A multi-stage screening device for magnesium powder production

Abstract

The application belongs to the technical field of magnesium powder screening, and particularly relates to a multi-stage screening device for magnesium powder production, which comprises a screening base, and elastic supports are fixed around the bottom of the screening base; materials are screened through multiple channels by a first filter screen plate, a fixed frame and three splitter plates; the front area of a second filter screen plate is provided with circular holes for screening granular magnesium powder; the rear area is provided with rhombic holes for screening irregular angular magnesium powder; under the vibration of the first filter screen plate, the agglomerates and large blocks are intercepted, and the materials fall into the second filter screen plate for continuous screening; the granular and angular powder materials are separated in two areas respectively, and are introduced into different discharge boxes through respective material flow grooves; the materials that do not pass through the screen are introduced into a particle size screening assembly for multi-stage continuous screening until complete classification, so that multi-stage classification and screening of magnesium powder with different shapes and particle sizes are realized, the problem that the traditional equipment is difficult to distinguish the shapes is solved, the screening precision and efficiency are ensured, and the quality risk caused by mixing is reduced.

Description

Technical Field

[0001] This invention belongs to the field of magnesium powder screening technology, specifically a multi-stage screening device for magnesium powder production. Background Technology

[0002] Magnesium powder is a silvery-white, metallic-lustered, and reactive metallic powder. Due to its extremely unstable chemical properties, it reacts violently with water or moisture, releasing hydrogen gas and generating high heat. When it reaches a certain concentration in the air, it is highly flammable and can easily ignite upon contact with a spark. This characteristic of being both flammable and capable of releasing dazzling white light and high temperature during combustion makes it an indispensable and important raw material in fields such as metallurgical desulfurization, aerospace industry, lighting agents, and flash powder.

[0003] In traditional magnesium powder production, the screening device is a key link in controlling product quality throughout the entire process. It usually uses vibrating screening machinery, which is driven by a motor to generate horizontal and vertical vibrations, guiding the magnesium powder through multiple stacked screens. Magnesium powder of different particle sizes will be classified by screens with different aperture sizes. Products that meet specific particle size requirements are collected from their respective outlets, while coarse particles that do not meet the size requirements are sent back for reprocessing to ensure the uniformity of the final product.

[0004] In the process of magnesium powder production, in order to screen and classify magnesium powder according to different particle sizes, traditional screening equipment mostly adopts motor-driven vibrating screens. The vibrating screen generates vibration at a specific frequency through the drive of the motor, so that magnesium powder of different particle sizes can be separated on the screen. However, traditional screening equipment is not suitable for dealing with different shapes of magnesium powder. Due to the differences in physical properties, magnesium powder of different shapes is difficult to be effectively separated by standard motor-driven vibrating screens, resulting in poor screening effect.

[0005] Therefore, the present invention provides a multi-stage screening device for magnesium powder production. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A multi-stage screening device for magnesium powder production, comprising a screening machine base; elastic supports fixedly connected to the bottom perimeter of the screening machine base; a motor housing fixedly connected to the bottom end of the screening machine base, and a vibrating motor built into the motor housing; a first filter screen plate fixedly connected to the screening machine base, and the first filter screen plate being inclined; two fixed frames fixedly connected to the inner wall of the screening machine base; three diverting plates fixedly connected to the bottom ends of the two fixed frames, and the diverting plates and the fixed frames being staggered; the internal sliding mechanism of the screening machine base... The machine is equipped with a second filter plate, which is located below the first filter plate. The second filter plate is divided into two screening areas: one screening area has circular holes, and the other screening area has rhomboid holes. Multiple inclined material chutes are located at the bottom of the screening machine base. Multiple feed boxes are fixedly connected to the bottom of the screening machine base, and the feed boxes are located at the bottom of one end of the material chutes. Feed pipes are fixedly connected to the bottom of each feed box. A particle size separation assembly is installed on the screening machine base, which is used for multi-stage screening of magnesium powder with different shapes and particle sizes.

[0008] Preferably, the particle size separation assembly includes a No. 3 filter plate, a No. 4 filter plate, a fixed plate, and a sliding plate; the No. 3 filter plate is slidably connected inside the screening machine base; the No. 4 filter plate is slidably connected inside the screening machine base, and the No. 3 filter plate is located between the No. 2 and No. 4 filter plates, the hole diameter of the No. 2 filter plate is smaller than the hole diameter of the No. 3 filter plate, and the hole diameter of the No. 3 filter plate is smaller than the hole diameter of the No. 4 filter plate; multiple fixed plates are respectively fixed to the bottom ends of the No. 2, No. 3, and No. 4 filter plates, and three fixed plates are fixed to the bottom ends of each of the No. 2, No. 3, and No. 4 filter plates; the sliding plate is slidably connected to the inner wall of the fixed plate through an elastic block, and the sliding plate is fixed to the screening machine base.

