproof sealing structure in the prior art, such as labyrinth seal, lip seal ring, and mechanical seal, can solve the problem of metal powder mixing into the connection gap, which will not be elaborated in this embodiment.

[0026] When using this device, the drive component 5 drives the screen plate 3 to vibrate vertically continuously, and the deflection component 6, in conjunction with the vibration action, drives the screen plate 3 to rotate intermittently in one direction. During the rotation of the screen plate 3, the discharge port 32 of the baffle cylinder 31 and the discharge port 22 of the feed cylinder 21 are intermittently aligned and connected to achieve quantitative intermittent feeding. The metal powder falls onto the screen plate 3 and is uniformly screened under the combined action of vibration and rotation.

[0027] Example 2 like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Figure 9 As shown, the difference between this embodiment and the above embodiment is that the deflection assembly 6 includes a helical gear ring 61, a vertical plate 62, a helical rack 63, and a one-way transmission assembly 64. The helical gear ring 61 is sleeved on the main shaft 4, and the helical gear ring 61 is connected to the main shaft 4 in one-way transmission through the one-way transmission assembly 64. The vertical plate 62 is fixedly installed on the mounting bracket 51, and the helical rack 63 is fixedly installed on one side wall of the vertical plate 62, and the helical rack 63 is adapted to mesh with the helical gear ring 61.

[0028] As can be seen from the above, the vertical plate 62 provides fixed support for the helical rack 63. When the main shaft 4 drives the helical ring 61 to vibrate up and down, the helical ring 61 meshes with the fixed helical rack 63 to generate a circumferential deflection force, which drives the helical ring 61 to rotate. The helical ring 61 then transmits the rotation unidirectionally to the main shaft 4 through the one-way transmission assembly 64, realizing the one-way intermittent rotation of the screen plate 3. In addition, in this embodiment, the vertical plate 62 also serves as a rotatable connection to the drive shaft 52. Since the vertical plate 62 is fixedly installed on the mounting frame 51, when the drive shaft 52 is rotatably connected to the vertical plate 62, the drive shaft 52 can be horizontally rotatably installed on the mounting frame 51.

[0029] The one-way transmission assembly 64 includes a rotating block 641, a sliding groove 642, a one-way slider 643, a return spring 644, and a one-way slot 645. The rotating block 641 is fixedly mounted on the main shaft 4. The sliding groove 642 is formed on the outer wall of the rotating block 641. The one-way slider 643 is slidably mounted inside the sliding groove 642. The two ends of the return spring 644 are fixedly connected to the sliding groove 642 and the one-way slider 643, respectively. The one-way slot 645 is formed in a circumferential array on the inner wall of the helical gear ring 61, and the one-way slot 645 is adapted to engage with the one-way slider 643. When the helical gear ring 61 rotates in the forward direction, the one-way slot 645 engages with the one-way slider 643, so that the main shaft 4 rotates synchronously with the helical gear ring 61. When the helical gear ring 61 rotates in the reverse direction, the one-way slot 645 squeezes the one-way slider 643 to slide into the sliding groove 642, so that the main shaft 4 does not rotate with the helical gear ring 61.

[0030] As can be seen from the above, the rotating block 641 moves synchronously with the main shaft 4, the slide groove 642 provides sliding space for the one-way slider 643, and the return spring 644 provides an outward pushing force for the one-way slider 643. When the helical tooth ring 61 rotates in the forward direction, the one-way slider 643 engages with the one-way slot 645 to achieve synchronous rotation of the helical tooth ring 61 and the main shaft 4. When the helical tooth ring 61 rotates in the reverse direction, the one-way slider 643 is squeezed and compressed back into the slide groove 642, cutting off the power transmission and ensuring that the main shaft 4 rotates only in one direction.

