A grading and purification device for spherical silicon micropowder

Abstract

The present invention belongs to the technical field of silicon micropowder production, and specifically is a grading and purification device for spherical silicon micropowder, comprising a base, a separation cylinder is installed on the base, a vibration motor is installed on the separation cylinder, a screen and a bottom plate are installed in the separation cylinder, a feed port, a first discharge port and a second discharge port are installed on the separation cylinder; a rotating shaft driven by a driving motor is installed on the bottom plate, an upper rod and a lower rod are installed on the rotating shaft, the interior of the rotating shaft is hollow, a blowing groove is provided on the lower rod, and a corresponding receiving groove is provided on the upper rod; an arc plate and an impact plate are installed on the upper rod, and the outlet direction of the air jet is inclined to the impact plate; the present invention has a simple structure, and can use a scraper rod to jet to continuously clean the screen to avoid the raw material from clogging the screen, and at the same time, the rotation of the scraper rod and the gas sprayed from the scraper rod are used to stir and impact the raw material, so that the raw material is dispersed and broken, and the screen is prevented from being clogging due to agglomeration and agglomeration of the raw material.

Description

Technical Field

[0001] The invention belongs to the technical field of silicon micropowder production, in particular to a grading and purification device for spherical silicon micropowder. Background Art

[0002] Silica powder is a non-toxic, odorless, pollution-free inorganic non-metallic material that is widely used in chemical, electronics, integrated circuits, electrical appliances, plastics, coatings, advanced paints, rubber, national defense and other fields.

[0003] During the processing of silicon micropowder, the raw materials need to be separated and purified. Most of the existing raw material purification methods are simple purification. Although simple purification can be achieved, there is a problem of incomplete separation for raw materials with more agglomerates. At the same time, the agglomerated raw materials are also prone to blockage of the filtering device. Summary of the invention

[0004] In order to make up for the shortcomings of the existing technology, the screen is continuously cleaned by using a scraper rod to spray air to avoid the raw material from clogging the screen. At the same time, the raw material is stirred and impacted by the rotation of the scraper rod and the gas sprayed from the scraper rod to disperse and crush the raw material to avoid the raw material agglomeration and agglomeration causing clogging of the screen. The present invention proposes a grading and purification equipment for spherical silicon micropowder.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the grading and purification equipment of spherical silicon micropowder described in the present invention comprises a base, a positioning rod is installed on the base, a separation cylinder is installed on the positioning rod, a spring is installed between the separation cylinder and the positioning rod, a vibration motor is installed at the bottom of the separation cylinder, a screen and a bottom plate are installed in the separation cylinder, a feed port is installed on the top cover of the separation cylinder, and a discharge port 1 and a discharge port 2 are installed on the side wall of the separation cylinder, the discharge port 1 is located above the screen, and the discharge port 2 is located above the bottom plate;

[0006] A rotating shaft is installed on the bottom plate, and the rotating shaft is driven by a driving motor. The driving motor is located on the lower surface of the bottom plate, and a scraper rod is installed on the rotating shaft. A smooth layer is provided on the surface of the scraper rod contacting the screen, and the smooth layer is a polytetrafluoroethylene layer. The scraper rod comprises an upper rod and a lower rod located on both sides of the screen. The interior of the rotating shaft is hollow, and an air pipe is installed on the lower end of the rotating shaft. The upper rod is installed on the rotating shaft through an upper connecting block, and the lower rod is installed on the rotating shaft through a lower connecting block. A connecting cavity is provided inside the lower connecting block, and a blowing groove is provided on the lower rod. The blowing groove is connected with the interior of the rotating shaft through the connecting cavity, and the blowing groove sprays the gas transported by the air pipe. A receiving groove and an air jet are provided on the upper rod, and the receiving groove corresponds to the blowing groove.

[0007] An arc plate is installed at the lower end of the upper rod, and an impact plate is installed at the upper end of the upper rod. The jet port is located between the arc plate and the impact plate. The arc plate, the impact plate and the jet port are located on the same side of the upper rod, and the outlet direction of the jet port is inclined toward the impact plate.

[0008] Preferably, an elastic sheet is installed on the upper rod, and the elastic sheet is located between the air jet and the impact plate;

[0009] A stopper is arranged on the side of the impact plate facing the air jet port.