[0009] Preferably, the bottom end of the second filter plate is fixedly connected to multiple first legs; the bottom end of each first leg is slidably connected to a first sliding rod, which is fixedly connected to the screening machine base; a first elastic element is sleeved on the first sliding rod, and the first elastic element is located between the first leg and the screening machine base; the bottom end of the third filter plate is fixedly connected to multiple second legs; the bottom end of each second leg is slidably connected to a second sliding rod, which is fixedly connected to the screening machine base; a second elastic element is sleeved on the second sliding rod, which is located between the second leg and the screening machine base; the bottom end of the fourth filter plate is fixedly connected to multiple third legs; the bottom end of each third leg is slidably connected to a third sliding rod, which is fixedly connected to the screening machine base; a third elastic element is sleeved on the third sliding rod, which is located between the third leg and the screening machine base.

[0010] Preferably, both the No. 2 and No. 3 filter plates are fixedly connected to intercepting plates, and the two intercepting plates are respectively located between the No. 2 and No. 3 filter plates and between the No. 3 and No. 4 filter plates. The bottom channel height of the intercepting plate on the No. 3 filter plate is lower than the bottom channel height of the intercepting plate on the No. 2 filter plate. The intercepting plate is provided with a pushing mechanism, which is used to push away the blocked magnesium powder for re-screening.

[0011] Preferably, the feeding mechanism includes a slide rail plate, an electric slider, a connecting seat, and a rotating scraping assembly; the slide rail plate is fixedly connected to one side of the interceptor plate; the electric slider is slidably connected to the slide rail plate; the connecting seat is fixedly connected to the side of the slide rail plate near the interceptor plate; the rotating scraping assembly is disposed on the connecting seat, and the rotating scraping assembly is used to rotate the angle to scrape the magnesium powder evenly.

[0012] Preferably, the rotating scraper assembly includes a first rotating rod and a pusher plate; the first rotating rod is rotatably connected to the connecting seat via a first torsion spring; the pusher plate is fixed to the end of the first rotating rod away from the connecting seat.

[0013] Preferably, a support base is fixedly connected to the screening machine base; a fixed platform is fixedly connected to the support base; a support platform is fixedly connected to the fixed platform; a feed cylinder is fixedly connected to the support platform; a crusher is fixedly connected to the fixed platform, and the crusher is located at the bottom end of the feed cylinder and is connected to the feed cylinder; a multi-port pipe is fixedly connected to one end of the crusher; a diversion mechanism is provided on the screening machine base, which is used to distribute the waste heat from magnesium powder production to the magnesium powder screening area.

[0014] Preferably, the diversion mechanism includes a diversion pipe, a sliding seat, an air jet box, nozzles, a second air inlet pipe, and a connecting assembly; the diversion pipe is fixedly connected between the multi-port pipe and the screening machine base; the two sliding seats are slidably connected to the screening machine base, and the two sliding seats are respectively located below the second and third filter plates; the air jet box is rotatably connected to the sliding seat via a second torsion spring, and the air jet box can communicate with the screening machine base via the first air inlet pipe; multiple nozzles are fixedly connected to both sides of the air jet box; multiple spray holes are opened at the bottom end of the pusher plate; the second air inlet pipe is fixedly connected between the pusher plate and the screening machine base via a solenoid valve, and the gas in the diversion pipe can be ejected from the multiple spray holes through the screening machine base and the pusher plate; the connecting assembly is set on the slide rail plate, and the connecting assembly can push the two air jet boxes to slide by the sliding of the electric slider.

[0015] Preferably, the connecting assembly includes an extrusion block and a connecting frame; the extrusion block is slidably connected to the slide rail plate by a spring; the connecting frame is fixed between the two sliding seats and the extrusion block, and the connecting frame is slidably connected to the screening machine base.

[0016] Preferably, a baffle plate is fixedly connected to one side of the jet box, and the baffle plate has multiple air vents; a correction plate is fixedly connected inside the screening machine base near the baffle plate, and two correction plates are provided.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The present invention discloses a multi-stage screening device for magnesium powder production. The screening machine base is supported by an elastic support, and a vibrating motor inside the motor housing drives the machine base to vibrate. The first filter plate serves as the initial screening process, with a fixed frame and three diversion plates above it to screen the material through multiple channels. The second filter plate is placed inside the machine base; the front section has circular holes for screening granular magnesium powder, while the rear section has diamond-shaped holes for screening irregularly shaped magnesium powder. During screening, magnesium powder is poured into the inclined first filter plate. Under vibration, clumps and large pieces are intercepted, and the material falls into the second filter plate for further screening. The two sections separate granular and angular powders, which are then fed into different feed boxes via their respective flow channels and collected by a receiving cylinder outside the feed pipe. Material that does not pass through the screen enters the particle size separation component for multi-stage continuous screening until complete grading. This achieves multi-stage grading and screening of magnesium powder with different shapes and particle sizes, solving the problem of traditional equipment's difficulty in distinguishing shapes, ensuring screening accuracy and efficiency, and reducing the quality risks caused by mixing.