[0031] The one-way transmission assembly 64 also includes a ratchet 646, a limiting block 647, and a limiting spring 648. The ratchet 646 is fixedly mounted on the main shaft 4. The limiting block 647 is horizontally slidably mounted on one side wall of the vertical plate 62, and the limiting block 647 is adapted to engage with the ratchet 646. The two ends of the limiting spring 648 are fixedly connected to the limiting block 647 and the vertical plate 62, respectively. When the helical gear ring 61 rotates in the forward direction and drives the main shaft 4 to rotate, the ratchet 646 rotates and squeezes the limiting block 647, causing the limiting spring 648 to contract, so that the main shaft 4 can rotate with the helical gear ring 61 without obstruction. When the helical gear ring 61 rotates in the reverse direction, the limiting block 647 engages with the ratchet 646, preventing the main shaft 4 from rotating with the helical gear ring 61.

[0032] As can be seen from the above, the ratchet 646 rotates synchronously with the main shaft 4, and the limiting spring 648 provides a clamping force for the limiting block 647. When the main shaft 4 rotates in the forward direction, the ratchet 646 can smoothly pass the limiting block 647. When the main shaft 4 has a tendency to reverse, the limiting block 647 engages with the ratchet 646 to lock it, further enhancing the unidirectional rotation effect and preventing the main shaft 4 from being affected by friction and rotating in reverse with the helical gear ring 61.

[0033] The drive assembly 5 also includes a drive motor 56, which is fixedly mounted on the vertical plate 62, and the drive end of the drive motor 56 is connected to the drive shaft 52 through a gear transmission pair.

[0034] As can be seen from the above, the drive motor 56 provides power to the entire device, and transmits the power stably to the drive shaft 52 through the gear transmission pair, thereby driving the cam 53 to rotate and realize the vibration action of the screen plate 3.

[0035] Example 3 like Figure 3 , Figure 7 and Figure 10 As shown, the difference between this embodiment and the above embodiment is that the height of the discharge port 32 is greater than the height of the discharge port 22, and the width of the discharge port 32 is less than the width of the discharge port 22. The lower end of the discharge port 32 extends to the inner bottom wall of the baffle cylinder 31. The bottom of the feed cylinder 21 is rotatably connected to the rotating cylinder 23. The upper end of the rotating cylinder 23 is fixedly installed with blades 24, and the lower end of the rotating cylinder 23 extends through the feed cylinder 21 to the bottom of the feed cylinder 21. A connecting rod 33 is fixedly installed inside the baffle cylinder 31. The upper end of the connecting rod 33 is inserted into the inside of the rotating cylinder 23, and the connecting rod 33 and the rotating cylinder 23 are slidably adapted to each other.

[0036] As can be seen from the above, the size matching of the discharge port 32 and the feed port 22 ensures that the screen plate 3 can still stably align and feed materials when it vibrates up and down, avoiding material leakage. The discharge port 32 extends to the bottom wall of the baffle cylinder 31 to ensure that the material can be completely discharged after falling into the baffle cylinder 31 and will not accumulate in the baffle cylinder 31. When the baffle cylinder 31 rotates with the screen plate 3, the connecting rod 33 drives the rotating drum 23 and the blades 24 to rotate. The blades 24 stir and loosen the metal powder in the feed cylinder 21 to prevent the powder from agglomerating and clogging the feed port 22. The connecting rod 33 and the rotating drum 23 slide and adapt to each other, without affecting the vertical vibration of the screen plate 3.

[0037] A slag discharge ring 7 is provided on the lower outer side of the screen plate 3. The slag discharge ring 7 is vertically and slidably connected to the inner side wall of the shell 1, and the slag discharge ring 7 is rotatably connected to the lower surface of the screen plate 3. A support spring 71 is fixedly installed between the lower surface of the slag discharge ring 7 and the upper surface of the mounting bracket 51. A slag discharge channel 72 is provided at one end of the slag discharge ring 7. A slag discharge port 11 is installed on one side wall of the shell 1. The outlet end of the slag discharge channel 72 extends to the inner side of the slag discharge port 11. A discharge pipe 12 is installed at the bottom of the shell 1, and the discharge pipe 12 is located below the screen plate 3.

