Efficient grader

Abstract

The utility model discloses an efficient grader which comprises a rack, an outer shell is installed on the rack, a grading wheel is arranged on the upper portion of the outer shell, an inner shell is fixedly installed on the lower portion of the outer shell, an inner shell feeding port is formed in the middle of the upper end of the inner shell, and a rotary sealing mechanism is arranged between a lower installation ring of the grading wheel and the upper end of the inner shell. An air inlet mechanism corresponding to the grading wheel is further arranged on the outer shell, a feeding port located above the upper end plate is formed in the upper portion of the outer shell, the lower end of the inner shell is closed and connected with a negative pressure induced draft fan, materials are added from the top feeding port and fall onto an inverted cone rotating synchronously with the grading wheel, and the inverted cone rotates to throw the materials to the inner wall of the outer shell. Fine particles adsorbed on the large particles are vibrated and scattered, meanwhile, agglomerated false particles are also vibrated and scattered, the vibrated and scattered materials fall into a grading area of the grading wheel under the action of gravity, the fine powder particles overcome centrifugal force generated by rotation of the grading wheel under the action of negative pressure gravity, penetrate through blades of the grading wheel and are separated out, and the grading efficiency is high.

Description

Technical Field

[0001] The utility model relates to a classifier. Background Art

[0002] In the field of material grading, classifiers play a vital role. While there are a wide variety of classifiers on the market, some common issues exist. Traditional classifiers have limitations in their feeding and discharging methods. Most classifiers use a bottom-feed and top-discharge method, which can easily lead to material accumulation and blockage, affecting grading efficiency. The flow of material within the classifier is easily obstructed, resulting in a low volume of material that can be processed per unit time, making it impossible to meet the needs of large-scale production. Utility Model Content

[0003] In order to make up for the above shortcomings, the present invention provides a high-efficiency classifier that can effectively utilize gravity, improve the smoothness of material particle movement, and improve classification efficiency.

[0004] The technical solution of the utility model is: a high-efficiency classifier, comprising a frame, an outer shell is mounted on the frame, a classifying wheel is provided on the upper part of the outer shell, an upper gap is provided between the outer circumference of the classifying wheel and the upper part of the outer shell, an inner shell is fixedly mounted on the lower part of the outer shell, a lower gap is provided between the outer circumference of the inner shell and the outer shell, an inner shell feed port is opened in the middle part of the upper end of the inner shell, the classifying wheel comprises an upper end plate and a lower mounting ring, classifying blades are provided between the upper end plate and the lower mounting ring, a rotating sealing mechanism is provided between the lower mounting ring of the classifying wheel and the upper end of the inner shell, the center hole of the lower mounting ring and the inner shell feed port are communicated with each other, the upper gap and the lower gap are communicated with each other, an air inlet mechanism corresponding to the classifying wheel is further provided on the outer shell, a feed port located above the upper end plate is provided on the upper part of the outer shell, the lower end of the inner shell is closed and connected to a negative pressure induced draft fan, a coarse powder discharge port communicated with the lower gap is provided at the lower end of the outer shell, and a rotating drive mechanism is further provided between the classifying wheel and the frame.

[0005] As a preferred technical solution, an inverted cone is fixedly mounted on the upper surface of the upper end plate.

[0006] As a preferred technical solution, bulk sheets are fixedly mounted on the conical surface of the inverted cone.

[0007] As a preferred technical solution, the upper edge of the bulk piece extends obliquely toward the small end of the inverted cone or the upper edge of the bulk piece is parallel to the upper end plate.

[0008] As a preferred technical solution, an inverted conical shell is provided on the upper portion of the outer shell and is located above the upper end plate, and the feed port is opened at the small end of the inverted conical shell.

[0009] As a preferred technical solution, a bulk material ring is fixedly mounted on the outer shell, and the large end of the inverted cone is fixedly mounted on the upper end surface of the bulk material ring.

[0010] As a preferred technical solution, the air intake mechanism includes an air intake window fixedly mounted on the outer shell, the air intake window includes an upper ring body and a lower ring body, fan blades are provided between the upper ring body and the lower ring body, and the gap between adjacent fan blades gradually decreases from the outside to the inside, and the air intake window is located below the bulk ring and directly opposite the grading blades.

[0011] As a preferred technical solution, an air inlet shell is installed outside the outer shell, and the air inlet shell surrounds the air inlet window. The inner cavity of the air inlet shell is connected to the air inlet window. An air inlet pipe is installed on the air inlet shell, and the axis of the air inlet pipe is parallel to the tangential direction of the upper ring body; along the direction of airflow flowing in from the air inlet pipe, the cross-sectional area of ​​the inner cavity of the air inlet shell gradually decreases.