[0019] 2. The multi-stage screening device for magnesium powder production described in this invention utilizes multiple No. 1 support legs, No. 1 sliding rods, and low-rigidity No. 1 elastic elements at the bottom of the No. 2 filter plate to generate large amplitude vibrations, efficiently screening accumulated magnesium powder; the No. 3 filter plate is equipped with a medium-rigidity No. 2 elastic element to generate medium amplitude vibrations, suitable for medium-weight powders; the No. 4 filter plate is equipped with a relatively high-rigidity No. 3 elastic element to generate small amplitude vibrations, assisting large particles to enter the corresponding sieve holes. Through the multi-screen partitioning, segmented differential amplitude vibrations are achieved to match the screening requirements of magnesium powders of different particle sizes and weights, avoiding disorderly jumping of large particles due to excessive amplitude and reducing the clogging of sieve holes by small particles due to insufficient amplitude, thereby ensuring screening efficiency at each stage and smooth process flow. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram of the multi-port pipe in this invention;

[0023] Figure 3 This is a schematic diagram of the elastic support in this invention;

[0024] Figure 4 This is a partial structural cross-sectional view of the screening machine base in this invention;

[0025] Figure 5 This is a schematic diagram of the structure of the fixing plate in this invention;

[0026] Figure 6 This is a schematic diagram of the structure of filter plate No. 3 in this invention;

[0027] Figure 7 This is a schematic diagram of the pusher plate in this invention;

[0028] Figure 8 This is a schematic diagram of the jet box structure in this invention.

[0029] In the diagram: 1. Screening machine base; 11. Elastic support; 12. Motor housing; 13. Filter screen plate No. 1; 14. Fixing frame; 15. Diverter plate; 16. Filter screen plate No. 2; 17. Feed box; 18. Feed pipe; 2. Filter screen plate No. 3; 21. Filter screen plate No. 4; 22. Fixing plate; 23. Sliding plate; 3. Support leg No. 1; 31. Slide rod No. 1; 32. Elastic component No. 1; 33. Support leg No. 2; 34. Slide rod No. 2; 35. Elastic component No. 2; 36. ... 37. Support leg; 38. No. 3 slide bar; 4. Interception plate; 5. Slide rail plate; 59. Electric slider; 50. Connecting seat; 6. Push plate; 71. Support seat; 72. Fixed platform; 73. Support platform; 74. Feed cylinder; 75. Crusher; 86. Multi-port pipe; 87. Diverter pipe; 88. Sliding seat; 89. Air jet box; 80. Nozzle; 81. No. 2 air inlet pipe; 92. Extrusion block; 93. Connecting frame; 94. Baffle plate; 95. Correction plate. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figure 1 , Figures 3 to 7As shown in the embodiment of the present invention, a multi-stage screening device for magnesium powder production includes a screening machine base 1; elastic supports 11 are fixedly connected to the bottom perimeter of the screening machine base 1; a motor housing 12 is fixedly connected to the bottom end of the screening machine base 1, and a vibration motor is built into the motor housing 12; a first filter screen plate 13 is fixedly connected to the screening machine base 1, and the first filter screen plate 13 is inclined; two fixing frames 14 are fixedly connected to the inner wall of the screening machine base 1; three diversion plates 15 are fixedly connected to the bottom end of the two fixing frames 14, and the diversion plates 15 and the fixing frames 14 are staggered; a second filter screen plate 16 is slidably connected inside the screening machine base 1, and the second... The second filter plate 16 is located below the first filter plate 13. The second filter plate 16 is divided into two screening areas: one screening area has circular holes, and the other has rhomboid holes. Multiple inclined material chutes are provided at the bottom of the screening machine base 1. Multiple feed boxes 17 are fixedly connected to the bottom of the screening machine base 1, and the feed boxes 17 are located at the bottom of one end of the material chutes. Feed pipes 18 are fixedly connected to the bottom of each feed box 17. A particle size separation assembly is provided on the screening machine base 1, which is used for multi-stage screening of magnesium powder with different shapes and sizes. During magnesium powder production screening, the elastic support 11 supports... The screening base 1 serves as the main structure of the multi-stage screening device for magnesium powder production. The motor housing 12 houses a vibrating motor that drives the screening base 1. The first filter plate 13 is fixed to the screening base 1 as the first screening process for magnesium powder. Two fixing frames 14, along with three diverting plates 15, are positioned on the first filter plate 13 to divide the magnesium powder from the first screening into multiple channels for screening. The second filter plate 16 is installed inside the screening base 1. One screening area on the front of the second filter plate 16 has circular holes for screening granular magnesium powder, while the other screening area at the rear has rhomboid holes for screening irregularly shaped magnesium powder. Screening is performed on magnesium powder. When screening magnesium powder, the magnesium powder is poured onto the inclined No. 1 filter plate 13. The No. 1 filter plate 13 is inclined downward with the right side higher than the left side. As the vibrating motor drives the screening machine base 1 supported on the elastic support 11 to vibrate, the No. 1 filter plate 13 and the No. 2 filter plate 16 vibrate accordingly. The No. 1 filter plate 13 performs the first screening of magnesium powder. Clumps and large pieces of magnesium powder are filtered by the No. 1 filter plate 13. The large pieces of magnesium powder are screened out first. Then, the magnesium powder falling from the No. 1 filter plate 13 can fall onto the No. 2 filter plate 16, which is also inclined (the feed end is higher than the discharge overflow end), for the second screening of size and shape.The second filter plate 16 is inclined to cooperate with vibration to continuously feed magnesium powder along the screen surface, extending the screening time and achieving zoned screening of granular and angular magnesium powder. Simultaneously, it allows unscreened material to move towards the next screen. The two different screening zones on the second filter plate 16 separately screen granular and irregularly shaped magnesium powder. Due to the different shapes of the granular and angular magnesium powder, the granular and angular magnesium powder falling off the screen falls into different feed boxes 17 along their respective inclined chutes. The material receiving cylinder outside pipe 18 collects the magnesium powder that has not been screened on the second filter screen plate 16. The material is then vibrated and tilted to be guided to the particle size separation component for further multi-stage screening. The separation component first screens the magnesium powder by size, and then immediately screens it by shape until the magnesium powder is separated and falls. This achieves multi-stage grading and screening of magnesium powder of different shapes and sizes, solving the problem of traditional screening equipment's difficulty in separating magnesium powder of different shapes. This ensures the accuracy and efficiency of magnesium powder screening and reduces the quality problems of the finished product caused by mixing magnesium powder of different specifications.