[0038] As can be seen from the above, the slag discharge ring 7 vibrates vertically synchronously with the screen plate 3 without interfering with the rotation of the screen plate 3. The support spring 71 provides elastic support for the slag discharge ring 7, enhancing the vibration slag discharge effect. Coarse particles of impurities at the edge of the screen plate 3 fall into the slag discharge ring 7 and are discharged from the shell 1 along the slag discharge channel 72 and the slag discharge port 11 under the action of vibration. The qualified metal powder after screening falls into the bottom of the shell 1 through the screen plate 3 and is discharged through the discharge pipe 12, realizing the synchronous separation and discharge of qualified powder and coarse slag. The device can operate continuously without interruption. In addition, in this embodiment, in order to improve the slag discharge effect of the slag discharge ring 7, the inner bottom surface of the slag discharge ring 7 can be set to have a small inclination angle. The inclined plane has a minimum position at the entrance of the slag discharge channel 72, which allows the material to move faster into the slag discharge channel 72 during the vertical vibration of the slag discharge ring 7. In this example, the outer edge of the upper surface of the screen plate 3 is provided with a discharge port. When the material moves to the outer edge of the upper surface of the screen plate 3, it can be discharged from the discharge port and fall into the interior of the slag discharge ring 7. The slag discharge ring 7 is a ring structure with a U-shaped cross section. The upper inner side of the ring structure is provided with an inclined part and a horizontal part. The horizontal part rotates with the lower surface of the screen plate 3, and the inclined part is opposite to the outer edge of the screen plate 3. When the material falls from the outer edge of the screen plate 3, it will roll from the inclined part to the inner bottom of the slag discharge ring 7.

[0039] Example 4 like Figure 11 and Figure 12 As shown, the difference between this embodiment and the above embodiment is that a net clearing mechanism 8 is provided on the mounting frame 51. The net clearing mechanism 8 includes a horizontal shaft 81, an elastic rod 82 and a bouncing ball 83. The horizontal shaft 81 is horizontally rotatably mounted on the mounting frame 51, the elastic rod 82 is fixedly mounted on the horizontal shaft 81, and the bouncing ball 83 is fixedly mounted on the end of the elastic rod 82.

[0040] As can be seen from the above, when the horizontal shaft 81 rotates, it drives the elastic rod 82 and the ball 83 to make circular motion. The ball 83 intermittently hits the bottom of the screen plate 3. The elastic rod 82 provides elastic buffer to avoid rigid impact damage to the screen plate 3. The vibration generated by the impact shakes off the metal powder blocked in the screen holes of the screen plate 3, realizing automatic screen cleaning and preventing the screen holes from being blocked and affecting the screening efficiency. In addition, in this embodiment, a dustproof sealing cover is also provided on the upper surface of the mounting frame 51. The horizontal shaft 81 is located inside the dustproof sealing cover, and the two ends of the horizontal shaft 81 are rotatably connected to the dustproof sealing cover through dustproof rings.

[0041] The net cleaning mechanism 8 also includes a transmission rod 84, which passes through the mounting frame 51 and is rotatably connected to the mounting frame 51. The upper end of the transmission rod 84 is connected to the horizontal shaft 81 through a bevel gear transmission pair, and the lower end of the transmission rod 84 is connected to the drive shaft 52 through a bevel gear transmission pair.

[0042] As can be seen from the above, the transmission rod 84 transmits the power of the drive shaft 52 to the horizontal shaft 81 through two sets of bevel gear transmission pairs, so that the operation of the screen cleaning mechanism 8 does not require an additional screen cleaning drive, and at the same time ensures that the screen cleaning action and the screening action are carried out synchronously, improving the timeliness and effectiveness of screen cleaning; in this embodiment, the part of the transmission rod 84 at the upper end of the mounting frame 51 extends into the interior of the dustproof sealing cover and is protected along with the horizontal shaft 81, while the part of the transmission rod 84 at the lower end of the mounting frame 51 extends into the interior of the dustproof protective cover and is protected along with the drive shaft 52.

