Efficient powder grader

Abstract

The invention discloses an efficient powder grader which comprises a grader shell, a grader feeding port is formed in the upper end of the grader shell, an inner cylinder is arranged on the lower portion of the grader shell, a grading wheel is rotationally installed in the grader shell, and a sealing mechanism is arranged between the lower end of the grading wheel and an opening in the upper end of the inner cylinder. The grading wheel is located below a feeding port of the grading machine, gaps are formed between the inner cylinder and the grading machine shell and between the grading wheel and the grading machine shell, an air inlet mechanism right opposite to the peripheral face of the grading wheel is arranged on the grading machine shell, the grading wheel comprises an upper disc body and a lower annular body, a material throwing disc is further fixedly installed on the upper surface of the upper disc body, and the lower annular body is fixedly installed on the lower surface of the lower annular body. The material throwing disc is right opposite to a feeding port of the grader, and a material scattering ring located above the air inlet mechanism is further fixedly installed on the grader shell. By means of an upper feeding and lower discharging mode, the production process of material particles is smoother under the action of gravity, and the throughput capacity is effectively improved. And the stock bin is effectively reduced, the equipment installation space is saved, and the equipment manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to a powder classifier. Background Art

[0002] The material handling method of traditional powder classifiers results in poor fluidity of material particles, and the transmission and processing inside the equipment are not smooth and efficient, which greatly limits the throughput of the production line and makes it difficult to meet the needs of large-scale efficient production. Especially when connected to large-scale crushing equipment, the traditional layout requires a buffer silo to be set up between the two. This connection method not only increases the equipment footprint and material flow links, but the existence of the buffer silo further reduces the material transmission efficiency, making it impossible to achieve rapid and continuous classification of materials, and it is difficult to adapt to the requirements of modern large-scale production for high efficiency, low cost, and high throughput. Summary of the invention

[0003] In order to make up for the above shortcomings, the present invention provides a high-efficiency powder classifier that improves the fluidity and classification efficiency of material particles.

[0004] The technical solution of the present invention is: a high-efficiency powder classifier, comprising a classifier housing, the upper end of the classifier housing is provided with a classifier feed port, the lower part of the classifier housing is provided with an inner cylinder, a classifier wheel is rotatably installed in the classifier housing, a sealing mechanism is provided between the lower end of the classifier wheel and the upper end opening of the inner cylinder, the classifier wheel is located below the classifier feed port, gaps are provided between the inner cylinder and the classifier housing, and between the classifier wheel and the classifier housing, an air inlet mechanism is provided on the classifier housing facing the outer peripheral surface of the classifier wheel, a partition is provided in the inner cylinder, and the partition separates the inner cylinder The inner cavity of the body is divided into a discharge cavity located at the upper part and an installation cavity located at the lower part, the discharge cavity is connected with a fine powder outlet, and the gap is connected with a coarse powder discharge port; the grading wheel comprises an upper disc body and a lower annular body, grading blades are arranged between the upper disc body and the lower annular body, a material throwing disc is also fixedly installed on the upper surface of the upper disc body, the material throwing disc is directly opposite to the classifier feed port, a bulk material ring located above the air inlet mechanism is also fixedly installed on the classifier housing, the material throwing disc comprises a disc body, a guide plate installation groove is arranged on the disc body, a guide plate is movably installed in the guide plate installation groove, and a position adjustment mechanism is arranged between the guide plate and the disc body.

[0005] As a preferred technical solution, the air inlet mechanism includes an air inlet opened on the classifier housing and surrounding the classifying wheel, a plurality of air guide plates are installed on the air inlet at intervals, the gap between the outer ends of adjacent air guide plates is larger than the gap between the inner ends, the air inlet mechanism also includes an annular air inlet shell surrounding the air inlet, the inner cavity of the annular air inlet shell and the air inlet are connected to each other, a shell air inlet is provided on the annular air inlet shell, an air inlet pipe is installed on the shell air inlet, and the axis of the air inlet pipe is along the tangent direction of the annular air inlet shell; the cross-sectional area of ​​the inner cavity of the annular air inlet shell decreases from the shell air inlet in a clockwise or counterclockwise direction.

[0006] As a preferred technical solution, the inner circumferential surface of the bulk material ring is provided with a plurality of bulk material protrusions, the bulk material protrusions are in strip shape, and each of the bulk material protrusions extends in a spiral.

[0007] As a preferred technical solution, an adjustment mechanism is installed in the annular air inlet shell, and the adjustment mechanism includes a plurality of adjustment plates facing the air inlet, and a rotating shaft is fixedly installed at the upper and lower ends of the adjustment plate. A rotation drive mechanism is provided between the rotating shaft and the annular air inlet shell, and the rotating shaft is located on the center line of the adjustment plate, and the distance between two adjacent rotating shafts is less than the length of the adjustment plate.

