CN218424149U

CN218424149U - Superfine powder grader

Info

Publication number: CN218424149U
Application number: CN202222129132.7U
Authority: CN
Inventors: 周志平
Original assignee: Changsha Huanxing Environmental Protection Technology Co ltd
Current assignee: Changsha Huanxing Environmental Protection Technology Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2023-02-03
Anticipated expiration: 2032-08-12

Abstract

The utility model relates to the technical field of ultrafine powder grading extraction equipment, and discloses an ultrafine powder grader, which comprises a separator shell, wherein the bottom of the separator shell is provided with an installation support, a rotary impeller is arranged inside the separator shell, an upper support is arranged at the top of the separator shell, a speed reducer base is arranged on the upper support, a speed reducer is arranged on the speed reducer base, the speed reducer is connected with a variable frequency motor, a long shaft is arranged between the rotary impeller and the speed reducer, the side wall of the separator shell is provided with a primary air inlet, an ultrafine powder passage is arranged on the upper support, and the ultrafine powder passage is communicated with the inside of the separator shell; the bottom of the separator shell is provided with a coarse powder outlet. The fineness of the finished product ultrafine powder can be ensured by controlling the speed of the rotary impeller when the fineness of the raw powder is changed; coarse ash after primary separation is scattered through the secondary air inlet for secondary separation, tertiary air separation is carried out through tertiary air, and separation efficiency and separation precision are improved. The utility model discloses simple structure, convenient to use is swift, is fit for promoting.

Description

Superfine powder grader

Technical Field

The utility model relates to a superfine powder is hierarchical to be drawed the relevant technical field of equipment, in particular to superfine powder grader.

Background

With the reversal of modern technology, more and more products have ever increasing requirements for raw materials. Some of the products have higher and higher requirements on the fineness of raw materials, and the fineness of the raw materials can reach 10um or even less than 5um, such as superfine graphite powder, polyvinyl alcohol superfine powder, dyes, ink coatings and the like. When parts are formed from ultrafine powders, the ultrafine level of the powder tends to provide the parts with excellent properties.

Ultrafine powders can be classified into two types, synthetic methods and pulverization methods. The synthesis method is a method of forming particles through atomic or molecular nucleation and growth processes, and among them, the evaporation-condensation method is the main method of preparing high purity ultra-fine powder, and its productivity is low and cost is high. The pulverization method is a method of atomizing a large volume of a solution or making particles fine (jet milling), but it cannot be widely used due to large investment, wide occupation of land, low output, poor applicability, and the like.

At present, the domestic ultrafine powder is basically ground and milled by adopting a grinding and milling process, but the milled finished product can not completely meet the fineness requirement of the ultrafine powder, only the ultrafine powder is graded by a fine selection grading device to extract qualified ultrafine powder, and unqualified ultrafine powder is reground and processed or used for other purposes.

The existing sorting equipment for the ultrafine powder generally has the defects of low efficiency, small output, few adjusting means and poor fineness control precision of finished powder, greatly influences the production efficiency of the ultrafine powder, increases the investment cost of enterprises and directly influences the development of enterprise operation scale.

Based on this, a new classifier was devised to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of superfine powder grader has improved the classification efficiency and the finished product powder fineness degree control accuracy of superfine powder, increases equipment adjustment means, is convenient for carry out hierarchical regulation according to the demand, has improved equipment and has exerted oneself, can in time separate qualified superfine powder.

In order to solve the technical problem, the utility model discloses a technical scheme's basic thinking is: an ultrafine powder classifier comprises a classifier shell, wherein an installation support is arranged at the bottom of the classifier shell, a rotating impeller is arranged in the classifier shell, an upper support is arranged at the top of the classifier shell, a speed reducer base is arranged on the upper support, a speed reducer is arranged on the speed reducer base, the speed reducer is connected with a variable frequency motor, a long shaft is arranged between the rotating impeller and the speed reducer, one end of the long shaft is connected with the rotating impeller, the other end of the long shaft is connected with an output shaft of the speed reducer, and an input shaft of the speed reducer is connected with an output shaft of the variable frequency motor; the side wall of the separator shell is provided with a primary air inlet, the upper support is provided with an ultrafine powder passage, and one end of the ultrafine powder passage is connected with the top of the separator shell and communicated with the inside of a rotary impeller in the separator shell; and a coarse powder outlet is formed in the bottom of the separator shell.