[0043] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal powder filtering device, comprising a housing (1), a top cover (2), and a sieve plate (3), characterized in that: The top cover (2) is fixedly installed on the upper end of the housing (1). The sieve disc (3) is located inside the housing (1) and can vertically vibrate and rotate intermittently in one direction inside the housing (1). A drive mechanism is provided inside the housing (1). The drive mechanism includes a main shaft (4), a drive assembly (5), and a deflection assembly (6). The main shaft (4) is fixedly installed on the lower end of the sieve disc (3). The drive assembly (5) is used to drive the main shaft (4) to move up and down to make the sieve disc (3) vibrate. The deflection assembly (6) is used to drive the main shaft (4) to rotate intermittently in one direction while the main shaft (4) vibrates. The screen plate (3) rotates intermittently, thereby driving the screen plate (3) to rotate in one direction. A feed cylinder (21) is fixedly installed on the top cover (2). A discharge port (22) is provided on the side of the lower end of the feed cylinder (21). A baffle cylinder (31) is fixedly installed on the upper end of the screen plate (3). The baffle cylinder (31) is sleeved on the outside of the feed cylinder (21), and a discharge port (32) is opened on the side wall of the baffle cylinder (31). When the screen plate (3) rotates to the point where the discharge port (32) and the discharge port (22) are relatively connected, the material inside the feed cylinder (21) can be discharged onto the screen plate (3) through the discharge port (22) and the discharge port (32).

2. The metal powder filtering device according to claim 1, characterized in that: The drive assembly (5) includes a mounting bracket (51), a drive shaft (52), a cam (53), a turntable (54), and a spline tube (55). The two ends of the mounting bracket (51) are fixedly connected to the two sides of the housing (1). The drive shaft (52) is horizontally rotatably mounted on the mounting bracket (51). The cam (53) is fixedly mounted on the drive shaft (52). The turntable (54) is fixedly mounted on the lower end of the main shaft (4), and the lower end of the turntable (54) abuts against the cam (53). The spline tube (55) passes through the mounting bracket (51) and is rotatably connected to the mounting bracket (51). The main shaft (4) is slidably mounted inside the spline tube (55).

3. A metal powder filtering device according to claim 2, characterized in that: The deflection assembly (6) includes a helical gear ring (61), a vertical plate (62), a helical rack (63), and a one-way transmission assembly (64). The helical gear ring (61) is sleeved on the main shaft (4), and the helical gear ring (61) is connected to the main shaft (4) in one-way transmission through the one-way transmission assembly (64). The vertical plate (62) is fixedly installed on the mounting bracket (51), and the helical rack (63) is fixedly installed on one side wall of the vertical plate (62), and the helical rack (63) is adapted to mesh with the helical gear ring (61).

4. A metal powder filtering device according to claim 3, characterized in that: The one-way transmission assembly (64) includes a rotating block (641), a sliding groove (642), a one-way slider (643), a return spring (644), and a one-way slot (645). The rotating block (641) is fixedly mounted on the main shaft (4). The sliding groove (642) is formed on the outer side wall of the rotating block (641). The one-way slider (643) is slidably mounted inside the sliding groove (642). The two ends of the return spring (644) are fixedly connected to the sliding groove (642) and the one-way slider (643), respectively. The unidirectional slots (645) are arranged in a circular array on the inner side wall of the helical tooth ring (61), and the unidirectional slots (645) are adapted to engage with the unidirectional slider (643). When the helical tooth ring (61) rotates in the forward direction, the unidirectional slots (645) engage with the unidirectional slider (643), so that the main shaft (4) rotates synchronously with the helical tooth ring (61). When the helical tooth ring (61) rotates in the reverse direction, the unidirectional slots (645) squeeze the unidirectional slider (643) to slide into the groove (642), so that the main shaft (4) does not rotate with the helical tooth ring (61).