[0008] As a preferred technical solution, the position adjustment mechanism includes a fixing bolt and a mounting screw hole opened at the bottom of the guide plate mounting groove, the guide plate is provided with a through hole matching the mounting screw hole, and the fixing bolt passes through the through hole and is screwed onto the mounting screw hole.

[0009] As a preferred technical solution, a lower baffle is fixedly installed at the lower end of the inner cylinder, a rotating shaft sleeve is fixedly installed in the inner cylinder, a grading wheel rotating shaft is rotatably installed in the rotating shaft sleeve, the grading wheel is fixedly installed on the grading wheel rotating shaft, the lower end of the rotating shaft sleeve is detachably fixedly installed on the lower baffle, a through hole is provided on the partition for the rotating shaft sleeve to pass through, an external thread is provided on the outer circumferential surface of the rotating shaft sleeve, a support nut is screwed on the external thread, and the lower end surface of the support nut is against the upper surface of the partition.

[0010] As a preferred technical solution, the sealing mechanism includes a mounting groove arranged at the upper end of the inner cylinder, a lower annular seat is fixedly mounted on the mounting groove, a plurality of annular sealing grooves are arranged on the upper surface of the lower annular seat, an annular sealing protrusion cooperating with the annular sealing groove is arranged on the lower end surface of the lower annular body, a sealing gap is arranged between the annular sealing protrusion and the annular sealing groove, a vent hole connected with the sealing gap and the mounting groove is opened on the lower annular seat, a ventilation pipe connected with the mounting groove is fixedly mounted on the classifier housing, and the ventilation pipe is connected with an air filter.

[0011] As a preferred technical solution, a grading wheel shaft driving mechanism for driving the grading wheel shaft to rotate is installed on the classifier housing, and the grading wheel shaft driving mechanism includes a mounting base fixedly installed on the classifier housing, a swing plate hinged at the left end of the mounting base, a distance adjustment mechanism is provided between the swing plate and the right end of the mounting base, and the distance adjustment mechanism includes a swing rod hinged at the right end of the mounting base, the swing rod is provided with an external thread, an adjustment through hole is provided on the swing plate that matches the swing rod clearance, the swing rod passes through the adjustment through hole, and the swing rod is screwed with a first nut and a second nut located on both sides of the swing plate; a grading wheel shaft driving motor is fixedly installed on the swing plate.

[0012] Due to the adoption of the above technical scheme, a high-efficiency powder classifier comprises a classifier housing, a classifier feed port is arranged at the upper end of the classifier housing, an inner cylinder is arranged at the lower part of the classifier housing, a classifier wheel is rotatably installed in the classifier housing, a sealing mechanism is arranged between the lower end of the classifier wheel and the upper end opening of the inner cylinder, the classifier wheel is located below the classifier feed port, gaps are arranged between the inner cylinder and the classifier housing, and between the classifier wheel and the classifier housing, an air inlet mechanism facing the outer peripheral surface of the classifier wheel is arranged on the classifier housing, a partition is arranged in the inner cylinder, and the partition divides the inner cavity of the inner cylinder into a discharge cavity located at the upper part and a storage cavity located at the lower part. The discharging cavity is connected with a fine powder outlet, and the gap is connected with a coarse powder outlet; the grading wheel includes an upper disc body and a lower annular body, and grading blades are arranged between the upper disc body and the lower annular body. A material throwing disc is also fixedly installed on the upper surface of the upper disc body, and the material throwing disc is directly opposite to the classifier feed port. A bulk material ring located above the air inlet mechanism is also fixedly installed on the classifier housing, and the material throwing disc includes a disc body, and a guide plate mounting groove is arranged on the disc body, and a guide plate is movably installed in the guide plate mounting groove, and a position adjustment mechanism is arranged between the guide plate and the disc body; by using the upper feeding and lower discharging method, the production process of material particles is smoother under the action of gravity, and the throughput is effectively improved. It also effectively reduces the silo, saves equipment installation space, and reduces equipment cost; by changing the position of the guide plate, the guide plate can be closer to or farther away from the bulk material ring, thereby changing the material dispersion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 AA section view in the figure;

[0015] Figure 3 yes Figure 1 A partial enlarged view of point I in the middle;

[0016] Figure 4 yes Figure 3 A partial enlarged view of position II in the middle;

[0017] Figure 5 is a schematic structural diagram of a grading wheel in an embodiment of the present invention;