[0010] Preferably, a fixing ring is installed on the inner wall of the separation cylinder, the screen is fixedly installed on the fixing ring, a material guide groove is opened on the fixing ring, the material guide groove is located between the edge of the screen and the inner wall of the separation cylinder, and the discharge port 1 is connected to the material guide groove.

[0011] Preferably, a baffle is installed on the inner wall of the separation cylinder, the baffle is located above the material guide trough, and the cross section of the baffle is arc-shaped;

[0012] The width of the projection of the baffle on the horizontal plane is greater than the width of the projection of the material guide trough on the horizontal plane, and there is a gap between the end of the baffle away from the inner wall of the separation cylinder and the screen;

[0013] The bottom surface of the material guiding trough is inclined toward the direction of the material outlet.

[0014] Preferably, fluff is installed on one end of the baffle away from the separation cylinder, and the fluff is located in the gap between the baffle and the screen.

[0015] Preferably, a material dividing plate is installed on the top cover, and the material dividing plate is located directly below the feed inlet, and the middle position of the material dividing plate is arched upward.

[0016] Preferably, a bracket is installed in the feed port, an elastic rod is installed on the bracket, and the other end of the elastic rod is connected to the dividing plate.

[0017] Preferably, a protrusion is provided at the edge of the dividing plate, and the dividing plate is connected to the elastic rod via a ball shaft, and the friction force of the ball shaft is relatively large.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The grading and purification equipment for spherical silicon micropowder described in the present invention, by arranging a screen, an upper rod, a lower rod, a jet nozzle, an impact plate and an elastic sheet, cooperates with the rotation of the scraper rod and the gas blown from the lower rod to the upper rod, to impact and clean the mesh of the screen, so as to dredge the mesh that has not been blocked, is about to be blocked or has been blocked, and prevent the blockage of the mesh in advance to avoid the blockage of the screen. At the same time, after cleaning the screen, the ejected gas will further blow away the raw materials on the screen, so that the raw materials impact and hit the impact plate, which will cause the raw materials to be broken and dispersed during the impact, and avoid the raw materials from agglomerating and agglomerating, resulting in the blockage of the screen and affecting the normal use of the purification equipment.

[0020] 2. The grading and purification equipment for spherical silicon micropowder described in the present invention can enable the unqualified raw materials that are screened out to quickly leave the screen and be discharged by arranging material guide troughs, baffles and dividing plates, thereby preventing the unqualified raw materials from staying on the screen for too long, resulting in excessive raw materials on the screen and clogging the screen. At the same time, the dividing plate makes the added raw materials relatively dispersed, increases the distribution area of ​​the raw materials falling on the screen, speeds up the screening efficiency, and avoids the accumulation and accumulation of raw materials on the screen, which affects the screening of the raw materials by the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a front view of the purification device of the present invention;

[0023] Figure 2 It is a schematic structural diagram of the purification device of the present invention;

[0024] Figure 3 is a cross-sectional view of a purification device of the present invention;

[0025] Figure 4 is a cross-sectional view of a scraper rod in the purification device of the present invention;

[0026] Figure 5 yes Figure 2 A partial enlarged view of the middle part;

[0027] Figure 6 yes Figure 3 A partial enlarged view of point B in the middle;

[0028] Figure 7 yes Figure 3 A partial enlarged view of point C in the middle;

[0029] In the figure: base 1, positioning rod 11, spring 12, separation cylinder 2, vibration motor 21, air pipe 22, discharge port 1 23, discharge port 2 24, top cover 25, feed port 26, drive motor 27, screen 3, bottom plate 31, rotating shaft 32, scraper rod 4, lower rod 41, blowing groove 411, upper rod 42, air jet 421, impact plate 422, stopper 423, arc plate 424, elastic sheet 425, receiving groove 426, smooth layer 43, upper connecting block 44, lower connecting block 45, fixing ring 5, baffle 51, fluff 52, dividing plate 6, bracket 61, elastic rod 62, protrusion 63. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 7 As shown, a grading and purification device for spherical silicon micropowder according to the present invention comprises a base 1, a positioning rod 11 is installed on the base 1, a separation cylinder 2 is installed on the positioning rod 11, a spring 12 is installed between the separation cylinder 2 and the positioning rod 11, a vibration motor 21 is installed at the bottom of the separation cylinder 2, a screen 3 and a bottom plate 31 are installed in the separation cylinder 2, a feed port 26 is installed on the top cover 25 of the separation cylinder 2, and a discharge port 1 23 and a discharge port 2 24 are installed on the side wall of the separation cylinder 2, the discharge port 1 23 is located above the screen 3, and the discharge port 2 24 is located above the bottom plate 31;

