CN219129480U

CN219129480U - Improved jet mill

Info

Publication number: CN219129480U
Application number: CN202223462044.5U
Authority: CN
Inventors: 肖雪良; 顾正稳; 戈雪弟; 徐荣杰
Original assignee: Kunshan Qiangdi Pulverizer Equipment Co ltd
Current assignee: Kunshan Qiangdi Pulverizer Equipment Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-06-06
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses an improved jet mill, which relates to the technical field of jet mill, and comprises a lower cover, wherein a mill bin is arranged at the upper end of the lower cover, an upper cover is arranged at the upper end of the mill bin, a discharge hole is arranged at the upper end of the upper cover, a secondary venturi tube is arranged at the right part of the outer surface of the mill bin, a secondary nozzle is arranged at the right end of the secondary venturi tube, a connecting pipe is arranged at the upper part of the outer surface of the secondary venturi tube, a primary venturi tube is arranged at the right part of the outer surface of the connecting pipe, the primary venturi tube and the secondary venturi tube are arranged in parallel, a feed inlet is arranged at the upper part of the outer surface of the primary venturi tube, a primary nozzle is arranged at the right end of the primary venturi tube, and a base is arranged at the lower end of the lower cover. According to the utility model, the primary venturi tube is matched with the target plate to pre-crush the materials, so that the material crushing efficiency is improved, the time of the materials in the crushing bin is prolonged by arranging the limiting plate, and the crushing quality is improved.

Description

Improved jet mill

Technical Field

The utility model relates to the technical field of jet milling, in particular to an improved jet milling device.

Background

The jet mill mainly comprises a crushing chamber, a nozzle opening, a discharge opening, a jet outlet, a compressed air inlet, a classification area and the like. The flat jet mill has a simple structure and easy manufacture, and thus has wide application. The working principle of the flat jet mill is as follows: the material is quantitatively fed by the feeding device, compressed air is used as a carrier, the material is fed into the crushing cavity, and the material is driven by specific supersonic airflow after entering the crushing cavity, so that logistics are regularly formed, particles of the material are impacted and sheared, and collide and rub with the cavity wall of the crushing cavity, the upper cover and the lower cover, so that the crushing purpose is achieved. During the comminution process, particles of different fineness generate different centrifugal forces in the rotating air stream. Coarse particles are thrown to the periphery due to the fact that the centrifugal force is larger than the acting force of centripetal airflow, the crushing process is continued, particles with qualified fineness are carried to a discharge hole by exhaust airflow due to the acting force of the centripetal airflow, and the particles enter a particle classification device through a pipeline or directly enter a cyclone separator for gas-solid separation, so that a finished product is obtained.

Most of the existing flat jet mills directly spray materials into a crushing cavity for crushing, but the particle size of part of the materials is larger, the materials can be crushed only by long-time collision and friction in the crushing cavity, so that the crushing efficiency is reduced, and therefore, an improved jet crushing device is provided.

Disclosure of Invention

The utility model mainly aims to provide an improved jet mill which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides an improved generation jet milling device, includes the lower cover, smash the storehouse is installed to the lower cover upper end, smash the upper cover is installed to the storehouse upper end, the discharge gate is installed to the upper cover upper end, smash storehouse surface right-hand member and install second grade venturi, second grade venturi right-hand member is installed the second grade nozzle, the connecting pipe is installed on second grade venturi surface upper portion, the one-level venturi is installed on connecting pipe surface right-hand member, one-level venturi is mutual parallel arrangement with second grade venturi, the feed inlet is installed on one-level venturi surface upper portion, one-level nozzle is installed to one-level venturi right-hand member, the base is installed to the lower cover lower extreme.

Preferably, the target plate is installed to the connecting pipe inner wall, the target plate right-hand member is the inclined plane structure, the target plate is located one-level venturi directly over the left side.