Further, the separator casing comprises last casing and lower casing concatenation, it is the cylinder structure to go up the casing, the casing is the infundibulate structure down, the one end that the casing opening is big links to each other with the side bottom of last casing down, the one end that the casing opening is little is located down to the middlings export.

Furthermore, the primary air inlet is formed in the side face of the upper shell and is arranged along the tangential direction of the upper shell.

Furthermore, the side surface of the upper shell is also provided with a secondary air inlet, the secondary air inlet is positioned below the primary air inlet, and the secondary air inlet and the primary air inlet are vertically arranged.

Furthermore, the wind direction of the secondary air inlet is opposite to that of the primary air inlet.

Further, the inferior valve lateral wall is equipped with the tertiary air import, and inside is equipped with the tertiary air conical disk, tertiary air conical disk bottom is equipped with the tertiary air conical cap, the internal regulation seat that is used for adjusting tertiary air conical cap height that still is equipped with of inferior valve, the internal lateral wall of inferior valve is equipped with the bracing piece that is used for supporting the regulation seat.

Furthermore, the tertiary air conical disc is of an inverted cone frustum structure, the tertiary air conical cap is of a cone structure, the side wall of the top end of the tertiary air conical disc is connected with the inner side wall of the lower shell, a ventilation opening is formed in the bottom end face of the tertiary air conical disc, the tertiary air conical disc is arranged at the ventilation opening, a gap is reserved between the tertiary air conical cap and the tertiary air conical disc, and the conical tip of the tertiary air conical disc faces the tertiary air conical disc.

Furthermore, the adjusting seat comprises an adjusting rod and a positioning sleeve, the positioning sleeve is sleeved on the side wall of the adjusting rod, a positioning hole is formed in the side wall of the positioning sleeve, a positioning bolt is arranged in the positioning hole, and the outer side wall of the positioning sleeve is connected with a supporting rod; the top end of the adjusting rod is connected with the tertiary air cone cap.

Furthermore, the horizontal position of the tertiary air inlet is lower than that of the bottom end face of the tertiary air conical disc.

The utility model has the advantages that:

the fineness control precision of the finished powder is higher. The required fineness of the finished product ultrafine powder can be achieved by adjusting the rotating speed of the rotating impeller fast or slowly and changing the centrifugal force generated by forced vortex, and the error is controlled within 1 um;

the fineness of the finished product ultrafine powder can be ensured by adjusting the rotating speed of the motor to control the speed of the rotating impeller when the fineness of the raw powder is changed;

the secondary air inlet is perpendicular to the primary air inlet, coarse ash after primary sorting is scattered through the secondary air inlet for secondary sorting, and tertiary air separation is carried out through tertiary air, so that sorting efficiency and sorting precision are greatly improved;

the output of the equipment is increased, and the sorted qualified ultrafine powder can be separated out in time.

The utility model discloses simple structure, convenient to use is swift, and the precision is high, is fit for promoting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.

In the figure: 1. a primary air inlet; 2. rotating the impeller; 3. a long axis; 4. an upper support; 5. a speed reducer base; 6. a speed reducer; 7. a variable frequency motor; 8. an ultra-fine powder passage; 9. a separator housing; 901. an upper housing; 902. a lower housing; 10. mounting a support; 11. a tertiary air conical disc; 12. a third air conical cap; 13. an adjusting seat; 1301. adjusting a rod; 1302. a positioning sleeve; 1303. positioning a bolt; 14. a support bar; 15. a coarse powder outlet; 16. a secondary air inlet; 17. and a tertiary air inlet.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be further explained with reference to the accompanying drawings:

example (b): as shown in fig. 1 and 2, an ultrafine powder classifier comprises a classifier housing 9, wherein a mounting support 10 is arranged at the bottom of the classifier housing 9, a rotary impeller 2 is arranged in the classifier housing 9, an upper support 4 is arranged at the top of the classifier housing, a speed reducer base 5 is arranged on the upper support 4, a speed reducer 6 is arranged on the speed reducer base 5, the speed reducer 6 is connected with a variable frequency motor 7, a long shaft 3 is arranged between the rotary impeller 2 and the speed reducer 6, one end of the long shaft 3 is connected with the rotary impeller 2, the other end of the long shaft 3 is connected with an output shaft of the speed reducer 6, and an input shaft of the speed reducer 6 is connected with an output shaft of the variable frequency motor 7; a primary air inlet 1 is formed in the side wall of a separator shell 9, an ultrafine powder passage 8 is formed in an upper support 4, and one end of the ultrafine powder passage 8 is connected with the top of the separator shell 9 and communicated with the inside of a rotary impeller 2 in the separator shell 9; the bottom of the separator shell 9 is provided with a coarse powder outlet 15.