[0032] The bottom plate 31 is provided with a rotating shaft 32, which is driven by a driving motor 27, which is located on the lower surface of the bottom plate 31. A scraper rod 4 is installed on the rotating shaft 32, and a smooth layer 43 is provided on the surface of the scraper rod 4 contacting the screen 3, and the smooth layer 43 is a polytetrafluoroethylene layer. The scraper rod 4 includes an upper rod 42 and a lower rod 41 located on both sides of the screen 3. The rotating shaft 32 is hollow inside, and an air pipe 22 is installed at the lower end of the rotating shaft 32. The upper rod 4 2 is installed on the rotating shaft 32 through the upper connecting block 44, the lower rod 41 is installed on the rotating shaft 32 through the lower connecting block 45, the lower connecting block 45 has a connecting cavity inside, the lower rod 41 has a blowing groove 411, the blowing groove 411 is connected with the inside of the rotating shaft 32 through the connecting cavity, the blowing groove 411 sprays the gas transported by the air pipe 22, the upper rod 42 has a receiving groove 426 and a jet port 421, the receiving groove 426 and the blowing groove 411 correspond to each other;

[0033] The lower end of the upper rod 42 is installed with an arc plate 424, the upper end of the upper rod 42 is installed with an impact plate 422, the jet port 421 is located between the arc plate 424 and the impact plate 422, the arc plate 424, the impact plate 422 and the jet port 421 are located on the same side of the upper rod 42, and the outlet direction of the jet port 421 is inclined to point to the impact plate 422;

[0034] During operation, the staff starts the vibration motor 21 and the drive motor 27 in sequence through the controller, and then feeds the spherical silicon micropowder raw material to be processed from the feed port 26 into the separation cylinder 2, so that the raw material falls onto the screen 3. At this time, under the action of the vibration motor 21, the separation cylinder 2 and the screen 3 inside will vibrate, so that the raw material is screened and purified: the spherical silicon micropowder that meets the requirements passes through the screen 3 and falls onto the bottom plate 31, and then is discharged and collected from the discharge port 24, and the spherical silicon micropowder that does not meet the requirements stays above the screen 3, and then is discharged and collected from the discharge port 1 23;

[0035] At the same time, when the raw material is screened by the screen 3, the upper rod 42 and the lower rod 41 installed on both sides of the screen 3 will rotate under the drive of the driving motor 27, so as to stir the raw material falling on the screen 3, so as to avoid the accumulation and accumulation of the raw material on the screen 3, which will affect the screening effect and screening efficiency of the screen 3 on the raw material;

[0036] At the same time, since the upper rod 42 and the lower rod 41 are respectively provided with corresponding blowing grooves 411 and receiving grooves 426, the gas transported from the outside passes through the screen 3 from bottom to top, and finally enters the interior of the separation cylinder 2 from the air jet 421 on the upper rod 42. In this process, the gas passing through the screen 3 from bottom to top will impact, clean and dredge the mesh holes on the screen 3, ensuring that the mesh holes on the screen 3 are unobstructed, avoiding the mesh holes on the screen 3 from being blocked, and affecting the normal operation of the purification equipment;

[0037] At the same time, since the upper rod 42 is provided with an arc plate 424 and an impact plate 422, the raw materials on the screen 3 will be scooped up during the rotation of the upper rod 42, so that the raw materials are in contact with the gas blown in the air jet 421, and the raw materials are blown away and impacted onto the impact plate 422. In this process, the blown away raw materials will impact onto the impact plate 422, so that the raw materials are dispersed with each other, and the raw materials are prevented from agglomerating or agglomerating, which results in the raw materials being unable to be screened smoothly or the agglomerated raw materials clogging the screen 3.

[0038] At the same time, after the raw materials are blown away, they will be relatively evenly dispersed on the screen 3, avoiding the accumulation and stacking of the raw materials, making it convenient for the screen 3 to screen the raw materials and improving the working efficiency of the purification equipment.