[0032] The particle size separation assembly includes a third filter plate 2, a fourth filter plate 21, a fixed plate 22, and a sliding plate 23. The third filter plate 2 is slidably connected inside the screening machine base 1. The fourth filter plate 21 is slidably connected inside the screening machine base 1, and the third filter plate 2 is located between the second filter plate 16 and the fourth filter plate 21. The diameter of the holes in the second filter plate 16 is smaller than the diameter of the holes in the third filter plate 2, and the diameter of the holes in the third filter plate 2 is smaller than the diameter of the holes in the fourth filter plate 21. Multiple fixed plates 22 are respectively fixed to the second filter plate 1. The bottom ends of filter screen 16, filter screen 2, and filter screen 21, and the bottom ends of filter screen 16, filter screen 2, and filter screen 21 are all fixedly connected to three fixed plates 22; the sliding plate 23 is slidably connected to the inner wall of the fixed plate 22 through an elastic block, and the sliding plate 23 is fixedly connected to the screening machine base 1; when performing multi-stage screening of the unscreened magnesium powder on filter screen 16, filter screen 2 and filter screen 21 are also provided with two different screening areas, and the two different screening areas on filter screen 2 are... The diameter of the holes in the first screening area is larger than the diameter of the holes in the two different screening areas on the second screening plate 16. The diameter of the holes in the two different screening areas on the fourth screening plate 21 is larger than the diameter of the holes in the two different screening areas on the third screening plate 2. As the vibrating motor drives the second screening plate 16, the third screening plate 2, and the fourth screening plate 21 to vibrate, the fixed plate 22 slides on the sliding plate 23 through the elastic block. The magnesium powder is tilted and fed to the third screening plate 2 in conjunction with the vibration. The two different screening areas of the third screening plate 2 are for medium-sized particles and... Medium-sized angular magnesium powder is sieved, while larger magnesium powder particles are vibrated onto filter plate 21. Filter plate 21 has two different sieving zones that sieve large-particle and large-angular magnesium powder particles respectively. Magnesium powder of different sizes and shapes are discharged from their respective feed troughs, achieving multi-stage grading and sieving of magnesium powder of different shapes from fine to coarse. This ensures the precision of sieving and grading, adapts to the production needs of magnesium powder of different finished product specifications, avoids large-size particles remaining and mixing into fine-size finished products, and ensures that the sieved magnesium powder meets the corresponding particle size specifications.

[0033] The bottom end of the second filter plate 16 is fixedly connected to multiple first support legs 3; the bottom end of each first support leg 3 is slidably connected to a first sliding rod 31, and the first sliding rod 31 is fixedly connected to the screening machine base 1; a first elastic element 32 is sleeved on the first sliding rod 31, and the first elastic element 32 is located between the first support leg 3 and the screening machine base 1; the bottom end of the third filter plate 2 is fixedly connected to multiple second support legs 33; the bottom end of each second support leg 33 is slidably connected to a second sliding rod 34, and the second sliding rod 34 is fixedly connected to the screening machine base 1; a second elastic element 35 is sleeved on the second sliding rod 34, and... The second elastic element 35 is located between the second support leg 33 and the screening machine base 1; multiple third support legs 36 are fixedly connected to the bottom end of the fourth filter screen plate 21; the bottom end of the third support leg 36 is slidably connected to the third slide rod 37, and the third slide rod 37 is fixedly connected to the screening machine base 1; a third elastic element 38 is sleeved on the third slide rod 37, and the third elastic element 38 is located between the third support leg 36 and the screening machine base 1; when screening magnesium powder of different shapes and particle sizes in multiple stages, traditional screening devices only use a bottom-mounted vibrating motor to perform the same excitation throughout the entire area, however, it is difficult to achieve the same excitation force. Magnesium powder is graded and sieved according to its shape and particle size. Multiple support legs 3 and sliding rods 31 are installed at the bottom of the second filter plate 16, along with a low-rigidity composite elastic element 32. This allows for large amplitude vibration with minimal transmission loss, effectively sieving magnesium powder of varying masses. Multiple support legs 33 and sliding rods 34 are installed at the bottom of the third filter plate 2, along with a medium-rigidity elastic element 35. This allows for medium amplitude vibration with moderate transmission loss, effectively sieving magnesium powder of varying masses. The fourth filter plate... Multiple No. 3 support legs 36 and No. 3 slide rods 37 are installed at the bottom of plate 21, and a No. 3 elastic element 38 with relatively high rigidity is also installed. It can generate small and equal amplitudes with the vibration. The vibration can help large magnesium powder enter the corresponding holes for screening and falling. According to multiple screens and area division, segmented differential amplitudes are formed, which can adapt to the screening needs of magnesium powder with different particle sizes and weights. It avoids large-particle magnesium powder from jumping disorderly due to excessive amplitude, which would hinder the screening process. It also avoids small-particle magnesium powder from clogging the screen holes due to insufficient amplitude. It ensures the screening efficiency of different levels of screens, reduces the problem of screen hole clogging, and ensures the smoothness of screening at each level.