The variable frequency motor 7 drives the rotary impeller 2 to rotate in the separator shell 9, the output power of the variable frequency motor 7 is adjusted, the rotating speed of the rotary impeller 2 is adjusted, and the rotating speed of the rotary impeller 2 influences the size of the screened particles of the ultrafine powder.

The airflow carrying the original powder enters the separator shell 9 from the primary air inlet 1, and rotates through the rotary impeller 2 to form a vortex to generate centrifugal force, most of coarse powder is thrown to the inner wall of the separator shell 9 to fall off, the faster the rotary impeller 2 rotates, the larger the generated forced vortex field is, the finer the particles thrown to the inner wall of the separator shell 9 are, and the finer the particles left in the vortex field are, so that the finer the particles of the finished product powder are; on the contrary, the slower the rotation of the rotary impeller 2, the smaller the generated forced eddy current field, the coarser the particles thrown to the inner wall of the classifier housing 9, the coarser the particles left in the eddy current field, so that the coarser the finished powder, the smaller the centrifugal force generated by the ultra-fine powder, the final elimination by the negative pressure weakening customer service in the rotary impeller 2, the ultra-fine powder flow into the rotary impeller 2 along with the negative pressure air flow, the upper support 4 rises to the ultra-fine powder passage 8, and is discharged out of the classifier through the ultra-fine powder passage 8, and the fallen coarse powder is discharged out of the coarse powder outlet 15 at the bottom of the classifier housing 9.

The separator shell 9 is formed by splicing an upper shell 901 and a lower shell 902, wherein the upper shell 901 is of a cylindrical structure, the lower shell 902 is of a funnel-shaped structure, the end with a large opening of the lower shell 902 is connected with the bottom of the side surface of the upper shell 901, and the coarse powder outlet 15 is arranged at the end with a small opening of the lower shell 902. The upper casing 901 is of a cylindrical structure, so that the air flow which enters from the primary inlet and is carried with the original powder can rotate along with the rotary impeller 2 in the separator casing 9, and the lower casing 902 is of a funnel-shaped structure, so that the falling coarse powder can be collected conveniently.

The primary air inlet 1 is arranged on the side surface of the upper casing 901 and arranged along the tangential direction of the upper casing 901. The airflow which enters from the primary inlet and is carried with the original powder can rotate along with the vortex, and cannot directly enter the rotary impeller 2 to influence the separation precision.

The side of the upper casing 901 is further provided with a secondary air inlet 16, the secondary air inlet 16 is located below the primary air inlet 1, and the secondary air inlet 16 is perpendicular to the primary air inlet 1.

The secondary air inlet 16 is opposite to the primary air inlet 1. The secondary air inlet 16 breaks up the coarse powder falling down along the side wall of the classifier housing 9, the ultra fine powder entrained therein is taken away by the negative pressure air flow under the action of the upper negative pressure, and the coarse powder continues to fall down.

The lateral wall of lower casing 902 is equipped with tertiary air import 17, and inside is equipped with tertiary air conical disk 11, and tertiary air conical disk 11 bottom is equipped with tertiary air cone cap 12, still is equipped with the regulation seat 13 that is used for adjusting tertiary air cone cap 12 height in the lower casing 902, and the lower casing 902 inside wall is equipped with the bracing piece 14 that is used for supporting regulation seat 13.

The tertiary air conical disc 11 is of an inverted cone frustum structure, the tertiary air conical cap 12 is of a cone structure, the side wall of the top end of the tertiary air conical disc 11 is connected with the inner side wall of the lower shell 902, a vent is formed in the bottom end face of the tertiary air conical disc 11, the tertiary air conical disc 11 is arranged at the vent, a gap is reserved between the tertiary air conical cap 12 and the tertiary air conical disc 11, and the conical tip of the tertiary air conical disc 11 faces the tertiary air conical disc 11. The size of the screened particles of the tertiary air is adjusted by adjusting the size of the gap between the tertiary air conical cap 12 and the tertiary air conical disc, the coarse powder falling after secondary separation is lifted upwards through the airflow with the tertiary air inlet 17 when passing through the gap between the tertiary air conical cap 12 and the tertiary air conical disc, the ultra-fine powder entrained in the coarse powder returns upwards into the upper shell 901 under the action of the lifting force, and the coarse powder continuously falls to the coarse powder outlet 15.