Preferably, the crushing bin is of a cylindrical structure, an inner bushing is fixedly sleeved on the inner wall of the crushing bin, and a spiral groove is formed in the inner wall of the inner bushing.

Preferably, a limiting plate is arranged at the lower end of the upper cover, the limiting plate is of an inverted truncated cone-shaped structure, and a through hole which penetrates up and down is formed at the lower end of the limiting plate.

Preferably, the diameter of the through hole is equal to the diameter of the inner cavity of the discharge hole.

Preferably, the diameter of the upper end surface of the limiting plate is equal to the diameter of the inner cavity of the crushing bin.

Compared with the prior art, the utility model has the following beneficial effects:

1. the primary venturi tube is matched with the target plate to pre-crush the materials, when the materials enter the primary venturi tube through the feed inlet, the primary nozzle ejects dry compressed air, the air flow drives the materials to be accelerated when passing through the middle part of the primary venturi tube, then the materials impact on the target plate, so that the materials with larger particle size are crushed, then the materials fall into the secondary venturi tube, the secondary nozzle ejects dry compressed air, the air flow drives the materials to be accelerated again when passing through the middle part of the secondary venturi tube, then the materials enter the inner cavity of the crushing bin, and the air flow drives the materials to impact and shear each other, collide with the cavity wall of the crushing bin, the upper cover and the lower cover, so that the crushing purpose is achieved, and the crushing efficiency is effectively improved;

2. through setting up the inner liner and being used for protecting crushing storehouse lateral wall, the rethread sets up the area of contact of helicla flute increase with the material, further improves crushing effect, makes crushing storehouse inner chamber form middle narrow wide structure around through setting up the limiting plate, and the restriction material discharges the discharge gate under centripetal current effect, prolongs the time of material in crushing storehouse, improves crushing quality.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic perspective view of a pulverizing bin;

fig. 4 is a schematic perspective view of the upper cover.

In the figure: 1. a lower cover; 2. crushing the bin; 3. an upper cover; 4. a discharge port; 5. a secondary venturi; 6. a secondary nozzle; 7. a connecting pipe; 8. a primary venturi; 9. a feed inlet; 10. a primary nozzle; 11. a base; 21. an inner liner; 22. a spiral groove; 31. a limiting plate; 32. a through hole; 71. a target plate.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. 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.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-4, an improved jet mill device comprises a lower cover 1, in this embodiment, the lower cover 1 is in a circular structure, the diameter of the lower cover 1 is larger than that of the mill bin 2, the mill bin 2 is installed at the upper end of the lower cover 1, an upper cover 3 is installed at the upper end of the mill bin 2, in this embodiment, the upper cover 3 and the lower cover 1 are fixedly connected through bolts, a discharge port 4 is installed at the upper end of the upper cover 3, the discharge port 4 is located at the center of the upper cover 3, a secondary venturi 5 is installed at the right part of the outer surface of the mill bin 2, in this embodiment, the outer diameter of the secondary venturi 5 is equal to the height of the mill bin 2, a secondary nozzle 6 is installed at the right end of the secondary venturi 5, in the process of milling, the secondary nozzle 6 is connected with a pressurized dry air source, a connecting pipe 7 is installed at the upper part of the outer surface of the secondary venturi 5, a connecting pipe 7 is installed at the right part of the outer surface of the secondary venturi 8, a secondary venturi 8 is installed at the right end of the venturi 8, a primary base is installed at the right end of the secondary venturi 8, a primary venturi 10 is installed at the right end of the secondary venturi 8, and a primary base 10 is installed at the primary end of the primary venturi 8.

Further, the target plate 71 is installed to the connecting pipe 7 inner wall, the target plate 71 right-hand member is the inclined plane structure, the target plate 71 is located first level venturi 8 directly over the left side, drives the material granule through the high-speed air current of first level nozzle 10 and strikes target plate 71 for the material of great granule is smashed.

