CN112170203A

CN112170203A - Easily clean preferred grader of powder particle size

Info

Publication number: CN112170203A
Application number: CN202011089209.1A
Authority: CN
Inventors: 邢军; 徐春凤
Original assignee: 邢军
Current assignee: YANTAI JIECHENG POWDER EQUIPMENT Co.,Ltd.
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-01-05

Abstract

The invention relates to an easy-to-clean powder particle size optimization classifier, and belongs to the technical field of powder particle size optimization equipment. Including the casing of seting up the feed inlet, the detachable top cap is installed at the casing top, detachable toper cavity is installed to the bottom, inlay in the toper cavity and establish and install ash bucket in the toper, interior ash bucket has seted up a plurality of elutriation holes by lower position department, the toper cavity below is equipped with at least one air-supply line, install control flap on the air-supply line, the top cap top is equipped with the motor, the motor passes through connecting axle drive impeller and rotates, the impeller is located the casing, still be equipped with ejection of compact cavity between top cap and the motor, the discharge gate has been seted up to ejection of compact cavity side, the discharge. The invention can optimize the particle size of the powder coating in the production process, thereby reducing the content of ultrafine powder with the particle size of less than 10 mu m, screening the particle size of the powder coating according to actual requirements, improving the quality of the powder coating and being convenient to clean.

Description

Easily clean preferred grader of powder particle size

Technical Field

The invention relates to an easy-to-clean powder particle size optimization classifier, and belongs to the technical field of powder particle size optimization equipment.

Background

With the increasingly perfect powder spraying technology, the market demand for electrostatic powder coatings is more and more extensive, and the quality requirements are higher and higher. The powder particles produced by the existing powder production equipment are large, the particle size parameter distribution is wide, the coating sprayed on the surface is thick, the powder utilization rate is low, and great waste is generated. Moreover, the coating is thick, so that the defects of orange peel, spots and the like are easily caused. Powder coating is used as an environment-friendly coating to gradually replace solvent-based coatings and is widely applied to various fields. The quality of the powder coating becomes better and better along with continuous application, and how to improve the quality of the powder is very important in the production process of the powder coating. The influence of the particle size distribution of the powder on the quality of the powder coating is great, and the increase of the utilization rate of the coating and the reduction of the cost become necessary trends of market development.

In general, the smaller the powder particle size, the better the leveling property of the coating during curing, and the smoother and smoother the appearance of the coating film. But the powder particle size is too fine (particle size <10 μm) and is essentially uncharged. The electrification of the powder is proportional to the square of the particle diameter, and if the powder is too fine, the electrification is reduced, and the coating efficiency is lowered. The storage stability of the powder coating is also related to the particle size, and generally, the finer the powder is, especially, the content of the ultrafine powder of 10 μm or less is too much, so that the powder is liable to absorb moisture, agglomerate and decrease in stability, and when it is used, the spray gun is clogged, and the powder is not discharged well.

At present, in the production process of powder coating, no separation equipment for carrying out particle size on powder is provided, and the problems of wide particle size distribution, low powder feeding rate, unstable quality, small spraying area, serious pollution, gun blockage, influence on efficiency, easy agglomeration of finished powder, poor storage resistance and the like exist.

Therefore, there is an urgent need for a powder particle size-optimizing classifier that can overcome the above-mentioned problems.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide an easy-to-clean powder particle size optimizing classifier, which can optimize the particle size of a powder coating in the production process, thereby reducing the content of ultrafine powder with the particle size of less than 10 microns, screening the particle size of the powder coating according to actual requirements, improving the quality of the powder coating and being convenient to clean.

The invention relates to an easy-to-clean powder particle size optimal selection classifier, which is characterized by comprising a shell 2 provided with a feeding hole 1, wherein the top of the shell 2 is provided with a detachable top cover 3, the bottom of the shell is provided with a detachable conical chamber 4, the conical chamber 4 is internally embedded with a conical inner ash hopper 5, the lower part of the inner ash hopper 5 is provided with a plurality of elutriation holes 29, at least one air inlet pipeline 6 is arranged below the conical chamber 4, the air inlet pipeline 6 is provided with a control valve 7, a motor 8 is arranged above the top cover 3, the motor 8 drives an impeller 10 to rotate through a connecting shaft 9, the impeller 10 is positioned in the shell 2, a discharging chamber 11 is also arranged between the top cover 3 and the motor 8, the side surface of the discharging chamber 11 is provided with a discharging;

the top of the inner ash bucket 5 is arranged at the top of the conical chamber 4 through a flange 13, a cleaning handle 14 is arranged at the upper position in the inner ash bucket 5, and a discharge hole 15 is arranged below the inner ash bucket 5;