[0012] As a preferred technical solution, the rotary sealing mechanism includes a sealing ring fixedly mounted on the lower surface of the lower mounting ring, the lower mounting ring is provided with a blade lower mounting groove, the lower end of the grading blade is inserted into the blade lower mounting groove, the blade lower mounting groove is provided with an opening on the outer peripheral surface of the lower mounting ring, a lower retaining ring for blocking the grading blade is fixedly mounted on the outer peripheral surface of the sealing ring, a plurality of annular sealing protrusions are provided on the lower surface of the sealing ring, and an annular sealing groove cooperating with the annular sealing protrusion is provided on the upper end of the inner shell.

[0013] As an optimal technical solution, a blade mounting groove is provided on the lower surface of the upper end plate, the upper end of the grading blade is clamped in the blade mounting groove, the blade mounting groove is provided with an opening on the outer peripheral surface of the upper end plate, and the large end of the inverted cone is provided with an upper retaining ring for blocking the upper end of the grading blade.

[0014] As a preferred technical solution, the inner shell is provided with an air intake hole connected to the annular sealing groove, and the inner shell is also provided with a sealed air intake cavity connected to the air intake hole, the sealed air intake cavity is connected to an air intake pipe, and the air intake pipe is equipped with an air filter.

[0015] The cam is secured to the upper edge of the frame, and the cam is secured to the lower edge of the frame by a secure coupling between the cam and the frame. The coarse powder discharge port is connected with the gap, and a rotating drive mechanism is also provided between the classifying wheel and the frame; the material is added from the top feed port, and the material falls on the inverted cone that rotates synchronously with the classifying wheel. The rotation of the inverted cone throws the material to the inner wall of the outer shell, and the fine particles adsorbed on the large particles are vibrated and the agglomerated pseudo particles are also vibrated and dispersed. The dispersed material falls to the grading area of ​​the classifying wheel by gravity, and the fine powder particles overcome the centrifugal force generated by the rotation of the classifying wheel under the action of negative pressure gravity and pass through the classifying wheel blades to be separated. The coarseness of the separated fine powder particle size is adjustable, that is, the higher the speed of the classifying wheel, the greater the centrifugal force. When the negative pressure carries the powder particles through, it encounters great resistance. Only the finer particles that obtain kinetic energy overcome the resistance and pass through. Therefore, the higher the speed of the classifying wheel, the finer the classified particle size, and the lower the speed of the classifying wheel, the coarser the classified particle size. The coarse powder falls along the upper gap and the lower gap under the action of gravity and is discharged from the coarse powder discharge port. The grading efficiency is high, and the discharge of the large crusher can be directly connected to the feed port without adding a buffer silo in the middle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 AA section view in the figure;

[0018] Figure 3 yes Figure 1 A partial enlarged view of point I in the middle;

[0019] Figure 4 yes Figure 1 A partial enlarged view of point II in the middle. DETAILED DESCRIPTION

[0020] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a high-efficiency classifier includes a frame 1, an outer shell 2 is installed on the frame 1, a classifying wheel 3 is provided on the upper part of the outer shell 1, an upper gap 4 is provided between the outer circumference of the classifying wheel 3 and the upper part of the outer shell 2, an inner shell 5 is fixedly installed on the lower part of the outer shell 2, a lower gap 6 is provided between the outer circumference of the inner shell 5 and the outer shell 2, an inner shell feed port 7 is opened in the middle of the upper end of the inner shell 5, the classifying wheel 3 includes an upper end plate 8 and a lower mounting ring 9, a classifying blade 10 is provided between the upper end plate 8 and the lower mounting ring 9, and a rotating shaft is provided between the lower mounting ring 9 of the classifying wheel 3 and the upper end of the inner shell 5. The sealing mechanism comprises a central hole 11 of the lower mounting ring 9 and the inner shell feed port 7, and the upper gap 4 and the lower gap 6 are interconnected. The outer shell 2 is also provided with an air inlet mechanism corresponding to the classifying wheel 3. The upper portion of the outer shell 2 is provided with a feed port 12 located above the upper end plate 8. The lower end of the inner shell 5 is sealed and connected to a negative pressure induced draft fan. In this embodiment, an induced draft duct 25 is installed at the lower end of the inner shell, and the induced draft duct is connected to the negative pressure induced draft fan. The lower end of the outer shell 2 is provided with a coarse powder discharge port 13 that communicates with the lower gap 6. A rotation drive mechanism is also provided between the classifying wheel 3 and the frame 1. The rotation drive mechanism includes an electric motor, and the output shaft of the electric motor is connected to the classifying wheel through a belt drive. The upper feeding and lower discharging method improves the smoothness of the material particles under the action of gravity, effectively achieving high throughput and improving classification efficiency. It is particularly suitable for connection and classification operations of large-scale crushing equipment. The discharge of large crushers can be directly connected to this top feed port of the classification without adding a buffer silo.