[0039] As an embodiment of the present invention, an elastic sheet 425 is installed on the upper rod 42, and the elastic sheet 425 is located between the air jet 421 and the impact plate 422;

[0040] A stopper 423 is provided on the side of the impact plate 422 facing the jet port 421;

[0041] When the gas is ejected from the jet port 421, the elastic sheet 425 on the upper rod 42 will be impacted, so that the elastic sheet 425 will be deformed back and forth under the action of its own elasticity, and when the elastic sheet 425 is deformed by the impact, the elastic sheet 425 will contact and impact the surface of the impact plate 422. In this process, the elastic sheet 425 that reciprocates and contacts the impact plate 422 will squeeze and impact the raw materials that contact the impact plate 422, so that the relatively compact raw materials that are agglomerated and agglomerated are broken and dispersed, so as to avoid that the compact and dense raw materials cannot be broken after impacting the impact plate 422, which affects the screening effect and screening efficiency of the screen 3 on the raw materials.

[0042] At the same time, a stopper 423 is provided on the surface of the impact plate 422, so that the blown raw materials will be blocked by the stopper 423 after contacting the impact plate 422, thereby increasing the effect of the interaction between the raw materials and the impact plate 422, making the raw materials fully dispersed, and avoiding agglomeration and agglomeration. At the same time, by providing the stopper 423, the raw materials will not quickly slide along the surface of the impact plate 422 after contacting the impact plate 422, which can facilitate the subsequent elastic sheet 425 to squeeze and crush the relatively tight and non-breakable raw materials when contacting the impact plate 422, thereby ensuring that the raw materials on the screen 3 are relatively uniform and dispersed, and facilitating the purification equipment to screen, grade and purify the raw materials.

[0043] As an embodiment of the present invention, a fixing ring 5 is installed on the inner wall of the separation cylinder 2, the screen 3 is fixedly installed on the fixing ring 5, a material guide groove is opened on the fixing ring 5, the material guide groove is located between the edge of the screen 3 and the inner wall of the separation cylinder 2, and the discharge port 23 is connected to the material guide groove;

[0044] After the raw materials are screened by the screen 3, the spherical silicon micropowder that does not meet the requirements will stay on the screen 3. Later, with the vibration of the screen 3, the spherical silicon micropowder that does not meet the requirements will gradually move toward the inner wall of the separation cylinder 2 and be discharged from the discharge port opened on the cylinder wall. In this process, since the position of the discharge port on the cylinder wall is fixed and the number is single, some spherical silicon micropowder raw materials that do not meet the requirements will enter the discharge port after moving on the screen 3 for one week, and the raw material residence time is relatively long. Therefore, when a large amount of raw materials are screened, graded and purified, it is easy for too much spherical silicon micropowder that does not meet the requirements to remain on the screen 3. After the subsequent raw materials are added, the amount of spherical silicon micropowder on the screen 3 is too much, resulting in the screen 3 being unable to screen the raw materials in time and too much raw material squeezing and blocking the screen 3, affecting the normal operation of the purification equipment;

[0045] At the same time, a material guide trough is provided so that the material guide trough is distributed around the screen 3. After the screen 3 screens out the spherical silicon micropowder that does not meet the requirements, this part of the spherical silicon micropowder that does not meet the requirements can fall from the edge of the screen 3 into the material guide trough relatively quickly, and then reach the discharge port 23 in the material guide trough and be discharged, thereby reducing the movement distance and residence time of the spherical silicon micropowder that does not meet the requirements on the screen 3, and avoiding excessive accumulation of raw materials on the screen 3, resulting in blockage of the screen 3.

[0046] As an embodiment of the present invention, a baffle 51 is installed on the inner wall of the separation cylinder 2, and the baffle 51 is located above the material guide groove, and the cross section of the baffle 51 is arc-shaped;

[0047] The width of the projection of the baffle plate 51 on the horizontal plane is greater than the width of the projection of the material guide groove on the horizontal plane, and there is a gap between the end of the baffle plate 51 away from the inner wall of the separation cylinder 2 and the screen 3;

[0048] The bottom surface of the guide trough is inclined toward the direction of the discharge port 23;

[0049] Since the gas jet 421 will eject gas and blow the raw materials away, the raw materials above the screen 3 will fly and float in the space. At this time, a baffle 51 is installed above the material guide trough to block the opening of the material guide trough to prevent the raw materials flying and floating in the space from directly falling into the material guide trough, so that the raw materials that originally passed the screen 3 and met the requirements are accidentally classified as raw materials that do not meet the requirements, resulting in unnecessary production losses and affecting the classification effect of the purification equipment on the spherical silicon powder;