[0018] Figure 6 Schematic diagram of the working principle of the position adjustment mechanism in an embodiment of the present invention;

[0019] Figure 7 1 is a top view of the material throwing tray in an embodiment of the present invention;

[0020] Figure 8 is a cross-sectional view of a bulk material ring according to an embodiment of the present invention;

[0021] Fig. 9 Schematic diagram of the structure of the distance adjustment mechanism in the embodiment of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1 , Figure 5As shown, a high-efficiency powder classifier comprises a classifier housing 1, wherein the upper end of the classifier housing 1 is provided with a classifier feed port 2, an inner cylinder 3 is fixedly installed at the lower part of the classifier housing 1, a classifier wheel 4 is rotatably installed in the classifier housing 1, a sealing mechanism is provided between the lower end of the classifier wheel 4 and the upper end opening of the inner cylinder 3, the classifier wheel 4 is located below the classifier feed port 2, gaps 5 are provided between the inner cylinder 3 and the classifier housing 1, and between the classifier wheel 4 and the classifier housing 1, an air inlet mechanism is provided on the classifier housing 1 facing the outer circumference of the classifier wheel 4, a partition 6 is provided in the inner cylinder 3, and the partition 6 divides the inner cavity of the inner cylinder 3 into a gas chamber located at the upper part and a gas chamber located at the lower part. The discharge chamber 7 and the installation chamber 8 at the lower part, the discharge chamber 7 is connected with a fine powder outlet 9, the gap 5 is connected with a coarse powder discharge port 10; the grading wheel 4 includes an upper disc body 11 and a lower annular body 12, a grading blade 13 is arranged between the upper disc body 11 and the lower annular body 12, a material throwing disc is fixedly installed on the upper surface of the upper disc body 11, the material throwing disc is directly opposite to the classifier feed port 2, the classifier housing 1 is also fixedly installed with a bulk ring 15 located above the air inlet mechanism, the material throwing disc includes a disc body 14, the disc body 14 is provided with a guide plate installation groove 43, a guide plate 16 is movably installed in the guide plate installation groove 43, and a position adjustment mechanism is arranged between the guide plate 16 and the disc body 14. The high-efficiency classifier uses the method of upper feeding and lower discharging, and the production process of material particles is smoother under the action of gravity, which effectively improves the throughput. By changing the position of the guide plate through the position adjustment mechanism, the guide plate can be brought closer to or farther away from the bulk material ring, thereby changing the material dispersion effect.

[0023] like Figure 1 and Figure 2As shown, the air inlet mechanism includes an air inlet 17 opened on the classifier housing 1 and surrounding the classifying wheel 4, a plurality of air guide plates 18 are installed at intervals on the air inlet 17, the gap between the outer ends of adjacent air guide plates 18 is larger than the gap between the inner ends, the air inlet mechanism also includes an annular air inlet housing 19 surrounding the air inlet 17, the inner cavity of the annular air inlet housing 19 and the air inlet 17 are connected to each other, the annular air inlet housing 19 is provided with a housing air inlet, the housing air inlet is installed with an air inlet pipe 20, the axis of the air inlet pipe 20 is along the tangent direction of the annular air inlet housing 19; the inner cavity cross-sectional area of ​​the annular air inlet housing 19 decreases from the housing air inlet in a clockwise or counterclockwise direction. In order to keep the wind force at each place of the air inlet the same, the air inlet adopts tangential vortex air inlet, and the inner cavity cross-sectional area of ​​the annular air inlet housing decreases from the housing air inlet in a clockwise or counterclockwise direction. Therefore, when the airflow moves along the annular air inlet shell, the wind speed will gradually increase, avoiding attenuation. The negative pressure suction force generated by the induced draft fan is evenly distributed in the circumferential direction of the classification area through the air inlet, and the wind force fully blows away the powder particle group, thereby effectively improving the classification efficiency.

[0024] like Figure 8 As shown, the inner circumferential surface of the bulk material ring 15 is provided with a plurality of bulk material protrusions 21 , the bulk material protrusions 21 are in strip shape, and each of the bulk material protrusions 21 extends in a spiral.

[0025] like Figure 2 As shown, an adjustment mechanism is installed in the annular air inlet housing 1, and the adjustment mechanism includes a plurality of adjustment plates 23 facing the air inlet 17, and a rotating shaft 22 is fixedly installed at the upper and lower ends of the adjustment plate 17. A rotation drive mechanism is provided between the rotating shaft 22 and the annular air inlet housing 19, and the rotating shaft 22 is located at the center line of the adjustment plate 23, and the distance between two adjacent rotating shafts 22 is less than the length of the adjustment plate 23. By rotating the rotating shaft to change the angle of the adjustment plate, the direction of the airflow can be guided, thereby further adjusting the airflow moving in the annular air inlet housing. The rotation drive mechanism can be an electric motor or the like.