[0034] like Figures 1 to 8As shown, intercepting plates 4 are fixedly connected to both the second filter plate 16 and the third filter plate 2. The two intercepting plates 4 are located between the second filter plate 16 and the third filter plate 2, and between the third filter plate 2 and the fourth filter plate 21, respectively. The bottom channel height of the intercepting plate 4 on the third filter plate 2 is lower than that on the second filter plate 16. A pushing mechanism is provided on the intercepting plate 4 to push away the blocked magnesium powder for re-screening. It should be noted that the intercepting plate 4 is used to limit the maximum thickness of the magnesium powder accumulation layer on the screen surface. The magnesium powder particles are mainly conveyed to the next level screen by overflowing over the top of the intercepting plate, rather than passing through the bottom channel of the intercepting plate. The bottom channel of the intercepting plate 4 only allows a thin layer of powder from the bottom of the screen to pass through. When a large amount of magnesium powder is present on the second filter plate 16... When screening on filter plates 6 and 3, some magnesium powder vibrates to the tail end without being screened. It is intercepted at the tail ends of filter plates 2 and 3 by two intercepting plates 4 respectively. When the material accumulation thickness on the screen exceeds the height of the intercepting plate 4, the material overflows from the top of the intercepting plate 4 into the next stage screen. The bottom channel height of the intercepting plate 4 on filter plate 3 is lower, which is used to control the material layer on the surface of filter plate 3 to be thinner, so as to avoid the material in the middle screen being overloaded and clogging the screen holes. When too much magnesium powder is blocked at the intercepting plate 4, the pushing mechanism can push the blocked magnesium powder back to be screened again, reducing the large magnesium powder particles blocking the screening path outlet, preventing magnesium powder from directly entering the next stage screening component, reducing the probability of coarse magnesium powder mixed into fine finished product, and ensuring the classification accuracy of multi-stage screening.

[0035] The feeding mechanism includes a slide rail plate 5, an electric slider 51, a connecting seat 52, and a rotating scraping assembly. The slide rail plate 5 is fixedly connected to one side of the interceptor plate 4. The electric slider 51 is slidably connected to the slide rail plate 5. The connecting seat 52 is fixedly connected to the side of the slide rail plate 5 near the interceptor plate 4. The rotating scraping assembly is mounted on the connecting seat 52 and is used to rotate to scrape the magnesium powder evenly. When the magnesium powder blocked at the interceptor plate 4 is pushed back, the slide rail plate 5 is fixed on the screening machine base 1 to push the electric slider 51 back. 1. Support: The electric slider 51 is energized and slides on the slide rail plate 5, driving the rotating scraper assembly connected to the connecting seat 52 to slide synchronously. The rotating scraper assembly can rotate and tilt to scrape the accumulated magnesium powder evenly, pushing the magnesium powder blocked at the baffle plate back to the surface of the screen, so that the magnesium powder can be vibrated and screened again along the inclined screen, reducing the long-term accumulation of large-diameter magnesium powder at the baffle plate, blocking the passage path of subsequent magnesium powder, ensuring smooth discharge of each level of screen during the screening process, and maintaining stable screening efficiency.

[0036] The rotating scraping assembly includes a first rotating rod and a pusher plate 6. The first rotating rod is rotatably connected to the connecting seat 52 via a first torsion spring. The pusher plate 6 is fixed to the end of the first rotating rod away from the connecting seat 52. When the magnesium powder accumulated at the interceptor plate 4 is pushed back, the electric slider 51 is energized to drive the connecting seat 52 to slide. The torsion spring on the connecting seat 52 returns to its original elasticity after the pusher plate 6 moves away from the interceptor plate 4, causing the first rotating rod and the pusher plate 6 to tilt. The pusher plate 6, which was originally perpendicular to the interceptor plate 4, is now tilted. The tilted pusher plate 6 can scrape the accumulated magnesium powder and push it back in the opposite direction of the tilted screen, so that the large-diameter magnesium powder can be redispersed on the surface of the screen for vibratory screening. The tilt angle can limit the large-diameter magnesium powder to the current screening area, ensuring that the current screen can fully screen the magnesium powder and further reduce the probability of mixing magnesium powder of different specifications.