[0021] like Figure 1 As shown, an inverted cone 34 is fixedly mounted on the upper surface of the upper end plate 8. As the classifying wheel rotates, the inverted cone 34 disperses the materials.

[0022] The material is added from the top feed port 12 and falls onto the inverted cone 34 that rotates synchronously with the classifying wheel. The inverted cone 34 rotates to throw the material to the inner wall of the outer shell 1. The fine particles adsorbed on the large particles are vibrated and the agglomerated pseudo particles are also vibrated and dispersed. The dispersed material falls to the classification area of ​​the classifying wheel 3 by gravity. The fine powder particles overcome the centrifugal force generated by the rotation of the classifying wheel under the action of negative pressure gravity and pass through the classifying wheel blades to be separated. The coarseness of the separated fine powder particle size is adjustable, that is, the higher the speed of the classifying wheel 3, the greater the centrifugal force. When the negative pressure carries the powder particles through, it encounters great resistance. Only the finer particles that obtain kinetic energy overcome the resistance and pass through. Therefore, the higher the speed of the classifying wheel, the finer the classification particle size, and the lower the speed of the classifying wheel, the coarser the classification particle size. The coarse powder falls along the upper gap and the lower gap under the action of gravity and is discharged from the coarse powder discharge port 13.

[0023] like Figure 1 and Figure 3 As shown, in order to further improve the material dispersion effect, a dispersing piece 14 is fixedly installed on the conical surface of the inverted cone 13 .

[0024] like Figure 1 As shown, the upper edge of the bulk piece 14 extends obliquely toward the small end of the inverted cone 13 or the upper edge of the bulk piece 14 is parallel to the upper end plate 8 .

[0025] In order to allow the material to be better acted upon by the bulk pieces, an inverted conical shell 15 located above the upper end plate 8 is provided on the upper portion of the outer shell 2 , and the feed port 12 is opened at the small end of the inverted conical shell 15 .

[0026] like Figure 1 and Figure 3 As shown, a bulk ring 16 is fixedly mounted on the outer shell 2, and the large end of the inverted cone 15 is fixedly mounted on the upper end surface of the bulk ring 16. The inverted cone rotates to throw the material toward the inner wall of the bulk ring, making the material more dispersed.

[0027] like Figure 1 、 Figure 2 and Figure 3 In fact, the air intake mechanism includes an air intake window fixedly mounted on the outer shell 2. The air intake window includes an upper ring body 17 and a lower ring body 18. Slices 19 are provided between the upper ring body 17 and the lower ring body 18. The gaps between adjacent slices 19 gradually decrease from the outside to the inside. The air intake window is located below the bulk ring 16 and directly opposite the grading blades 10. The gaps between adjacent slices 19 gradually decrease from the outside to the inside, thereby gradually accelerating the airflow. Airflow can enter the outer shell through the air intake window.

[0028] like Figure 2 As shown, an air inlet housing 31 is mounted externally to the outer shell. This housing 31 surrounds the air inlet window, and its interior communicates with the window. An air inlet duct 33 is mounted on the housing 31, with its axis parallel to the tangent of the upper ring body 17. The interior cross-sectional area of ​​the housing 31 gradually decreases as air flows from the housing 31 through the inlet duct 33. To maintain consistent wind force around the circumference of the air inlet window, the axis of the inlet duct 33 is parallel to the tangent of the upper ring body 17, achieving tangential vortex air inflow. Furthermore, the interior cross-sectional area of ​​the housing 31 gradually decreases, resulting in a larger inlet area and a smaller tail area. This gradually increases wind speed, maintaining consistent wind force around the air inlet window under the influence of negative pressure. The negative pressure suction generated by the negative pressure induced draft fan generates evenly distributed wind force around the circumference of the air inlet window within the grading area, effectively dispersing the powder particles.

[0029] like Figure 1 and Figure 4 As shown, the rotary sealing mechanism includes a sealing ring 20 fixedly mounted on the lower surface of the lower mounting ring 9. The lower mounting ring 9 is provided with a blade lower mounting groove 21, into which the lower end of the grading blade 10 is inserted. The blade lower mounting groove 21 is provided with an opening on the outer circumference of the lower mounting ring 9. A lower retaining ring 35 is fixedly mounted on the outer circumference of the sealing ring 20 to block the grading blade 10. A plurality of annular sealing protrusions 23 are provided on the lower surface of the sealing ring 20, and an annular sealing groove 24 is provided at the upper end of the inner shell to cooperate with the annular sealing protrusions 23. The provision of the lower retaining ring facilitates the installation of the grading blades. After the grading blade 10 is inserted into the blade lower mounting groove 21, the sealing ring is installed. The lower retaining ring prevents the grading blade from moving out of the blade lower mounting groove 21, thereby improving installation efficiency.

