CN116871165A - High-precision grader - Google Patents

Abstract

The invention discloses a high-precision classifier which comprises a shell, wherein an upper classifying cavity is formed in the upper part of the shell, an upper classifying wheel is rotatably arranged in the upper classifying cavity, a lower classifying cavity is formed in the lower part of the shell, a lower classifying wheel is rotatably arranged in the lower classifying cavity, a buffer cavity is further formed in the shell, a lower discharging shell is arranged at the lower part of the shell, a lower fine material outlet is formed in the lower part of the lower classifying wheel, an upper feeding port communicated with the upper classifying cavity is formed in the upper part of the shell, and a coarse material outlet communicated with the lower classifying cavity is formed in the lower part of the shell; an air inlet mechanism is also arranged on the shell. Particles to be classified enter the shell from the upper feed inlet, particles with the smallest particle size are discharged through the upper fine material outlet under the action of the upper classification wheel to be collected, the lower classification wheel is used for continuously classifying, wherein particles with larger particle size are discharged through the lower fine material outlet to be collected, and particles with the largest particle size are discharged through the coarse material outlet; can realize accurate fine powder proportion control and separation of two kinds of granularity fine powder.

Description

High-precision grader

Technical Field

The invention relates to a high-precision classifier.

Background

The current metal micro powder, battery material, carbon powder for printer and other industries have very high requirements on the content of the fine powder in the powder particle size group, the classifier in the prior art can only sort particles with one granularity, and the prior art cannot accurately control the proportion of the fine powder, so that the current requirements on the content of the fine powder in the powder particle size group in the industries of metal micro powder, battery material, carbon powder for printer and the like cannot be met.

Disclosure of Invention

In order to make up the defects, the invention provides a high-precision classifier capable of realizing precise fine powder proportion control and sorting of two granularity fine powders.

The technical scheme of the invention is as follows: the high-precision classifier comprises a shell, wherein openings are formed in the upper end and the lower end of the shell, annular baffles are fixedly arranged on the openings respectively, an upper classifying cavity is formed in the upper portion of the shell, an upper classifying wheel is rotatably arranged in the upper classifying cavity, a lower classifying cavity is formed in the lower portion of the shell, a lower classifying wheel is rotatably arranged in the lower classifying cavity, a buffer cavity is arranged between the upper classifying cavity and the lower classifying cavity, and the buffer cavity is communicated with the upper classifying cavity and the lower classifying cavity respectively; an upper discharging shell communicated with the upper grading cavity is fixedly arranged above the shell, an upper fine material outlet is formed in the upper part of the upper grading wheel, an upper sealing mechanism surrounding the upper fine material outlet is arranged between the upper grading wheel and an annular baffle plate positioned at the upper end of the shell, a central hole of the annular baffle plate corresponding to the upper grading wheel is used as an upper shell discharging hole, and the upper discharging shell is provided with an upper discharging hole; a lower discharging shell communicated with the lower grading cavity is arranged at the lower part of the shell, a lower fine material outlet is arranged at the lower part of the lower grading wheel, a lower sealing mechanism surrounding the lower fine material outlet is arranged between the lower grading wheel and an annular baffle plate positioned at the lower end of the shell, a central hole of the annular baffle plate corresponding to the lower grading wheel is used as a lower shell discharging hole, and a lower discharging hole is arranged on the lower discharging shell; an upper feed inlet communicated with the upper grading cavity is formed in the upper part of the shell, and a coarse material outlet communicated with the lower grading cavity is formed in the lower part of the shell; the device also comprises an upper grading driving mechanism for driving the upper grading wheel to rotate and a lower grading driving mechanism for driving the lower grading wheel to rotate; an air inlet mechanism is further arranged on the shell.

As the preferable technical scheme, the air inlet mechanism includes last inlet tube that last classifying cavity internally mounted is located around the last classifying wheel, lower classifying cavity internally mounted has and is located lower inlet tube around the lower classifying wheel, go up inlet tube with lower inlet tube all includes the barrel, the air intake has been seted up on the outer peripheral face of barrel, be equipped with on the barrel and follow the air current that the air intake got into carries out the deflector that leads, deflector guide air current slope in the diameter direction of barrel gets into the barrel inboard, be equipped with in the casing around the air inlet cavity of barrel.

As the preferable technical scheme, the air inlet cavity comprises an upper air inlet cavity and a lower air inlet cavity, the upper air inlet cavity surrounds the outer side of the upper air inlet cylinder, the lower air inlet cavity surrounds the outer side of the lower air inlet cylinder, and the upper air inlet cavity and the lower air inlet cavity are mutually separated.