[0037] A support base 7 is fixedly connected to the screening machine base 1; a fixed platform 71 is fixedly connected to the support base 7; a support platform 72 is fixedly connected to the fixed platform 71; a feed cylinder 73 is fixedly connected to the support platform 72; a crusher 74 is fixedly connected to the fixed platform 71, and the crusher 74 is located at the bottom end of the feed cylinder 73 and is connected to the feed cylinder 73; a multi-port pipe 75 is fixedly connected to one end of the crusher 74; a diversion mechanism is provided on the screening machine base 1, which is used to distribute the waste heat from magnesium powder production to the magnesium powder screening area; during magnesium powder production, the multi-port pipe 75 is connected to the high-temperature exhaust gas waste heat pipe of the atomization powdering process, and the waste heat generated during magnesium powder production is recycled by passing it into the multi-port pipe 75; the multi-port pipe 75 also introduces some low-temperature hot air into the operating area. Inside the crusher 74, the crusher 74 breaks up the clumps of magnesium powder. Hot air simultaneously dries the magnesium powder while breaking it up, reducing the likelihood of the magnesium powder clumping and clogging the screen holes due to high moisture content. The support base 7, together with the fixed platform 71, supports the support platform 72. The feed cylinder 73 and the crusher 74 are connected on the support platform 72. The magnesium powder is fed into the crusher 74 through the feed cylinder 73 for breaking up. The broken magnesium powder falls from the bottom of the crusher 74 onto the first filter plate 13 for screening. The other parts of the multi-channel pipe 75 are supplied with low-temperature hot air into the diversion mechanism, which can dry the magnesium powder being screened, reduce the adhesion of magnesium powder to the screen, ensure the smoothness of magnesium powder screening, and at the same time recover and utilize production waste heat, reduce additional energy consumption, and ensure energy saving and environmental protection in magnesium powder production.

[0038] The diversion mechanism includes a diversion pipe 8, a sliding seat 81, an air jet box 82, a nozzle 83, a second air inlet pipe 84, and a connecting assembly; the diversion pipe 8 is fixedly connected between the multi-port pipe 75 and the screening machine base 1; the two sliding seats 81 are slidably connected to the screening machine base 1, and the two sliding seats 81 are respectively located below the second filter plate 16 and the third filter plate 2; the air jet box 82 is rotatably connected to the sliding seat 81 through a second torsion spring, and the air jet box 82 can communicate with the screening machine base 1 through the first air inlet pipe; the multiple nozzles 83 are fixedly connected to the two sides of the air jet box 82. The bottom end of the pusher plate 6 has multiple spray holes; the second air inlet pipe 84 is fixed between the pusher plate 6 and the screening machine base 1 by a solenoid valve, and the gas in the diversion pipe 8 can be sprayed out from the multiple spray holes through the screening machine base 1 and the pusher plate 6; the connecting assembly is set on the slide rail plate 5, and the connecting assembly can slide the two air jet boxes 82 by sliding the electric slider 51; when using a portion of the recovered low-temperature waste heat to dry the screened magnesium powder, a portion of the low-temperature waste heat is sent to the interior of the screening machine base 1 through the diversion pipe 8, and is diverted by the screening machine base 1 to the air jet connected to the first air inlet pipe. Inside the pusher plate 6, which is connected to box 82 and second air inlet pipe 84, multiple nozzles 83 and multiple nozzle holes at the bottom of the pusher plate 6 spray out the magnesium powder. The solenoid valve on the second air inlet pipe 84 is normally closed. When the electric slider 51 tilts the pusher plate 6 to push back the magnesium powder, the solenoid valve on the second air inlet pipe 84 opens, and the multiple nozzle holes at the bottom of the pusher plate 6 spray out gas to evenly dry the magnesium powder at the bottom during the pushing and scraping process. Meanwhile, the first air inlet pipe remains connected, and multiple nozzles 83 continuously blow air to dry the magnesium powder on the second filter plate 16 and the third filter plate 2. During the sliding of slider 51, the electric slider 51 can trigger the connecting component to drive multiple sliding seats 81 to slide, thereby driving multiple nozzles 83 to slide and spray air, reducing the moisture content of magnesium powder and reducing the adhesion and clogging of magnesium powder in the screen holes. At the same time, the hot air can blow the magnesium powder loose, ensuring the effect of vibrating screening. Moreover, during the sliding of multiple air spray boxes 82, the air spray boxes 82 on the sliding seat 81 rotate through the second torsion spring, and some nozzles 83 can tilt and blow air in the opposite direction towards the holes of the second filter plate 16 and the third filter plate 2, reducing the clogging of the holes of the second filter plate 16 and the third filter plate 2.

[0039] The connecting assembly includes an extrusion block 9 and a connecting frame 91. The extrusion block 9 is slidably connected to the slide rail plate 5 via a spring. The connecting frame 91 is fixed between the two sliding seats 81 and the extrusion block 9, and is slidably connected to the screening machine base 1. When the electric slider 51 slides, it can push the extrusion block 9 to slide. The spring is stretched and stressed. The extrusion block 9 is connected to the two sliding seats 81 via the connecting frame 91, so that the two sliding seats 81 slide synchronously with the extrusion block 9. This causes the two air jet boxes 82 to tilt and slide, backflushing the holes of the second filter plate 16 and the third filter plate 2, loosening the magnesium powder stuck in the holes, promoting the removal of the stuck magnesium powder from the screen holes, and reducing the probability of screen blockage. When the electric slider 51 returns to its initial position, the spring drives the extrusion block 9 to return to its initial position, thereby pulling the two sliding seats 81 to return to their initial position, waiting for the backflushing to be triggered again during the next feeding process.