[0050] At the same time, the bottom surface of the material guide trough is set at an angle, and the vibration generated by the vibration motor 21 can further promote and accelerate the movement of raw materials entering the material guide trough, making it convenient for the raw materials in the material guide trough to reach the discharge port 23, and then allowing this part of the raw materials to be discharged from the discharge port 23, thereby avoiding the accumulation of raw materials in the material guide trough and affecting the normal operation of the purification equipment.

[0051] As an embodiment of the present invention, the end of the baffle 51 away from the separation cylinder 2 is installed with fluff 52, and the fluff 52 is located in the gap between the baffle 51 and the screen 3;

[0052] The fluff 52 is used to block and seal the gap between the baffle 51 and the screen 3, thereby improving the effect of blocking the opening of the material guide trough, and fully preventing flying and floating raw materials from entering the material guide trough through the gap between the baffle 51 and the screen 3, resulting in loss of qualified raw materials and affecting the grading and purification effect.

[0053] As an embodiment of the present invention, a material dividing plate 6 is installed on the top cover 25, and the material dividing plate 6 is located directly below the feed inlet 26, and the middle position of the material dividing plate 6 is arched upward;

[0054] When the raw materials are added into the separation cylinder 2 from the feed port 26, the raw materials are relatively gathered together and not dispersed. Then, when the raw materials fall onto the upper net, the distribution range of the raw materials on the screen 3 will be relatively small, thereby affecting the screening and grading efficiency of the screen 3 for the raw materials. At the same time, when the amount of raw materials added at a single time is relatively large, too much raw material will accumulate on the screen 3, which will also cause the screen 3 to be blocked by accumulation, affecting the normal use of the purification equipment. Therefore, a dividing plate 6 is installed directly below the feed port 26, so that the raw materials entering from the feed port 26 will first contact the dividing plate 6, and then be affected by the shape of the dividing plate 6 itself, so that the raw materials are relatively dispersed, and the distribution area of ​​the raw materials when they fall onto the screen 3 is increased, thereby effectively avoiding the local accumulation of raw materials on the screen 3, and through the relatively large distribution area of ​​the raw materials on the screen 3, it is convenient for the screen 3 to screen the raw materials, thereby accelerating the screening efficiency and screening effect.

[0055] As an embodiment of the present invention, a bracket 61 is installed in the feed port 26, an elastic rod 62 is installed on the bracket 61, and the other end of the elastic rod 62 is connected to the dividing plate 6;

[0056] Since the dividing plate 6 is installed by the elastic rod 62, when the raw material falls and contacts the dividing plate 6, the dividing plate 6 will vibrate and shake, which promotes the dispersion and uniform distribution of the raw material on the dividing plate 6, and makes the raw materials falling on the screen 3 relatively dispersed and have a large distribution area, thereby ensuring that the screen 3 has a high screening efficiency for the raw materials. At the same time, with the impact of the raw materials and the vibration generated by the vibration motor 21, after the raw materials fall onto the dividing plate 6, the dividing plate 6 will promote the falling of the raw materials, avoiding the situation where the raw materials are intercepted and blocked by the dividing plate 6, thereby ensuring that the raw materials can fall smoothly onto the screen 3, and preventing the raw materials from piling up at the discharge port and causing blockage.

[0057] As an embodiment of the present invention, a protrusion 63 is provided at the edge of the material dividing plate 6, and the material dividing plate 6 is connected to the elastic rod 62 via a ball shaft, and the friction force of the ball shaft is relatively large;

[0058] By setting the protrusion 63, the falling speed of the raw material will be paused and impacted when the raw material reaches the edge of the dividing plate 6, thereby facilitating the spreading of the raw material on the dividing plate 6 and improving the dispersion and uniform distribution of the raw material. At the same time, in extreme cases, when the raw material is blocked above the dividing plate 6 and at the feed inlet 26, as the amount of raw material increases, the force of the raw material on each part of the dividing plate 6 changes: the force of the raw material on the dividing plate 6 is unbalanced, and the dividing plate 6 tends to tilt and shift to one side. As a result, under the action of the ball shaft, the dividing plate 6 is deflected, increasing the gap between the dividing plate 6 and the discharge port, facilitating the falling of the accumulated raw materials, and ensuring the normal use of the purification equipment.