As the preferable technical scheme, the cylinder comprises a first annular body and a second annular body, the second annular body is adjacent to the middle part of the shell, a plurality of guide plates are fixedly arranged between the first annular body and the second annular body, gaps between adjacent guide plates are used as the air inlets, and the guide plates guide air flow to enter the inner side of the cylinder obliquely to the diameter direction of the cylinder.

As a preferable technical scheme, the outer end opening of the air inlet is larger than the inner end opening of the air inlet.

As a preferable technical scheme, an inverted cone cover is arranged in the upper discharging shell, the lower port of the inverted cone cover is communicated with the upper fine material outlet, the inverted cone cover divides the upper discharging shell into an upper discharging cavity positioned at the upper part and an upper sealing air inlet cavity positioned at the lower part, the upper discharging cavity is communicated with the upper discharging hole and the upper fine material outlet, and the upper discharging cavity and the upper sealing air inlet cavity are isolated from each other; a conical cover is arranged in the lower discharging shell, the upper port of the conical cover is communicated with the lower fine material outlet, the conical cover divides the lower discharging shell into a lower discharging cavity positioned at the lower part and a lower sealing air inlet cavity positioned at the upper part, the lower discharging cavity is communicated with the lower discharging hole and the lower fine material outlet, and the lower discharging cavity and the lower sealing air inlet cavity are mutually isolated.

As a preferable technical scheme, an upper baffle plate positioned above the upper fine material outlet is arranged in the upper discharging shell, and the upper baffle plate rotates along with the rotation of the upper classifying wheel; the lower discharging shell is internally provided with a lower baffle plate positioned below the lower fine material outlet, and the lower baffle plate rotates along with the rotation of the lower classification wheel.

As an optimized technical scheme, the upper baffle plate is fixedly arranged on an upper sleeve, the upper sleeve is sleeved outside the upper grading driving shaft, and a connecting key is arranged between the upper sleeve and the upper grading driving shaft; the lower baffle plate is fixedly arranged on the lower sleeve, the lower sleeve is sleeved outside the lower grading driving shaft, and a connecting key is arranged between the lower sleeve and the lower grading driving shaft.

As a preferable technical scheme, the upper sealing air inlet cavity and the lower sealing air inlet cavity are connected with an air source, an upper sealing ring is fixedly sleeved at the lower end of the upper sleeve, an upper material passing gap is arranged between the upper sealing ring and the upper sleeve, a plurality of vertical baffle plates positioned in the upper material passing gap are fixedly arranged between the lower surface of the upper baffle plate and the upper sleeve, an upper sealing structure is arranged between the upper sealing ring and the lower surface of the annular baffle plate corresponding to the upper grading cavity, the upper part of the upper grading wheel is tightly attached to the lower surface of the upper sealing ring, the upper grading wheel and the upper sealing ring synchronously rotate, the upper sealing structure comprises a plurality of annular bodies arranged on the upper surface of the upper sealing ring, an upper annular groove in clearance fit with the annular bodies of the upper sealing ring is arranged on the lower surface of the annular baffle plate adjacent to the upper discharging shell, an upper ventilation gap is arranged between the upper annular groove and the corresponding annular body, the upper gap is communicated with the upper shell discharging hole, and the upper sealing ring groove is communicated with the upper sealing air inlet cavity through ventilation holes; a lower sealing ring is fixedly sleeved at the upper end of the lower sleeve, a lower blanking gap is arranged between the lower sealing ring and the lower sleeve, and a plurality of lower vertical blanking plates positioned in the lower blanking gap are fixedly arranged between the upper surface of the lower blanking plate and the lower sleeve; the lower sealing structure is arranged between the lower sealing ring and the upper surface of the annular baffle corresponding to the lower grading cavity, the lower part of the lower grading wheel is tightly attached to the upper surface of the lower sealing ring, the lower grading wheel and the lower sealing ring synchronously rotate, the lower sealing structure comprises a plurality of annular bodies arranged on the lower surface of the lower sealing ring, a lower annular groove in clearance fit with the annular body of the lower sealing ring is arranged on the upper surface of the annular baffle adjacent to the lower discharging shell, a lower ventilation clearance is arranged between the lower annular groove and the corresponding annular body, the lower ventilation clearance is communicated with the discharging hole of the lower shell, and the lower annular groove is mutually communicated with the lower sealing air inlet cavity through a vent hole.

As a preferable technical scheme, an axial gap communicated with the corresponding upper ventilation gap is formed in the inner wall of the upper shell discharge hole; the inner wall of the lower shell discharge hole is provided with an axial gap communicated with the corresponding lower ventilation gap.