[0040] A baffle plate 92 is fixedly connected to one side of the jet box 82, and multiple ventilation holes are provided on the baffle plate 92. A correction plate 93 is fixedly connected to the inside of the screening machine base 1 near the baffle plate 92, and two correction plates 93 are provided. When the spring pulls the compression block 9 and the two jet boxes 82 to reset, the baffle plate 92 on the jet box 82 can fit against the correction plate 93 fixed on the screening machine base 1 and squeeze it until the baffle plate 92 is squeezed from the inclined state to the vertical state, thereby resetting the inclined jet box 82 to the vertical state. The nozzles 83 on both sides of the jet box 82 can continue to spray air to both sides. The air from the multiple nozzles 83 near the baffle plate 92 can be discharged from the multiple ventilation holes, reducing the possibility of magnesium powder falling into the nozzle holes of the nozzles 83 and clogging them when it is screened and falls. This ensures the effect of jet drying and backflushing cleaning, and reduces the amount of additional cleaning and maintenance work.

[0041] The entire screening process of this device is as follows: Magnesium powder is fed into the crusher 74 through the feed cylinder 73. The crusher 74 breaks up the clumps of magnesium powder, and the waste heat from production is introduced through the multi-port pipe 75 to pre-dry the material. The processed magnesium powder falls onto the right side of the feed end of the No. 1 filter plate 13, which is inclined on the right and lower on the left, on the screening machine base 1. The vibrating motor in the motor box 12 drives the machine body to vibrate, and the elastic support 11 provides support. The No. 1 filter plate 13 performs initial screening, and large pieces of material are intercepted. The magnesium powder that passes through the screen is guided by the diversion plate 15 under the fixed frame 14 and sent to the feed area of ​​the No. 2 filter plate 16. The material that does not pass through the No. 1 filter plate 13 flows along the screen surface and is also guided to the No. 2 filter plate 16 by the inner side of the screening machine base 1.

[0042] The inclined No. 2 filter plate 16 vibrates under the support of No. 1 support leg 3, No. 1 slide rod 31, and No. 1 elastic element 32, and uses circular and diamond-shaped holes to screen granular and angular magnesium powder. After passing through the screen, qualified powder enters the feed box 17 through the feed chute and is collected through the feed pipe 18. Magnesium powder that does not pass through the screen moves along the screen surface, overflows over the top of the interceptor plate 4 at the tail end of the No. 2 filter plate 16, and flows to the No. 3 filter plate 2. The No. 3 filter plate 2 is provided with differentiated vibration by No. 2 support leg 33, No. 2 slide rod 34, and No. 2 elastic element 35 to continue to classify and screen medium-sized magnesium powder. The bottom channel height of the interceptor plate 4 at this stage is lower, which limits the thickness of the screen surface layer. Large particles that cannot pass through the screen overflow over the interceptor plate 4 of the No. 3 filter plate 2 to the No. 4 filter plate 21. The No. 4 filter plate 21 relies on No. 3 support leg 36, No. 3 slide rod 37, and No. 3 elastic element 38 to achieve small amplitude vibration and complete the screening of large-sized magnesium powder.

[0043] During the screening process, the fixed plate 22 and the sliding plate 23 work together to ensure the sliding vibration of each filter screen plate; the electric slider 51 on the slide rail plate 5 drives the rotating scraping assembly composed of the connecting seat 52, the first rotating rod and the pusher plate 6 to reciprocate; when the interceptor plate 4 is blocked, the pusher plate 6 pushes the accumulated magnesium powder back to the screen for re-screening; the waste heat hot air from the multi-pass pipe 75 enters the diversion mechanism through the diversion pipe 8; the air jet box 82 assembled on the sliding seat 81 through the second torsion spring sprays air upward to dry the material with the help of the nozzle 83; the electric slider 51 moves to squeeze the extrusion block 9, and drives the sliding seat 81 and the air jet box 82 to slide through the connecting frame 91; the baffle plate 92 on the air jet box 82 works with the correction plate 93 to achieve position reset; after the second air inlet pipe 84 is opened, hot air is sprayed out from the bottom nozzle of the pusher plate 6 to assist drying; the nozzle 83 can reverse to blow back the screen holes to clear blockage, realizing the multi-stage grading and screening of magnesium powder according to particle size and shape.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage screening device for the production of magnesium powder, characterized by: The system includes a screening machine base; elastic supports are fixedly connected to the bottom of the screening machine base around its perimeter; a motor housing is fixedly connected to the bottom of the screening machine base, and a vibrating motor is built into the motor housing; a first filter screen plate is fixedly connected to the screening machine base; two fixing frames are fixedly connected to the inner wall of the screening machine base; three diverting plates are fixedly connected to the bottom of the two fixing frames; a second filter screen plate is slidably connected inside the screening machine base, and the second filter screen plate is divided into two screening areas, one area with circular holes and the other area with rhomboid holes; multiple inclined material troughs are opened at the bottom of the screening machine base; multiple feed boxes are fixedly connected to the bottom of the screening machine base; feed pipes are fixedly connected to the bottom of the feed boxes; and a particle size separation component is provided on the screening machine base, which is used for multi-stage screening of magnesium powder with different shapes and particle sizes.