5. A metal powder filtering device according to claim 4, characterized in that: The one-way transmission assembly (64) also includes a ratchet (646), a limiting block (647), and a limiting spring (648). The ratchet (646) is fixedly mounted on the main shaft (4). The limiting block (647) is horizontally slidably mounted on one side wall of the vertical plate (62), and the limiting block (647) is adapted to engage with the ratchet (646). The two ends of the limiting spring (648) are fixedly connected to the limiting block (647) and the vertical plate (62) respectively. When the helical gear ring (61) rotates in the forward direction and drives the main shaft (4) to rotate, the ratchet (646) rotates and squeezes the limiting block (647), causing the limiting spring (648) to contract, so that the main shaft (4) can rotate with the helical gear ring (61) without obstruction. When the helical gear ring (61) rotates in the reverse direction, the limiting block (647) engages with the ratchet (646), preventing the main shaft (4) from rotating with the helical gear ring (61).

6. A metal powder filtering device according to claim 3, characterized in that: The drive assembly (5) also includes a drive motor (56), which is fixedly mounted on the vertical plate (62), and the drive end of the drive motor (56) is connected to the drive shaft (52) through a gear transmission pair.

7. A metal powder filtering device according to claim 1, characterized in that: The height of the discharge port (32) is greater than the height of the discharge port (22), and the width of the discharge port (32) is less than the width of the discharge port (22). The lower end of the discharge port (32) extends to the inner bottom wall of the baffle cylinder (31). The bottom of the feed cylinder (21) is rotatably connected to a rotating cylinder (23). The upper end of the rotating cylinder (23) is fixedly installed with a blade (24), and the lower end of the rotating cylinder (23) extends through the feed cylinder (21) to the bottom of the feed cylinder (21). The inside of the baffle cylinder (31) is fixedly installed with a connecting rod (33). The upper end of the connecting rod (33) is inserted into the inside of the rotating cylinder (23), and the connecting rod (33) and the rotating cylinder (23) are slidably adapted.

8. A metal powder filtering device according to claim 2, characterized in that: A slag discharge ring (7) is provided below the outer side of the screen plate (3). The slag discharge ring (7) is vertically slidably connected to the inner side wall of the shell (1), and the slag discharge ring (7) is rotatably connected to the lower surface of the screen plate (3). A support spring (71) is fixedly installed between the lower surface of the slag discharge ring (7) and the upper surface of the mounting frame (51). A slag discharge channel (72) is provided at one end of the slag discharge ring (7). A slag discharge port (11) is installed on one side wall of the shell (1). The outlet end of the slag discharge channel (72) extends to the inner side of the slag discharge port (11). A discharge pipe (12) is installed at the bottom of the shell (1). The discharge pipe (12) is located below the screen plate (3).

9. A metal powder filtering device according to claim 2, characterized in that: The mounting frame (51) is provided with a net clearing mechanism (8), which includes a horizontal shaft (81), an elastic rod (82) and a bouncing ball (83). The horizontal shaft (81) is horizontally rotatably mounted on the mounting frame (51), the elastic rod (82) is fixedly mounted on the horizontal shaft (81), and the bouncing ball (83) is fixedly mounted on the end of the elastic rod (82).

10. A metal powder filtering device according to claim 9, characterized in that: The net cleaning mechanism (8) also includes a transmission rod (84), which passes through the mounting frame (51) and is rotatably connected to the mounting frame (51). The upper end of the transmission rod (84) is connected to the horizontal shaft (81) through a bevel gear transmission pair, and the lower end of the transmission rod (84) is connected to the drive shaft (52) through a bevel gear transmission pair.

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