Due to the adoption of the technical scheme, the high-precision classifier comprises a shell, wherein openings are formed in the upper end and the lower end of the shell, annular baffles are fixedly arranged on the openings respectively, an upper classifying cavity is formed in the upper part of the shell, an upper classifying wheel is rotatably arranged in the upper classifying cavity, a lower classifying cavity is formed in the lower part of the shell, a lower classifying wheel is rotatably arranged in the lower classifying cavity, and a buffer cavity positioned between the upper classifying cavity and the lower classifying cavity is also formed in the shell and is respectively communicated with the upper classifying cavity and the lower classifying cavity; an upper discharging shell communicated with the upper grading cavity is fixedly arranged above the shell, an upper fine material outlet is formed in the upper part of the upper grading wheel, an upper sealing mechanism surrounding the upper fine material outlet is arranged between the upper grading wheel and an annular baffle plate positioned at the upper end of the shell, a central hole of the annular baffle plate corresponding to the upper grading wheel is used as an upper shell discharging hole, and the upper discharging shell is provided with an upper discharging hole; a lower discharging shell communicated with the lower grading cavity is arranged at the lower part of the shell, a lower fine material outlet is arranged at the lower part of the lower grading wheel, a lower sealing mechanism surrounding the lower fine material outlet is arranged between the lower grading wheel and an annular baffle plate positioned at the lower end of the shell, a central hole of the annular baffle plate corresponding to the lower grading wheel is used as a lower shell discharging hole, and a lower discharging hole is arranged on the lower discharging shell; an upper feed inlet communicated with the upper grading cavity is formed in the upper part of the shell, and a coarse material outlet communicated with the lower grading cavity is formed in the lower part of the shell; the device also comprises an upper grading driving mechanism for driving the upper grading wheel to rotate and a lower grading driving mechanism for driving the lower grading wheel to rotate; an air inlet mechanism is further arranged on the shell. The upper classifying driving mechanism and the lower classifying driving mechanism drive the upper classifying wheel and the lower classifying wheel to rotate, particles to be classified enter the shell from the upper feeding hole, particles with the smallest particle size are discharged through the upper fine material outlet to be collected under the action of the upper classifying wheel, the lower classifying wheel continues classifying, wherein particles with larger particle size are discharged through the lower fine material outlet to be collected through the lower classifying wheel, and particles with the largest particle size are discharged through the coarse material outlet. The buffer cavity separates the upper classifying cavity from the lower classifying cavity, so that the upper classifying wheel and the lower classifying wheel can respectively classify particles with different particle sizes. Meanwhile, the buffer cavity enables the material flow direction to be from top to bottom, accumulation of materials in classification operation is avoided, and stable operation of the rotating part is ensured.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

FIG. 3 is an enlarged view of a portion of FIG. 1 at II;

FIG. 4 is an enlarged view of a portion of III in FIG. 2;

FIG. 5 is a schematic view of the structure of a lower classifier wheel in an embodiment of the invention;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;

FIG. 7 is a schematic view showing the positional relationship between the lower seal ring and the lower dam in the embodiment of the present invention;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a schematic view of the structure of the upper intake duct in the embodiment of the present invention;

fig. 10 is a D-D sectional view of fig. 9.