the impeller 10 comprises a flange 16 arranged at the bottom of the connecting shaft 9, a circle of spaced blades 17 are arranged on the circumference of the flange 16, the diameter of an inner ring at the bottom of each blade 17 is smaller than that of an inner ring at the top, the bottom of each blade 17 is arranged on the flange 16, and the top of each blade 17 is arranged on the reinforcing ring 28;

the included angle between the tangential direction of the blade 17 and the flange 16 is 15-20 degrees;

the bottom of the conical chamber 4 is provided with a base 18, and the number of the air inlet pipelines 6 is two, and the two air inlet pipelines are arranged on the base 18;

the shell 2 is provided with supporting legs 19;

the feeding hole 1 is sequentially communicated with a flour mill 20 and a feeding machine 21 through pipelines, the discharging hole 15 is sequentially communicated with a separator 22, a dust removal box 23 and a ventilator 24 through pipelines, and the bottom of the conical chamber 4 is sequentially connected with a rotary screen 26 and a weighing device 27;

and the top cover 3 is provided with an air regulating valve 25.

The easy-to-clean powder particle size optimization classifier is ingenious in structural design and has the following beneficial effects:

1. the powder coating is produced on line or off line for grading and optimizing the particle size, the content of ultrafine powder below 10 mu m is effectively reduced, the coarse particle size is ground again, the fine particle size is squeezed again, and the particle size distribution of the finished powder coating optimized by grading is very concentrated;

2. the electrification property of the finished product powder coating is enhanced, and the storage resistance is improved;

3. the cycle times are increased during automatic spraying, and the powder feeding rate is improved;

4. the quality of the powder coating is improved, the powder coating with the same quality can be sprayed out in a larger area, the coating thickness is more uniform, and the surface quality is greatly improved.

In conclusion, the invention can separate and collect the powder which reaches the particle size range required by customers in the crushed powder from the coarse powder and the ultrafine powder, the utilization rate of the particles with very concentrated particle size parameter distribution is greatly improved in the spraying process, the powder with the same quality can be sprayed out to a larger area, the coating thickness is uniform, the surface quality is greatly improved, and the requirement of market on cost reduction is met.

Drawings

FIG. 1: the invention discloses a structural schematic diagram of an easy-to-clean powder particle size optimization classifier;

FIG. 2: the invention relates to a sectional view of an impeller of an easy-to-clean powder particle size optimization classifier;

FIG. 3: the invention relates to a top view of an impeller of an easy-to-clean powder particle size optimization classifier;

FIG. 4: the invention relates to a structural schematic diagram of an ash bucket in an easy-to-clean powder particle size optimization classifier;

FIG. 5: the invention relates to a connection relation diagram of an easy-to-clean powder particle size optimization classifier, a pulverizer, a feeder, a separator, a dust removal box, a ventilator, a rotary screen and a weighing device;

in the figure: 1. a feed inlet; 2. a housing; 3. a top cover; 4. a conical chamber; 5. an inner ash bucket; 6. an air inlet pipeline; 7. a control valve; 8. a motor; 9. a connecting shaft; 10. an impeller; 11. a discharge chamber; 12. a discharge port; 13. a flange; 14. cleaning the handle; 15. a discharge port; 16. a flange plate; 17. a blade; 18. a base; 19. a support leg; 20. a pulverizer; 21. a feeder; 22. a separator; 23. a dust removal box; 24. a ventilator; 25. a gas regulating valve; 26. rotating the screen; 27. a weighing device; 28. a reinforcement ring; 29. and (4) washing the holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the present embodiment provides an easy-to-clean powder particle size optimization classifier, including a casing 2 having a feeding port 1, a detachable top cover 3 is installed on the top of the casing 2, a detachable conical chamber 4 is installed on the bottom of the casing, a conical inner ash bucket 5 is installed in the conical chamber 4 in an embedded manner, a plurality of elutriation holes 29 are opened at a position close to the lower portion of the inner ash bucket 5, at least one air inlet pipe 6 is installed below the conical chamber 4, a control valve 7 is installed on the air inlet pipe 6, a motor 8 is installed above the top cover 3, the motor 8 drives an impeller 10 to rotate through a connecting shaft 9, the impeller 10 is located in the casing 2, a discharging chamber 11 is further provided between the top cover 3 and the motor 8, a discharging port 12 is opened at a side surface of the discharging chamber 11.