[0026] like Figure 6 and Figure 7 As shown, the position adjustment mechanism includes a fixing bolt 24 and a mounting screw hole opened at the bottom of the guide plate installation groove, and a through hole matching the mounting screw hole is provided on the guide plate 16, and the fixing bolt 24 passes through the through hole and is screwed on the mounting screw hole. The position of the guide plate in the guide plate installation groove is changed, and then the fixing bolt is installed on the mounting screw hole to fix the position of the guide plate. By changing the position of the guide plate, the guide plate can be closer to or farther away from the bulk ring, thereby changing the material dispersion effect.

[0027] like Figure 1 As shown, a lower baffle 25 is fixedly installed at the lower end of the inner cylinder 3, a rotating shaft sleeve 26 is fixedly installed in the inner cylinder 3, a grading wheel rotating shaft 27 is rotatably installed in the rotating shaft sleeve 26, the grading wheel 4 is fixedly installed on the grading wheel rotating shaft 27, the lower end of the rotating shaft sleeve 26 is detachably fixedly installed on the lower baffle 25, a through hole for the rotating shaft sleeve 26 to pass through is provided on the partition 6, an external thread is provided on the outer circumferential surface of the rotating shaft sleeve 26, a support nut 28 is screwed on the external thread, and the lower end surface of the support nut 28 is against the upper surface of the partition 6.

[0028] like Figure 3 and Figure 4 As shown, the sealing mechanism includes a mounting groove 29 arranged at the upper end of the inner cylinder 3, a lower annular seat 30 is fixedly mounted on the mounting groove 29, a plurality of annular sealing grooves 31 are arranged on the upper surface of the lower annular seat 30, an annular sealing protrusion 32 matching the annular sealing groove 31 is arranged on the lower end surface of the lower annular body 12, a sealing gap is arranged between the annular sealing protrusion 32 and the annular sealing groove 31, a vent hole 34 communicating with the sealing gap and the mounting groove 29 is opened on the lower annular seat 30, a vent pipe 35 communicating with the mounting groove 29 is fixedly mounted on the classifier housing 1, and the vent pipe 35 is connected to an air filter 36. Under the action of the fan, external air enters the air filter and enters the mounting groove 29 through the vent pipe 35. The air enters the sealing gap through the vent hole 35, and the air flow is blown out from the sealing gap to prevent particles from entering.

[0029] like Figure 1 and Fig. 9 As shown, a grading wheel shaft driving mechanism for driving the grading wheel shaft 27 to rotate is installed on the grading machine housing 1, and the grading wheel shaft driving mechanism includes a mounting seat 37 fixedly mounted on the grading machine housing 1, a swing plate 38 hinged at the left end of the mounting seat 37, and a distance adjustment mechanism is provided between the swing plate 38 and the right end of the mounting seat 37, and the distance adjustment mechanism includes a swing rod 39 hinged at the right end of the mounting seat 37, and the swing rod 39 is provided with an external thread, and the swing plate is provided with an adjustment through hole with a clearance fit with the swing rod 39, and the swing rod 39 passes through the adjustment through hole and the first nut 40 and the second nut 41 located on both sides of the swing 38 plate are screwed on the swing rod 39; a grading wheel shaft driving motor 42 is fixedly installed on the swing plate 38. By changing the length of the swing rod extending out of the adjustment through hole, the angle and distance between the swing plate 38 and the mounting seat 37 can be adjusted, thereby adjusting the position of the grading wheel shaft driving motor 42, thereby ensuring the efficiency of the belt transmission between the grading wheel shaft driving motor and the grading wheel shaft.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency powder classifier, characterized in that: The present invention comprises a classifier housing, wherein the upper end of the classifier housing is provided with a classifier feed port, the lower part of the classifier housing is provided with an inner cylinder, a classifier wheel is rotatably installed in the classifier housing, a sealing mechanism is provided between the lower end of the classifier wheel and the upper end opening of the inner cylinder, the classifier wheel is located below the classifier feed port, gaps are provided between the inner cylinder and the classifier housing, and between the classifier wheel and the classifier housing, an air inlet mechanism facing the outer peripheral surface of the classifier wheel is provided on the classifier housing, a partition is provided in the inner cylinder, and the partition divides the inner cylinder cavity into a gas inlet located at the upper part and a gas inlet located at the lower part. A discharge chamber and an installation chamber located at the lower part, the discharge chamber is connected with a fine powder outlet, and the gap is connected with a coarse powder discharge port; the grading wheel comprises an upper disc body and a lower annular body, grading blades are arranged between the upper disc body and the lower annular body, a material throwing disc is also fixedly installed on the upper surface of the upper disc body, the material throwing disc is directly opposite to the classifier feed port, a bulk material ring located above the air inlet mechanism is also fixedly installed on the classifier housing, the material throwing disc comprises a disc body, a guide plate installation groove is arranged on the disc body, a guide plate is movably installed in the guide plate installation groove, and a position adjustment mechanism is arranged between the guide plate and the disc body.