Further, the crushing bin 2 is in a cylindrical structure, an inner bushing 21 is fixedly sleeved on the inner wall of the crushing bin 2, and a spiral groove 22 is formed in the inner wall of the inner bushing 21.

Further, a limiting plate 31 is mounted at the lower end of the upper cover 3, the limiting plate 31 is in an inverted truncated cone-shaped structure, and a through hole 32 penetrating up and down is formed at the lower end of the limiting plate 31.

Further, the diameter of the through hole 32 is equal to the diameter of the inner cavity of the discharging hole 4.

Further, the diameter of the upper end surface of the limiting plate 31 is equal to the diameter of the inner cavity of the crushing bin 2.

It should be noted that, the utility model is an improved jet mill, the first-stage venturi tube 8 is arranged to cooperate with the target plate 71 to pre-crush the material, when the material enters the first-stage venturi tube 8 through the feed inlet 9, the dried compressed air is sprayed out through the first-stage nozzle 10, the air flow drives the material to be accelerated when passing through the middle part of the first-stage venturi tube 8, then to strike the target plate 71, so that the material with larger particle size is crushed, then the material falls into the second-stage venturi tube 5, the dried compressed air is sprayed out through the second-stage nozzle 6, the air flow drives the material to be accelerated again through the middle part of the second-stage venturi tube 5, then enters the inner cavity of the crushing bin 2, and the air flow drives the material particles to collide and shear each other, and collide with the cavity wall of the crushing bin 2, the upper cover 3 and the lower cover 1, thus achieving the crushing purpose, and effectively improving the crushing efficiency; through setting up inner liner 21 and being used for protecting crushing storehouse 2 lateral wall, the rethread sets up the helicla flute 22 increase with the area of contact of material, further improves crushing effect, makes crushing storehouse 2 inner chamber form middle narrow structure around wide through setting up limiting plate 31, and the restriction material discharges discharge gate 4 under the centripetal current effect, prolongs the time of material in crushing storehouse 2, improves crushing quality.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An improved jet mill device, comprising a lower cover (1), characterized in that: crushing storehouse (2) are installed to lower cover (1) upper end, upper cover (3) are installed to crushing storehouse (2) upper end, discharge gate (4) are installed to upper cover (3) upper end, secondary venturi (5) are installed on crushing storehouse (2) surface right-hand member, secondary nozzle (6) are installed to secondary venturi (5) right-hand member, connecting pipe (7) are installed on secondary venturi (5) surface upper portion, one-level venturi (8) are installed on connecting pipe (7) surface right-hand member, one-level venturi (8) are parallel arrangement each other with secondary venturi (5), feed inlet (9) are installed on one-level venturi (8) surface upper portion, one-level nozzle (10) are installed on one-level venturi (8) right-hand member, base (11) are installed to lower cover (1) lower extreme.

2. An improved jet mill according to claim 1, wherein: the target plate (71) is installed to connecting pipe (7) inner wall, target plate (71) right-hand member is inclined plane structure, target plate (71) are located one-level venturi (8) directly over the left side.

3. An improved jet mill according to claim 2, wherein: the crushing bin (2) is of a cylindrical structure, an inner bushing (21) is fixedly sleeved on the inner wall of the crushing bin (2), and a spiral groove (22) is formed in the inner wall of the inner bushing (21).

4. An improved jet mill according to claim 3, wherein: the limiting plate (31) is arranged at the lower end of the upper cover (3), the limiting plate (31) is of an inverted truncated cone-shaped structure, and a through hole (32) penetrating up and down is formed in the lower end of the limiting plate (31).

5. An improved jet mill as claimed in claim 4, wherein: the diameter of the through hole (32) is equal to the diameter of the inner cavity of the discharge hole (4).

6. An improved jet mill as claimed in claim 5, wherein: the diameter of the upper end surface of the limiting plate (31) is equal to the diameter of the inner cavity of the crushing bin (2).