Wherein, the top of the inner ash bucket 5 is arranged on the top of the conical chamber 4 through a flange 13, a cleaning handle 14 is arranged at the upper position in the inner ash bucket 5, and a discharge hole 15 is arranged below the inner ash bucket 5. The inner ash bucket 5 and the conical chamber 4 are detachable, and a cleaning handle 14 is arranged, so that the cleaning is convenient;

the specific structure of impeller: the impeller 10 comprises a flange 16 arranged at the bottom of the connecting shaft 9, a circle of spaced blades 17 are arranged on the circumference of the flange 16, the diameter of an inner ring at the bottom of each blade 17 is smaller than that of an inner ring at the top, the bottom of each blade 17 is arranged on the flange 16, the top of each blade 17 is arranged on the reinforcing ring 28, and an included angle formed between the tangential direction of each blade 17 and the flange 16 is 15-20 degrees;

in order to facilitate the installation of the air inlet pipes 6 and ensure that air enters the conical chamber 4 from bottom to top, the bottom of the conical chamber 4 is provided with a base 18, and the two air inlet pipes 6 are arranged on the base 18;

in order to facilitate stable installation, the shell 2 is provided with supporting legs 19;

when the device is used, the feeding port 1 is sequentially communicated with the flour mill 20 and the feeding machine 21 through pipelines, the discharging port 15 is sequentially communicated with the separator 22, the dust removal box 23 and the ventilator 24 through pipelines, and the bottom of the conical chamber 4 is sequentially connected with the rotary screen 26 and the weighing device 27.

The working principle is as follows:

the material lifting power of the grader comes from the ventilator 24. After the material is conveyed from the feeding machine 21 to the grinding machine 20 to be crushed, the material is lifted to the classifier of the invention, the motor 8 drives the impeller 10 to rotate through the connecting shaft 9, particles reaching a certain particle size are separated out through the action of centrifugal force, the part of the material is discharged to the rotary screen 26 through the discharge hole at the lower end of the conical chamber 4, coarse powder exceeding the required particle size is screened out through the rotary screen 26, and finished product powder enters a packing box from the discharge hole of the rotary screen 26 and is packed after being measured by the weighing device 27. Meanwhile, a proper amount of secondary fresh air is charged through an air inlet pipeline 6 with a control valve 7, so that part of materials with the particle size smaller than the required particle size are screened out, the materials are conveyed to a separator 22 through an impeller 10 and a discharge chamber 11, most of dust is separated and collected through gas-solid separation of the separator 22, the other part of dust is conveyed to a dust removal box 23 and is filtered and collected by a filter element, clean air is discharged to the atmosphere through a ventilator 24, and the production is finished.

The invention is provided with a motor 8 and an air inlet pipeline 6 with a control valve 7, and achieves the aim of particle size separation by adjusting the parameters of the motor 8 and the control valve. The invention can obtain particles with d10> =10 μm and d90< =30 μm particle size parameters. The invention can realize on-line one-time gas-solid separation in one production line without using additional equipment and field, can complete production by one-time operation of workers, and simultaneously reduces dust pollution.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an easy preferred grader of clean powder particle diameter, its characterized in that is including the casing of seting up the feed inlet, the detachable top cap is installed at the casing top, detachable toper cavity is installed to the bottom, inlay in the toper cavity and establish and install ash bucket in the toper, interior ash bucket has seted up a plurality of holes of elutriating by lower position department, toper cavity below is equipped with at least one air-supply line, install control flap on the air-supply line, the top cap top is equipped with the motor, the motor passes through connecting axle drive impeller and rotates, the impeller is located the casing, still be equipped with ejection of compact cavity between top cap and the motor, the discharge gate has been seted up to ejection of.

2. The easy-to-clean powder particle size preference classifier as claimed in claim 1, wherein the top of the inner ash bucket is mounted on the top of the conical chamber through a flange, a cleaning handle is mounted at the upper position in the inner ash bucket, and a discharge port is arranged below the inner ash bucket.

3. The easy-to-clean powder particle size preference classifier according to claim 1 or 2, wherein the impeller comprises a flange plate arranged at the bottom of the connecting shaft, a circle of spaced blades are arranged on the circumference of the flange plate, the diameter of the inner ring at the bottom of each blade is smaller than that of the inner ring at the top of each blade, the bottom of each blade is arranged on the flange plate, and the top of each blade is arranged on the reinforcing ring.

4. The easy-to-clean powder particle size preference classifier according to claim 3, wherein the included angle between the tangential direction of the blade and the flange is 15-20 °.

5. The easy-to-clean powder particle size preference classifier according to claim 1, wherein the bottom of the conical chamber is provided with a base, and the number of the air inlet pipelines is two, and the two air inlet pipelines are both arranged on the base.

6. An easy-to-clean powder particle size preference classifier as claimed in claim 1, wherein the housing is provided with legs.

7. The easy-to-clean powder particle size preference classifier according to claim 1, wherein the feed inlet is sequentially communicated with the pulverizer and the feeder through pipelines, the discharge outlet is sequentially communicated with the separator, the dust removal box and the ventilator through pipelines, and the bottom of the conical chamber is sequentially connected with the rotary screen and the weighing device.

8. An easy-to-clean powder particle size preference classifier as claimed in claim 1 or 7, wherein the top cover is provided with a gas regulating valve.