Detailed Description

As shown in fig. 1, 2, 3 and 4, a high-precision classifier comprises a shell 1, openings are formed in the upper end and the lower end of the shell 1, annular baffles 2 are fixedly installed on the openings respectively, an upper classifying cavity 3 is formed in the upper portion of the shell 1, an upper classifying wheel 4 is rotatably installed in the upper classifying cavity 3, a lower classifying cavity 5 is formed in the lower portion of the shell 1, a lower classifying wheel 6 is rotatably installed in the lower classifying cavity 5, a buffer cavity 7 located between the upper classifying cavity 3 and the lower classifying cavity 5 is further formed in the shell 1, and the buffer cavity 7 is respectively communicated with the upper classifying cavity 3 and the lower classifying cavity 5; an upper discharging shell 8 communicated with the upper grading cavity 3 is fixedly arranged above the shell 1, an upper fine material outlet 9 is formed in the upper part of the upper grading wheel 4, an upper sealing mechanism surrounding the upper fine material outlet 9 is arranged between the upper grading wheel 4 and the annular baffle plate 2 positioned at the upper end of the shell 1, a central hole of the annular baffle plate 2 corresponding to the upper grading wheel 4 is used as an upper shell discharging hole, the upper shell discharging hole is communicated with the upper fine material outlet 9, and the upper discharging shell 8 is provided with an upper discharging hole; a lower discharging shell 11 communicated with the lower grading cavity 5 is arranged at the lower part of the shell 1, a lower fine material outlet 12 is arranged at the lower part of the lower grading wheel 6, a lower sealing mechanism surrounding the lower fine material outlet 12 is arranged between the lower grading wheel 6 and the annular baffle 2 positioned at the lower end of the shell 1, a central hole of the annular baffle 2 corresponding to the lower grading wheel 6 is used as a lower shell discharging hole, the lower shell discharging hole is communicated with the lower fine material outlet 12, a lower discharging hole is arranged on the lower discharging shell, an upper feeding hole 14 communicated with the upper grading cavity 3 is arranged at the upper part of the shell 1, and a coarse material outlet 13 communicated with the lower grading cavity 5 is arranged at the lower part of the shell 1; the automatic classifying device further comprises an upper classifying driving mechanism for driving the upper classifying wheel 4 to rotate and a lower classifying driving mechanism for driving the lower classifying wheel 6 to rotate, and an air inlet mechanism is further arranged on the shell. The upper classifying driving mechanism and the lower classifying driving mechanism drive the upper classifying wheel 4 and the lower classifying wheel 6 to rotate, particles to be classified enter the shell from the upper feeding hole 14, particles with the smallest particle size are discharged through the upper fine material outlet 9 for collection under the action of the upper classifying wheel 4, the lower classifying wheel continues classifying, wherein particles with larger particle size are discharged through the lower classifying wheel 6 and the lower fine material outlet 12 for collection, and particles with the largest particle size are discharged through the coarse material outlet 13. The buffer cavity separates the upper classifying cavity 3 from the lower classifying cavity 5, so that the upper classifying wheel 4 and the lower classifying wheel 6 can respectively perform classifying operation and respectively perform granularity control. Meanwhile, the buffer cavity enables the material flow direction to be from top to bottom, accumulation of materials in classification operation is avoided, and stable operation of the rotating part is ensured. The classifier collects particles with the granularity meeting the requirements of the upper classifying wheel through the upper discharge port, and the lower discharge port collects particles with the granularity meeting the requirements of the lower classifying wheel, and can respectively sample and detect, so that the rotating speed of each classifying wheel is adjusted, and the classifying requirements of different particles are met.

As shown in fig. 1, fig. 2, fig. 3, fig. 9 and fig. 10, the air inlet mechanism comprises an upper air inlet barrel fixedly installed in the upper classifying cavity 3 and positioned around the upper classifying wheel 4, a lower air inlet barrel fixedly installed in the lower classifying cavity 5 and positioned around the lower classifying wheel 6, the upper air inlet barrel 19 and the lower air inlet barrel 20 both comprise a barrel 10, an air inlet 15 is formed in the peripheral surface of the barrel 10, a guide plate 16 for guiding air flow entering from the air inlet 15 is arranged on the barrel 10, the guide plate 16 guides the air flow to incline to the diameter direction of the barrel 10 and enter the inner side of the barrel 10, an air inlet cavity surrounding the barrel 10 is arranged in the shell 1, and the air inlet cavity is connected with a fan. The air flow generated by the fan enters the air inlet cavity, and then enters the inner side of the cylinder 10 in the diameter direction of the cylinder 10 by the action of the guide plate 16, so that the tangential air inlet is realized, the wind direction force is improved, and particles are blown away and small particles adsorbed on large particles are blown away.

As shown in fig. 1, the air inlet cavity comprises an upper air inlet cavity 17 and a lower air inlet cavity 18, the upper air inlet cavity 17 surrounds the outer side of the upper air inlet cylinder 19, the lower air inlet cavity 18 surrounds the outer side of the lower air inlet cylinder 20, and the upper air inlet cavity 17 and the lower air inlet cavity 18 are mutually separated. The upper air inlet cylinder and the lower air inlet cylinder are respectively provided with an upper air inlet cavity 17 and a lower air inlet cavity 18, so that air flow is more concentrated, and adsorbed particles can be blown away more effectively.

As shown in fig. 9 and 10, the cylinder 10 includes a first annular body 21 and a second annular body 22, the second annular body 22 is adjacent to the middle of the housing 1, a plurality of guide plates 16 are fixedly installed between the first annular body 21 and the second annular body 22, gaps between adjacent guide plates 16 serve as the air inlets 15, and the guide plates 16 guide air flow to enter the inner side of the cylinder 14 obliquely to the diameter direction of the cylinder 10. The outer end opening of the air inlet 15 is larger than the inner end opening of the air inlet 15. Therefore, the air flow speed at the inner end of the air inlet is faster, and adsorbed particles are blown away more effectively.

As shown in fig. 2 and 3, an upper baffle 29 above the upper fine material outlet 9 is arranged in the upper discharging shell 8, and the upper baffle 29 rotates along with the rotation of the upper classifying wheel 4; a lower baffle 30 is arranged in the lower discharging shell 11 and is positioned below the lower fine material outlet 12, and the lower baffle 30 rotates along with the rotation of the lower classification wheel. The upper baffle plate and the lower baffle plate can block particles entering the upper discharging shell and the lower discharging shell, so that agglomerated particles can be scattered, and efficient classification can be realized.