The adjusting seat 13 comprises an adjusting rod 1301 and a positioning sleeve 1302, the positioning sleeve 1302 is sleeved on the side wall of the adjusting rod 1301, a positioning hole is formed in the side wall of the positioning sleeve 1302, a positioning bolt 1303 is arranged in the positioning hole, and the outer side wall of the positioning sleeve 1302 is connected with the supporting rod 14; the top end of the adjusting rod 1301 is connected with the tertiary air cone cap 12. The size of the gap between the tertiary air cone cap 12 and the tertiary cone dividing plate is adjusted by adjusting the position of the rod 1301 in the positioning sleeve 1302, the position of the rod 1301 relative to the positioning sleeve 1302 is fixed by the positioning bolt 1303 in the positioning hole, the positioning sleeve 1302 is fixed in the lower shell 902 by the supporting rod 14, and the position of the adjusting seat 13 is supported and fixed.

The horizontal position of the tertiary air inlet 17 is lower than that of the bottom end surface of the tertiary air conical disc 11. So that the airflow of the tertiary air inlet 17 can directly act on the gap between the tertiary air cone cap 12 and the tertiary air cone separating disc.

When the sorting device is used, the rotating speed of the variable frequency motor 7 and the size of a gap between the tertiary air cone cap 12 and the tertiary cone separating disc are determined according to the fineness of the superfine powder to be sorted, the variable frequency motor 7 rotates to drive the rotary impeller 2 to rotate, a forced vortex is formed around the rotary impeller 2, a negative pressure upward air flow is formed inside the rotary impeller 2, the air flow carrying the originally-loaded powder enters the sorting device shell 9 from the primary air inlet 1 and rotates along with the vortex, the superfine powder which meets the sorting requirement is small in centrifugal force generated along with the rotation of the vortex, and after the superfine powder is overcome and finally eliminated by the negative pressure weakening in the rotary impeller 2, the superfine powder enters the rotary impeller 2 along with the negative pressure air flow, enters the superfine powder passage 8 of the upper support 4 along with the rotary impeller 2 and is discharged from the superfine powder passage 8; coarse powder which does not meet sorting is thrown to the inner wall of the upper shell 901 under the action of vortex centrifugal force and rotates and falls along the inner wall of the upper shell 901, meanwhile, airflow entering from a secondary air inlet 16 is input into the upper shell 901, when the falling coarse powder rotates to about 270 ℃, the falling coarse powder reaches the position of the secondary air inlet 16, the falling coarse powder is scattered under the action of the airflow of the secondary air inlet 16, superfine powder carried in the coarse powder is absorbed and taken away by negative pressure airflow under the action of upper negative pressure, secondary sorting is formed, coarse powder which is not absorbed and taken away continuously falls, and when the coarse powder passes through a gap between a tertiary air conical cap 12 and a tertiary cone disc, the airflow input from a tertiary air inlet 17 acts on the position of the gap, an upward lifting airflow is formed, when the coarse powder passes through the gap, the superfine powder carried in the coarse powder returns to the upper shell 901 under the action of the lifting airflow, the negative pressure airflow enters a rotating impeller 2, the coarse powder which is not lifted is discharged from a coarse powder outlet 15 and returns to a grinder for grinding or other purposes.

The fineness control precision of the finished powder is higher. The required fineness of the finished product ultrafine powder can be achieved by changing the centrifugal force generated by forced vortex by regulating the rotating speed of the rotating impeller 2 to be fast or slow, and the error is controlled within 1 um;

the fineness of the finished product ultrafine powder can be ensured by adjusting the rotating speed of the motor to control the speed of the rotary impeller 2 when the fineness of the original powder changes;

the secondary air inlet 16 is perpendicular to the primary air inlet 1, coarse ash after primary separation is scattered through the secondary air inlet 16 for secondary separation, and tertiary air separation is carried out through tertiary air, so that the separation efficiency and the separation precision are greatly improved;

In the actual use process, the long shaft 3 is utilized to hoist the rotating impeller 2 on the upper support 4, the reduction gear base 5 is installed on the upper support 4, the reduction gear base 5 and the upper support 4 are fixed through bolts, the reduction gear 6 is fixed on the reduction gear base 5, and the variable frequency motor 7 is connected with the reduction gear 6 through flanges.