[0030] like Figure 3 As shown, the lower surface of the upper end plate 8 is provided with a blade upper mounting groove, in which the upper end of the grading blade 10 is clamped. The blade upper mounting groove is provided with an opening on the outer peripheral surface of the upper end plate 8, and the large end of the inverted cone 13 is provided with an upper retaining ring 26 that blocks the upper end of the grading blade 10. The upper retaining ring 26 prevents the grading blade 10 from moving out of the upper mounting groove, thereby improving installation efficiency and facilitating disassembly and assembly.

[0031] like Figure 4 As shown, the inner housing 5 is provided with an air intake hole 27 communicating with the annular sealing groove 24. The inner housing 5 is also provided with a sealed air intake cavity 28 communicating with the air intake hole 27. The sealed air intake cavity 28 is connected to an air intake pipe 29, which is equipped with an air filter 30. After being filtered by the air filter, air enters the air intake hole 27 through the air intake cavity, preventing particles from entering the annular sealing groove 24.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency classifier, characterized in that: The cam is secured to the bottom of the cam, and the cam is secured to the bottom of the cam, with an cam being secured to the top of the cam, and the cam is secured to the bottom of the cam.

2. The high-efficiency classifier according to claim 1, characterized in that An inverted cone is fixedly mounted on the upper surface of the upper end plate, and bulk sheets are fixedly mounted on the conical surface of the inverted cone.

3. The high-efficiency classifier according to claim 2, characterized in that: The upper edge of the bulk sheet extends obliquely toward the small end of the inverted cone or the upper edge of the bulk sheet is parallel to the upper end plate.

4. The high-efficiency classifier according to claim 3, characterized in that: An inverted conical shell is provided on the upper portion of the outer shell and is located above the upper end plate. The feed port is opened at the small end of the inverted conical shell.

5. The high-efficiency classifier according to claim 4, characterized in that: A bulk material ring is also fixedly mounted on the outer shell, and the large end of the inverted cone is fixedly mounted on the upper end surface of the bulk material ring.

6. The high-efficiency classifier according to claim 5, characterized in that: The air intake mechanism includes an air intake window fixedly mounted on the outer shell, the air intake window includes an upper ring body and a lower ring body, fan blades are provided between the upper ring body and the lower ring body, and the gap between adjacent fan blades gradually decreases from the outside to the inside. The air intake window is located below the bulk ring and directly opposite the grading blades.

7. The high-efficiency classifier according to claim 6, characterized in that: An air inlet shell is installed outside the outer shell, and the air inlet shell surrounds the air inlet window. The inner cavity of the air inlet shell is connected to the air inlet window. An air inlet pipe is installed on the air inlet shell, and the axis of the air inlet pipe is parallel to the tangent direction of the upper ring body; along the direction of air flow flowing in from the air inlet pipe, the cross-sectional area of ​​the inner cavity of the air inlet shell gradually decreases.

8. The high-efficiency classifier according to claim 1, characterized in that: The rotary sealing mechanism includes a sealing ring fixedly mounted on the lower surface of the lower mounting ring, a blade lower mounting groove is provided on the lower mounting ring, the lower end of the grading blade is inserted into the blade lower mounting groove, the blade lower mounting groove is provided with an opening on the outer peripheral surface of the lower mounting ring, a lower blocking ring for blocking the grading blade is fixedly mounted on the outer peripheral surface of the sealing ring, a plurality of annular sealing protrusions are provided on the lower surface of the sealing ring, and an annular sealing groove cooperating with the annular sealing protrusion is provided on the upper end of the inner shell.

9. The high-efficiency classifier according to claim 2, characterized in that: The lower surface of the upper end plate is provided with a blade upper mounting groove, in which the upper end of the grading blade is clamped, and the blade upper mounting groove is provided with an opening on the outer peripheral surface of the upper end plate, and the large end of the inverted cone is provided with an upper retaining ring for blocking the upper end of the grading blade.

10. The high-efficiency classifier according to claim 8, characterized in that: The inner shell is provided with an air intake hole connected to the annular sealing groove. The inner shell is also provided with a sealed air intake cavity connected to the air intake hole. The sealed air intake cavity is connected to an air intake pipe, and the air intake pipe is equipped with an air filter.

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