As shown in fig. 2 and 3, the upper stage driving mechanism comprises an upper stage driving shaft 32, and the upper stage driving shaft 32 is connected with a motor in a transmission way; the lower stage driving mechanism comprises a lower stage driving shaft 33, and the lower stage driving shaft 33 is connected with a motor in a transmission way. The rotating speeds of the upper grading wheel and the lower grading wheel can be respectively controlled, so that the same powder can be respectively cut in an adjustable granularity.

As shown in fig. 2 and 3, the upper striker plate 29 is fixedly mounted on an upper sleeve 31, the upper sleeve 31 is sleeved outside the upper classifying driving shaft 32, and a connecting key is arranged between the upper sleeve 31 and the upper classifying driving shaft 32; the lower baffle plate 30 is fixedly arranged on the lower sleeve 34, the lower sleeve 34 is sleeved outside the lower grading driving shaft 33, and a connecting key is arranged between the lower sleeve 34 and the lower grading driving shaft 33. The upper striker plate rotates with the rotation of the upper sleeve 31, and the lower striker plate 30 rotates with the rotation of the lower sleeve 34.

As shown in fig. 2, 3 and 4, an inverted cone cover 24 is arranged in the upper discharging shell, a lower port of the inverted cone cover 24 is communicated with the upper fine material outlet 9, the inverted cone cover 24 divides the upper discharging shell 8 into an upper discharging cavity 25 positioned at the upper part and an upper sealing air inlet cavity 26 positioned at the lower part, the upper discharging cavity 25 is communicated with the upper discharging hole and the upper fine material outlet 9, and the upper discharging cavity 25 and the upper sealing air inlet cavity 26 are isolated from each other; the lower discharging shell 11 is internally provided with a conical cover 27, the upper port of the conical cover 27 is communicated with the lower fine material outlet 12, the conical cover 27 divides the lower discharging shell into a lower discharging cavity 28 positioned at the lower part and a lower sealing air inlet cavity 59 positioned at the upper part, the lower discharging cavity 28 is communicated with the lower discharging hole and the lower fine material outlet 12, and the lower discharging cavity 28 and the lower sealing air inlet cavity 59 are isolated from each other.

As shown in fig. 2, 3, 4, 7 and 8, the upper sealing air inlet cavity 26 and the lower sealing air inlet cavity 59 are connected with an air source, the air source may be a fan, an upper sealing ring 35 is fixedly sleeved at the lower end of the upper sleeve 31, an upper material passing gap is arranged between the upper sealing ring 35 and the upper sleeve 31, a plurality of vertical baffle plates 37 positioned in the upper material passing gap are fixedly installed between the lower surface of the upper baffle plate 29 and the upper sleeve 31, the vertical baffle plates 37 rotate along with the rotation of the upper sleeve 31, particles adsorbed together can be effectively dispersed, the upper sealing ring 35 and the lower surface of the annular baffle plate 2 corresponding to the upper grading cavity 3 are provided with the upper sealing structure, the upper part of the upper grading wheel 4 is tightly attached to the lower surface of the upper sealing ring 35, the upper grading wheel 4 and the upper sealing ring 35 synchronously rotate, the upper sealing structure comprises a plurality of annular bodies 38 arranged on the upper surface of the upper sealing ring 35, the annular bodies 39 are arranged between the upper surface of the upper baffle plate and the lower annular body 2 and the annular groove 39 corresponding to the upper vent hole 60, and the upper vent hole 60 are correspondingly arranged between the upper annular body and the upper annular body 39 and the upper vent hole 60; the upper end of the lower sleeve 34 is fixedly sleeved with a lower sealing ring 40, a lower material passing gap 36 is formed between the lower sealing ring 40 and the lower sleeve 34, a plurality of lower vertical baffle plates 42 positioned in the lower material passing gap 36 are fixedly installed between the upper surface of the lower baffle plate 29 and the lower sleeve 34, the lower vertical baffle plates 42 rotate along with the rotation of the lower sleeve 34, particles adsorbed together can be effectively scattered, a lower sealing structure is arranged between the lower sealing ring 40 and the upper surface of the annular baffle plate 2 corresponding to the lower grading cavity 5, the lower part of the lower grading wheel 6 is tightly attached to the upper surface of the lower sealing ring 40, the lower grading wheel 6 and the lower sealing ring 40 synchronously rotate, the lower sealing structure comprises a plurality of annular bodies 38 arranged on the lower surface of the lower sealing ring 40, the upper surface of the annular baffle plate 2 adjacent to the lower material outlet shell is provided with a lower annular body 38 in clearance fit with the lower sealing ring 40, a lower annular groove and a corresponding annular body are arranged between the lower annular body and the annular body, the lower annular groove is communicated with the lower material outlet cavity through the lower annular groove and the vent hole 59. Through the clearance between the annular body 38 on the lower seal ring 40 and the lower annular groove and the air flow blown out through the clearance between the annular body 38 on the upper seal ring 35 and the upper annular groove 39, particles can be prevented from entering between the annular body 38 on the lower seal ring 40 and the lower annular groove and between the annular body 38 on the upper seal ring 35 and the upper annular groove 39, and the sealing effect is achieved.