Through erection support 10 with superfine powder grader fixed mounting on equipment support, conveniently collect the middlings of middlings export 15 exhaust.

Wear-resistant ceramic chips or wear-resistant materials are pasted on the inner walls of the upper shell 901 and the lower shell 902 and the lining of the upper support 4, so that the upper shell 901, the lower shell 902 and the upper support 4 are prevented from being worn too quickly, and the service life is prolonged.

The utility model discloses simple structure, convenient to use is swift, and the precision high efficiency is fast, is fit for promoting.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. An ultrafine powder grader is characterized in that: the separator comprises a separator shell, wherein an installation support is arranged at the bottom of the separator shell, a rotating impeller is arranged in the separator shell, an upper support is arranged at the top of the separator shell, a speed reducer base is arranged on the upper support, a speed reducer is arranged on the speed reducer base, the speed reducer is connected with a variable frequency motor, a long shaft is arranged between the rotating impeller and the speed reducer, one end of the long shaft is connected with the rotating impeller, the other end of the long shaft is connected with an output shaft of the speed reducer, and an input shaft of the speed reducer is connected with an output shaft of the variable frequency motor; a primary air inlet is formed in the side wall of the separator shell, an ultrafine powder passage is formed in the upper support, and one end of the ultrafine powder passage is connected with the top of the separator shell and communicated with the inside of a rotary impeller in the separator shell; and a coarse powder outlet is formed in the bottom of the separator shell.

2. An ultra fine powder classifier as set forth in claim 1, wherein: the sorter casing comprises last casing and lower casing concatenation, it is the cylinder structure to go up the casing, the casing is the infundibulate structure down, the one end that the casing opening is big links to each other with the side bottom of last casing down, the one end that the casing opening is little is located down to the middlings export.

3. A superfine powder classifier as defined in claim 2 wherein: the primary air inlet is formed in the side face of the upper shell and is arranged along the tangential direction of the upper shell.

4. A superfine powder classifier as defined in claim 3 wherein: the side surface of the upper shell is also provided with a secondary air inlet, the secondary air inlet is positioned below the primary air inlet, and the secondary air inlet and the primary air inlet are vertically arranged.

5. A superfine powder classifier as defined in claim 4 wherein: the wind direction of the secondary air inlet is opposite to that of the primary air inlet.

6. A superfine powder classifier as defined in claim 5 wherein: the utility model discloses a three times wind cone cap, including inferior valve lateral wall, tertiary air cone cap, inferior valve internal wall is equipped with the tertiary air import, and inside tertiary air cone disc that is equipped with, tertiary air cone cap bottom is equipped with the tertiary air cone cap, the internal regulation seat that is used for adjusting tertiary air cone cap height that still is equipped with of inferior valve, the internal lateral wall of inferior valve is equipped with the bracing piece that is used for supporting the regulation seat.

7. A superfine powder classifier as defined in claim 6 wherein: the three-time air conical disc is of an inverted cone frustum structure, the three-time air conical cap is of a cone structure, the side wall of the top end of the three-time air conical disc is connected with the inner side wall of the lower shell, a ventilation opening is formed in the bottom end face of the three-time air conical disc, the three-time air conical disc is arranged at the ventilation opening, a gap is reserved between the three-time air conical cap and the three-time air conical disc, and the conical tip of the three-time air conical disc faces towards the three-time air conical disc.

8. A superfine powder classifier as defined in claim 7 wherein: the adjusting seat comprises an adjusting rod and a positioning sleeve, the positioning sleeve is sleeved on the side wall of the adjusting rod, the side wall of the positioning sleeve is provided with a positioning hole, a positioning bolt is arranged in the positioning hole, and the outer side wall of the positioning sleeve is connected with a supporting rod; the top end of the adjusting rod is connected with the tertiary air cone cap.

9. An ultra fine powder classifier as set forth in claim 8, wherein: the horizontal position of the tertiary air inlet is lower than that of the bottom end face of the tertiary air conical disc.