[0059] The specific workflow is as follows:

[0060] During operation, the staff starts the vibration motor 21 and the drive motor 27 in sequence through the controller, and then feeds the spherical silicon micropowder raw material to be processed from the feed port 26 into the separation cylinder 2, so that the raw material falls onto the screen 3. At this time, under the action of the vibration motor 21, the separation cylinder 2 and the screen 3 inside will vibrate, so that the raw material is screened and purified: the spherical silicon micropowder that meets the requirements passes through the screen 3 and falls onto the bottom plate 31, and then is discharged and collected from the discharge port 24, and the spherical silicon micropowder that does not meet the requirements stays above the screen 3, and then is discharged and collected from the discharge port 1 23;

[0061] At the same time, when the raw material is screened by the screen 3, the upper rod 42 and the lower rod 41 installed on both sides of the screen 3 will rotate under the drive of the driving motor 27, thereby stirring the raw material falling on the screen 3;

[0062] At the same time, since the upper rod 42 and the lower rod 41 are respectively provided with corresponding blowing grooves 411 and receiving grooves 426, the gas passing through the screen 3 from bottom to top will impact, clean and dredge the meshes on the screen 3;

[0063] At the same time, since the upper rod 42 is provided with an arc plate 424 and an impact plate 422, the raw materials on the screen 3 will be scooped up during the rotation of the upper rod 42, so that the raw materials are in contact with the gas blown from the air jet 421, and then the raw materials are blown away and impacted onto the impact plate 422. In this process, the blown away raw materials will impact onto the impact plate 422, so that the raw materials are dispersed mutually.

[0064] When the gas is ejected from the jet port 421, the elastic sheet 425 on the upper rod 42 is impacted, so that the elastic sheet 425 is deformed back and forth under its own elastic action, and when the elastic sheet 425 is deformed by the impact, the elastic sheet 425 contacts and impacts the surface of the impact plate 422. In this process, the elastic sheet 425 that reciprocates and contacts the impact plate 422 squeezes and impacts the raw materials that contact the impact plate 422, so that the relatively compact raw materials that are agglomerated and agglomerated are broken and dispersed.

[0065] At the same time, a stopper 423 is provided on the surface of the impact plate 422 so that the blown raw materials will be blocked by the stopper 423 after contacting the impact plate 422;

[0066] At the same time, a guide trough is provided so that the guide trough is distributed around the screen 3. After the screen 3 screens out the spherical silicon micropowder that does not meet the requirements, the spherical silicon micropowder that does not meet the requirements can fall from the edge of the screen 3 into the guide trough relatively quickly, and then reach the discharge port 23 in the guide trough and be discharged;

[0067] A baffle 51 is installed above the material guide trough so that the opening of the material guide trough is blocked to prevent the flying and floating raw materials in the space from falling directly into the material guide trough, so that the raw materials that originally passed the screen 3 and met the requirements are accidentally classified as raw materials that do not meet the requirements;

[0068] At the same time, the bottom surface of the guide trough is inclined, and the vibration generated by the vibration motor 21 can further promote and accelerate the movement of the raw materials entering the guide trough, making it convenient for the raw materials in the guide trough to reach the discharge port 23;

[0069] The gap between the baffle plate 51 and the screen 3 is blocked and sealed by the fluff 52, thereby improving the effect of blocking the opening of the guide trough;

[0070] A dividing plate 6 is installed directly below the feed port 26, so that the raw materials entering the feed port 26 will first contact the dividing plate 6, and then be affected by the shape of the dividing plate 6 itself, so that the raw materials are relatively dispersed, and the distribution area of ​​the raw materials when they fall on the screen 3 is increased;

[0071] Since the dividing plate 6 is installed by the elastic rod 62, when the raw material falls and contacts the dividing plate 6, the dividing plate 6 will vibrate and shake, which promotes the dispersion and uniform distribution of the raw material on the dividing plate 6. At the same time, the impact of the raw material and the vibration generated by the vibration motor 21 will make the raw material fall onto the dividing plate 6, and the dividing plate 6 will promote the falling of the raw material to avoid the situation where the raw material is intercepted and blocked by the dividing plate 6.