As shown in fig. 2, 3 and 4, the inner wall of the upper shell discharging hole is provided with an axial gap 43 communicated with the corresponding upper ventilation gap 60; the inner wall of the lower shell discharge hole is provided with an axial gap 43 communicated with the corresponding lower ventilation gap. The axial slits 43 enable the air flow blown out through the upper and lower ventilation gaps 60, 43 to blow down and up the upper blanking plate along the axial gaps 43, thereby enabling the air flow to act on the particles so that small particles adsorbed on the large particles are separated from the large particles.

As shown in fig. 2, 3 and 4, the upper classifying wheel comprises an upper classifying wheel mounting sleeve 44, the upper classifying wheel mounting sleeve 44 is sleeved outside the upper classifying driving shaft 32, the upper classifying wheel mounting sleeve 44 is positioned below the upper sleeve 31, a connecting key is arranged between the upper classifying wheel mounting sleeve and the upper classifying driving shaft, the upper classifying wheel further comprises an upper mounting ring 46, a central hole of the upper mounting ring 46 is used as the upper fine material outlet 9, a lower deflector disc 48 is arranged at the lower end of the upper classifying wheel mounting sleeve 44, vertically extending classifying blades 47 are fixedly arranged between the lower deflector disc 48 and the upper mounting ring 46, a deflector cone 49 is arranged between the lower deflector disc 48 and the outer circumferential surface of the upper classifying wheel mounting sleeve 44, and a lower end plate 45 is fixedly arranged on the lower surface of the lower deflector disc 48; the lower classifying wheel comprises a lower classifying wheel mounting sleeve 50, a connecting key is arranged between the lower classifying wheel mounting sleeve 50 and the lower classifying driving shaft 33, the lower classifying wheel mounting sleeve 50 is sleeved outside the lower classifying driving shaft 33, the lower classifying wheel mounting sleeve 50 is positioned above the lower sleeve, the lower classifying wheel further comprises a lower mounting ring 55, a central hole of the lower mounting ring 55 is used as the lower fine material outlet 12, an upper deflector 56 is arranged at the upper end of the lower classifying wheel mounting sleeve 50, vertically extending classifying blades 47 are fixedly arranged between the upper deflector 56 and the lower mounting ring 55, a deflector inverted conical surface 51 is arranged between the upper deflector 56 and the outer peripheral surface of the lower classifying wheel mounting sleeve 50, and an upper end plate 57 is fixedly arranged on the upper surface of the upper deflector 56. The upper classifying wheel mounting sleeve 44 and the upper sleeve 31 are both sleeved outside the upper classifying driving shaft 32, and a tightening nut is mounted at the lower end of the upper classifying driving shaft, so that the upper part of the upper classifying wheel 4 is tightly attached to the lower surface of the upper sealing ring 35. The lower sleeve 34 and the lower classifying wheel mounting sleeve 50 are both sleeved outside the lower classifying driving shaft 33, and the upper end of the lower classifying driving shaft is provided with a jacking nut, so that the lower part of the lower classifying wheel 6 is tightly attached to the upper surface of the lower sealing ring 40.

As shown in fig. 2 and 3, the end surfaces of the upper end plate 57 and the lower end plate 45 adjacent to the middle of the housing are a part of spherical surfaces. So that the air flow movement is smoother.

Preferably, as shown in fig. 2, 3, 5 and 6, the guiding conical surface 49 and the guiding inverted conical surface 51 are revolution surfaces, a generatrix of the revolution surfaces comprises an arc line segment 53, the arc line segment 53 is an arc line segment, and a circle center of the arc line segment is located at the outer side of the generatrix. The airflow can move to the upper discharging shell and the lower discharging shell along the diversion conical surface, and the grading efficiency is improved.

As shown in fig. 2 and 3, the lower end of the diversion cone 49 of the upper classification wheel is lower than the lower end of the diversion plate 16 of the upper air inlet cylinder 19; the upper end of the flow guiding reverse conical surface 51 of the lower classifying wheel 6 is higher than the upper end of the flow guiding plate 16 of the lower air inlet cylinder 20. This allows the air flow to move upward from along the lower end of the inverted cone 49 and downward along the upper end of the inverted cone 51, avoiding the blockage of the air flow by the lower and upper baffles 48, 51.