2. A multi-stage screening device for the production of magnesium powder according to claim 1, characterized in that: The particle size separation assembly includes a No. 3 filter plate, a No. 4 filter plate, a fixed plate, and a sliding plate. The No. 3 filter plate is slidably connected inside the screening machine base. The No. 4 filter plate is slidably connected inside the screening machine base, and the No. 3 filter plate is located between the No. 2 and No. 4 filter plates. The diameter of the holes in the No. 2 filter plate is smaller than the diameter of the holes in the No. 3 filter plate, and the diameter of the holes in the No. 3 filter plate is smaller than the diameter of the holes in the No. 4 filter plate. Multiple fixed plates are respectively fixed to the bottom ends of the No. 2, No. 3, and No. 4 filter plates, and three fixed plates are fixed to the bottom ends of each of the No. 2, No. 3, and No. 4 filter plates. The sliding plate is slidably connected to the inner wall of the fixed plate through an elastic block, and the sliding plate is fixed to the screening machine base.

3. A multi-stage screening device for the production of magnesium powder according to claim 2, characterized in that: The bottom end of the second filter plate is fixedly connected to multiple first-type support legs; the bottom end of each first-type support leg is slidably connected to a first-type sliding rod, which is fixedly connected to the screening machine base; a first-type elastic element is sleeved on the first-type sliding rod, and the first-type elastic element is located between the first-type support leg and the screening machine base. The bottom end of the third filter plate is fixedly connected to multiple second-type support legs; the bottom end of each second-type support leg is slidably connected to a second-type sliding rod, which is fixedly connected to the screening machine base; a second-type elastic element is sleeved on the second-type sliding rod, which is located between the second-type support leg and the screening machine base. The bottom end of the fourth filter plate is fixedly connected to multiple third-type support legs; the bottom end of each third-type support leg is slidably connected to a third-type sliding rod, which is fixedly connected to the screening machine base; a third-type elastic element is sleeved on the third-type sliding rod, which is located between the third-type support leg and the screening machine base.

4. A multi-stage screening device for the production of magnesium powder according to claim 2, characterized in that: Both filter plates No. 2 and No. 3 are fixedly connected to intercepting plates, and the two intercepting plates are located between filter plates No. 2 and No. 3 and between filter plates No. 3 and No. 4, respectively. The bottom channel height of the intercepting plate on filter plate No. 3 is lower than that of the bottom channel height of the intercepting plate on filter plate No.

2. The intercepting plate is provided with a pushing mechanism, which is used to push away the blocked magnesium powder for re-screening.

5. A multi-stage screening device for magnesium powder production according to claim 4, characterized in that: The feeding mechanism includes a slide rail plate, an electric slider, a connecting seat, and a rotating scraping assembly; the slide rail plate is fixedly connected to one side of the intercepting plate; the electric slider is slidably connected to the slide rail plate; the connecting seat is fixedly connected to the side of the slide rail plate near the intercepting plate; the rotating scraping assembly is disposed on the connecting seat, and the rotating scraping assembly is used to rotate the angle to scrape the magnesium powder evenly.

6. A multi-stage screening device for magnesium powder production according to claim 5, characterized in that: The rotating scraper assembly includes a first rotating rod and a pusher plate; the first rotating rod is rotatably connected to the connecting seat via a first torsion spring; the pusher plate is fixed to the end of the first rotating rod away from the connecting seat.

7. A multi-stage screening device for magnesium powder production according to claim 6, characterized in that: A support base is fixedly connected to the screening machine base; a fixed platform is fixedly connected to the support base; a support platform is fixedly connected to the fixed platform; a feed cylinder is fixedly connected to the support platform; a crusher is fixedly connected to the fixed platform, and the crusher is located at the bottom end of the feed cylinder and is connected to the feed cylinder; a multi-port pipe is fixedly connected to one end of the crusher; a diversion mechanism is provided on the screening machine base, which is used to distribute the waste heat from magnesium powder production to the magnesium powder screening area.

8. A multi-stage screening device for magnesium powder production according to claim 7, characterized in that: The diversion mechanism includes a diversion pipe, sliding seats, air jet boxes, nozzles, a second air inlet pipe, and a connecting assembly. The diversion pipe is fixedly connected between the multi-port pipe and the screening machine base. Two sliding seats are slidably connected to the screening machine base, and the two sliding seats are respectively located below the second and third filter screens. The air jet box is rotatably connected to the sliding seats via a second torsion spring, and the air jet box can communicate with the screening machine base via the first air inlet pipe. Multiple nozzles are fixedly connected to both sides of the air jet box. Multiple spray holes are opened at the bottom end of the pusher plate. The second air inlet pipe is fixedly connected between the pusher plate and the screening machine base via a solenoid valve, and the gas in the diversion pipe can be ejected from the multiple spray holes through the screening machine base and the pusher plate. The connecting assembly is set on the slide rail plate, and the connecting assembly can push the two air jet boxes to slide by the sliding of the electric slider.

9. A multi-stage screening device for magnesium powder production according to claim 8, characterized in that: The connecting assembly includes an extrusion block and a connecting frame; the extrusion block is slidably connected to the slide rail plate by a spring; the connecting frame is fixed between the two sliding seats and the extrusion block, and the connecting frame is slidably connected to the screening machine base.

10. A multi-stage screening device for magnesium powder production according to claim 9, characterized in that: A baffle plate is fixed to one side of the air jet box, and multiple air vents are provided on the baffle plate; a correction plate is fixed to the inside of the screening machine base near the baffle plate, and two correction plates are provided.

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