[0072] By setting the protrusion 63, the falling speed of the raw materials will be paused and impacted when the raw materials reach the edge of the dividing plate 6, thereby facilitating the spreading of the raw materials on the dividing plate 6. At the same time, in extreme cases, when the raw materials are blocked above the dividing plate 6 and at the feed port 26, as the amount of raw materials increases, the force of the raw materials on various parts of the dividing plate 6 changes: the force of the raw materials on the dividing plate 6 is unbalanced, and the dividing plate 6 tends to tilt and shift to one side. As a result, under the action of the ball shaft, the dividing plate 6 is deflected, increasing the gap between the dividing plate 6 and the discharge port, facilitating the falling of the accumulated raw materials.

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A grading and purification device for spherical silicon micropowder, comprising a base (1), a positioning rod (11) being mounted on the base (1), a separation cylinder (2) being mounted on the positioning rod (11), a spring (12) being mounted between the separation cylinder (2) and the positioning rod (11), a vibration motor (21) being mounted at the bottom of the separation cylinder (2), a screen (3) and a bottom plate (31) being mounted inside the separation cylinder (2), a feed port (26) being mounted on a top cover (25) of the separation cylinder (2), a discharge port 1 (23) and a discharge port 2 (24) being mounted on a side wall of the separation cylinder (2), the discharge port 1 (23) being located above the screen (3), and the discharge port 2 (24) being located above the bottom plate (31); Features: A rotating shaft (32) is installed on the bottom plate (31), and the rotating shaft (32) is driven by a driving motor (27). A scraper rod (4) is installed on the rotating shaft (32), and the scraper rod (4) comprises an upper rod (42) and a lower rod (41) located on both sides of the screen (3). The rotating shaft (32) is hollow inside, and an air pipe (22) is installed at the lower end of the rotating shaft (32). An air blowing groove (411) is provided on the lower rod (41), and the air blowing groove (411) sprays out the gas transported by the air pipe (22). A receiving groove (426) and an air jet (421) are provided on the upper rod (42), and the receiving groove (426) corresponds to the air blowing groove (411). The lower end of the upper rod (42) is installed with an arc plate (424), the upper end of the upper rod (42) is installed with an impact plate (422), the jet port (421) is located between the arc plate (424) and the impact plate (422), and the outlet direction of the jet port (421) is inclined to point toward the impact plate (422); A material dividing plate (6) is installed on the top cover (25), and the material dividing plate (6) is located directly below the feed inlet (26), and the middle position of the material dividing plate (6) is arched upwards; A bracket (61) is installed in the feed port (26), an elastic rod (62) is installed on the bracket (61), and the other end of the elastic rod (62) is connected to the material distribution plate (6); A protrusion (63) is provided at the edge of the material dividing plate (6), and the material dividing plate (6) and the elastic rod (62) are connected via a ball shaft.

2. The spherical silicon powder classification and purification device according to claim 1, characterized in that: An elastic sheet (425) is installed on the upper rod (42), and the elastic sheet (425) is located between the jet port (421) and the impact plate (422); A stopper (423) is provided on the side of the impact plate (422) facing the air jet port (421).

3. The grading and purification equipment for spherical silicon powder according to claim 1, characterized in that: A fixing ring (5) is installed on the inner wall of the separation cylinder (2), and the screen (3) is fixedly installed on the fixing ring (5). A material guide groove is provided on the fixing ring (5), and the material guide groove is located between the edge of the screen (3) and the inner wall of the separation cylinder (2). The discharge port (23) is connected to the material guide groove.

4. The spherical silicon powder classification and purification device according to claim 3, characterized in that: A baffle (51) is installed on the inner wall of the separation cylinder (2), the baffle (51) is located above the material guide groove, and the cross section of the baffle (51) is arc-shaped; The width of the projection of the baffle plate (51) on the horizontal plane is greater than the width of the projection of the material guide groove on the horizontal plane, and there is a gap between the end of the baffle plate (51) away from the inner wall of the separation cylinder (2) and the screen (3); The bottom surface of the material guide trough is inclined toward the direction of the discharge port 1 (23).

5. The grading and purification equipment for spherical silicon powder according to claim 4, characterized in that: The end of the baffle (51) away from the separation cylinder (2) is provided with fluff (52), and the fluff (52) is located in the gap between the baffle (51) and the screen (3).

Images