As shown in fig. 2 and 3, the upper feed opening 14 is provided in the housing 1 and is located between the cylinder of the upper air intake cylinder 19 and the upper classifying wheel 4. The coarse material outlet 13 is provided on the housing 1 and is located between the cylinder of the lower air inlet cylinder 20 and the lower classifying wheel 6. So that the feeding and discharging efficiency is higher. Particles entering from the upper feed inlet can be directly acted by air flow entering from the upper air inlet cylinder, and then pass through the action of the grading wheel, so that the particles meeting the particle size requirement are collected.

As shown in fig. 2 and 3, the central hole of the second annular body 22 of the upper air inlet barrel 19 is provided with a conical surface 23, and the big end of the conical surface 23 is arranged below; the central bore of the second annular body 22 of the lower inlet air cylinder 20 has an inverted conical surface 54, the large end of the inverted conical surface 54 being at the upper end. The upper end of the conical surface 23 is higher than the lower end of the diversion cone 49, and the lower end of the conical surface 54 is lower than the upper end of the diversion inverted cone 51. Larger particles can be made to move up and down along the conical surface 23 into the lower classifier wheel and smaller particles can be made to move up and down along the conical surface 23 into the upper classifier wheel.

As shown in fig. 2 and 3, the large end of the inverted cone-shaped cover 24 is fixedly connected with the inner wall of the upper discharge shell 8, and the small end of the inverted cone-shaped cover 24 is fixedly connected with the annular baffle plate 2 at the lower side of the upper discharge shell 8; the large end of the conical cover 27 is fixedly connected with the inner wall of the lower discharging shell 11, and the small end of the conical cover 27 is fixedly connected with the annular baffle plate 2 on the upper side of the lower discharging shell 11.

The present invention is not limited to the above-described embodiments, and the above-described embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The high-precision classifier is characterized by comprising a shell, wherein openings are formed in the upper end and the lower end of the shell, annular baffles are fixedly arranged on the openings respectively, an upper classifying cavity is formed in the upper part of the shell, an upper classifying wheel is rotatably arranged in the upper classifying cavity, a lower classifying cavity is formed in the lower part of the shell, a lower classifying wheel is rotatably arranged in the lower classifying cavity, and a buffer cavity is arranged between the upper classifying cavity and the lower classifying cavity and is respectively communicated with the upper classifying cavity and the lower classifying cavity; an upper discharging shell communicated with the upper grading cavity is fixedly arranged above the shell, an upper fine material outlet is formed in the upper part of the upper grading wheel, an upper sealing mechanism surrounding the upper fine material outlet is arranged between the upper grading wheel and an annular baffle plate positioned at the upper end of the shell, a central hole of the annular baffle plate corresponding to the upper grading wheel is used as an upper shell discharging hole, and the upper discharging shell is provided with an upper discharging hole; a lower discharging shell communicated with the lower grading cavity is arranged at the lower part of the shell, a lower fine material outlet is arranged at the lower part of the lower grading wheel, a lower sealing mechanism surrounding the lower fine material outlet is arranged between the lower grading wheel and an annular baffle plate positioned at the lower end of the shell, a central hole of the annular baffle plate corresponding to the lower grading wheel is used as a lower shell discharging hole, and a lower discharging hole is arranged on the lower discharging shell; an upper feed inlet communicated with the upper grading cavity is formed in the upper part of the shell, and a coarse material outlet communicated with the lower grading cavity is formed in the lower part of the shell; the device also comprises an upper grading driving mechanism for driving the upper grading wheel to rotate and a lower grading driving mechanism for driving the lower grading wheel to rotate; an air inlet mechanism is further arranged on the shell.

2. The high-precision classifier as claimed in claim 1, wherein the air inlet mechanism comprises an upper air inlet barrel fixedly installed in the upper classifying cavity and positioned around the upper classifying wheel, a lower air inlet barrel fixedly installed in the lower classifying cavity and positioned around the lower classifying wheel, the upper air inlet barrel and the lower air inlet barrel both comprise a barrel, an air inlet is formed in the outer peripheral surface of the barrel, a guide plate for guiding air flow entering from the air inlet is arranged on the barrel, the guide plate guides the air flow to enter the inner side of the barrel obliquely to the diameter direction of the barrel, and an air inlet cavity surrounding the barrel is arranged in the shell.

3. The high precision classifier as claimed in claim 2, wherein the air inlet chamber comprises an upper air inlet chamber and a lower air inlet chamber, the upper air inlet chamber surrounds the outer side of the upper air inlet barrel, the lower air inlet chamber surrounds the outer side of the lower air inlet barrel, and the upper air inlet chamber and the lower air inlet chamber are mutually separated.