2. The high-efficiency powder classifier according to claim 1, characterized in that: The air inlet mechanism includes an air inlet surrounding the classifying wheel and opened on the classifier housing, a plurality of air guide plates are installed on the air inlet at intervals, the gap between the outer ends of adjacent air guide plates is larger than the gap between the inner ends, the air inlet mechanism also includes an annular air inlet shell surrounding the air inlet, the inner cavity of the annular air inlet shell and the air inlet are connected to each other, a shell air inlet is provided on the annular air inlet shell, an air inlet pipe is installed on the shell air inlet, and the axis of the air inlet pipe is along the tangent direction of the annular air inlet shell; the cross-sectional area of ​​the inner cavity of the annular air inlet shell decreases from the shell air inlet in a clockwise or counterclockwise direction.

3. The high-efficiency powder classifier according to claim 1, characterized in that: The inner circumferential surface of the bulk material ring is provided with a plurality of bulk material protrusions, the bulk material protrusions are in strip shape, and each of the bulk material protrusions extends in a spiral.

4. The high-efficiency powder classifier according to claim 1, characterized in that: An adjustment mechanism is installed in the annular air inlet shell, and the adjustment mechanism includes a plurality of adjustment plates facing the air inlet, and a rotating shaft is fixedly installed on the upper and lower ends of the adjustment plates. A rotation drive mechanism is provided between the rotating shaft and the annular air inlet shell, and the rotating shaft is located on the center line of the adjustment plate, and the distance between two adjacent rotating shafts is less than the length of the adjustment plate.

5. The high-efficiency powder classifier according to claim 1, characterized in that: The position adjustment mechanism includes a fixing bolt and a mounting screw hole opened at the bottom of the guide plate mounting groove, the guide plate is provided with a through hole matching the mounting screw hole, and the fixing bolt passes through the through hole and is screwed onto the mounting screw hole.

6. The high-efficiency powder classifier according to claim 1, characterized in that: A lower baffle is fixedly installed on the lower end of the inner cylinder, a rotating shaft sleeve is fixedly installed in the inner cylinder, a grading wheel rotating shaft is rotatably installed in the rotating shaft sleeve, the grading wheel is fixedly installed on the grading wheel rotating shaft, the lower end of the rotating shaft sleeve is detachably fixedly installed on the lower baffle, a through hole is provided on the partition for the rotating shaft sleeve to pass through, an external thread is provided on the outer circumferential surface of the rotating shaft sleeve, a support nut is screwed on the external thread, and the lower end surface of the support nut is against the upper surface of the partition.

7. The high-efficiency powder classifier according to claim 1, characterized in that: The sealing mechanism includes a mounting groove arranged at the upper end of the inner cylinder body, a lower annular seat is fixedly mounted on the mounting groove, a plurality of annular sealing grooves are arranged on the upper surface of the lower annular seat, an annular sealing protrusion cooperating with the annular sealing groove is arranged on the lower end surface of the lower annular body, a sealing gap is arranged between the annular sealing protrusion and the annular sealing groove, a vent hole connected with the sealing gap and the mounting groove is opened on the lower annular seat, a ventilation pipe connected with the mounting groove is fixedly mounted on the classifier housing, and the ventilation pipe is connected with an air filter.

8. The high-efficiency powder classifier according to any one of claims 1 to 7, characterized in that: A grading wheel shaft driving mechanism for driving the grading wheel shaft to rotate is installed on the classifier housing, the grading wheel shaft driving mechanism includes a mounting seat fixedly installed on the classifier housing, a swing plate hinged at the left end of the mounting seat, a distance adjustment mechanism is provided between the swing plate and the right end of the mounting seat, the distance adjustment mechanism includes a swing rod hinged at the right end of the mounting seat, the swing rod is provided with an external thread, an adjustment through hole is provided on the swing plate to match the swing rod clearance, the swing rod passes through the adjustment through hole and a first nut and a second nut located on both sides of the swing plate are screwed on the swing rod; a grading wheel shaft driving motor is fixedly installed on the swing plate.

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