4. A high accuracy classifier according to claim 3 wherein the cylinder includes a first annular body and a second annular body, the second annular body being adjacent to the central portion of the housing, a plurality of baffles being fixedly mounted between the first annular body and the second annular body, gaps between adjacent baffles serving as the air inlet, the baffles directing air flow obliquely to the diameter of the cylinder into the inside of the cylinder.

5. The high precision classifier as claimed in claim 4, wherein the outer end opening of the air inlet is larger than the inner end opening of the air inlet.

6. The high-precision classifier as claimed in claim 1, wherein an inverted cone cover is provided in the upper discharge housing, a lower port of the inverted cone cover is communicated with the upper fine material outlet, the inverted cone cover partitions the upper discharge housing into an upper discharge cavity at an upper portion and an upper sealed air inlet cavity at a lower portion, the upper discharge cavity is communicated with the upper discharge port and the upper fine material outlet, and the upper discharge cavity and the upper sealed air inlet cavity are isolated from each other; a conical cover is arranged in the lower discharging shell, the upper port of the conical cover is communicated with the lower fine material outlet, the conical cover divides the lower discharging shell into a lower discharging cavity positioned at the lower part and a lower sealing air inlet cavity positioned at the upper part, the lower discharging cavity is communicated with the lower discharging hole and the lower fine material outlet, and the lower discharging cavity and the lower sealing air inlet cavity are mutually isolated.

7. The high precision classifier as claimed in claim 6, wherein an upper baffle plate is provided in the upper discharge housing above the upper fine material outlet, the upper baffle plate being rotated with the rotation of the upper classifying wheel; the lower discharging shell is internally provided with a lower baffle plate positioned below the lower fine material outlet, and the lower baffle plate rotates along with the rotation of the lower classification wheel.

8. The high-precision classifier of claim 7 wherein the upper striker plate is fixedly mounted on an upper sleeve, the upper sleeve is sleeved outside an upper classifying driving shaft, and a connecting key is arranged between the upper sleeve and the upper classifying driving shaft; the lower baffle plate is fixedly arranged on the lower sleeve, the lower sleeve is sleeved outside the lower grading driving shaft, and a connecting key is arranged between the lower sleeve and the lower grading driving shaft.

9. The high-precision classifier of claim 8, wherein the upper sealing air inlet cavity and the lower sealing air inlet cavity are connected with an air source, an upper sealing ring is fixedly sleeved at the lower end of the upper sleeve, an upper material passing gap is arranged between the upper sealing ring and the upper sleeve, a plurality of vertical baffle plates positioned in the upper material passing gap are fixedly arranged between the lower surface of the upper baffle plate and the upper sleeve, an upper sealing structure is arranged between the upper sealing ring and the lower surface of the corresponding annular baffle plate of the upper classifying cavity, the upper part of the upper classifying wheel is tightly attached to the lower surface of the upper sealing ring, the upper classifying wheel and the upper sealing ring synchronously rotate, the upper sealing structure comprises a plurality of annular bodies arranged on the upper surface of the upper sealing ring, an upper annular groove in clearance fit with the annular bodies of the upper sealing ring is arranged on the lower surface of the annular baffle plate adjacent to the upper discharging shell, an upper ventilation gap is arranged between the upper annular groove and the corresponding annular body, the upper gap is communicated with the upper discharging hole of the upper shell, and the upper ventilating hole is communicated with the upper ventilating hole through the upper ventilating hole; a lower sealing ring is fixedly sleeved at the upper end of the lower sleeve, a lower blanking gap is arranged between the lower sealing ring and the lower sleeve, and a plurality of lower vertical blanking plates positioned in the lower blanking gap are fixedly arranged between the upper surface of the lower blanking plate and the lower sleeve; the lower sealing structure is arranged between the lower sealing ring and the upper surface of the annular baffle corresponding to the lower grading cavity, the lower part of the lower grading wheel is tightly attached to the upper surface of the lower sealing ring, the lower grading wheel and the lower sealing ring synchronously rotate, the lower sealing structure comprises a plurality of annular bodies arranged on the lower surface of the lower sealing ring, a lower annular groove in clearance fit with the annular body of the lower sealing ring is arranged on the upper surface of the annular baffle adjacent to the lower discharging shell, a lower ventilation clearance is arranged between the lower annular groove and the corresponding annular body, the lower ventilation clearance is communicated with the discharging hole of the lower shell, and the lower annular groove is mutually communicated with the lower sealing air inlet cavity through a vent hole.

10. The high-precision classifier of claim 9 wherein the inner wall of the upper housing discharge port is provided with an axial slit in communication with the corresponding upper vent gap; the inner wall of the lower shell discharge hole is provided with an axial gap communicated with the corresponding lower ventilation gap.