CN218394018U

CN218394018U - Air flow crusher

Info

Publication number: CN218394018U
Application number: CN202222758385.0U
Authority: CN
Inventors: 徐鑫; 曾鸿海
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-01-31
Anticipated expiration: 2032-10-19

Abstract

The utility model provides a fluid energy mill belongs to crushing apparatus technical field, include: the crushing barrel is provided with a feed inlet in a communication manner, the lower part of the crushing barrel is provided with a primary nozzle group, and at least N stages of nozzle groups are arranged on the crushing barrel and above the primary nozzle group, wherein N is more than or equal to 1, and N is a positive integer; the grading cylinder is communicated with the crushing cylinder and is provided with a discharge hole, and a grading structure is arranged on the grading cylinder and is suitable for grading and screening the powder in the grading cylinder. The utility model provides a pair of fluid energy mill returns the secondary material in the crushing barrel by a hierarchical section of thick bamboo and can be smashed by N level nozzle group, and new material is smashing through one-level nozzle group and N level nozzle group along the in-process that the crushing barrel flows to a hierarchical section of thick bamboo, has improved the homogeneity of smashing the back fineness of grain to crushing efficiency has been promoted.

Description

Air flow crusher

Technical Field

The utility model relates to a crushing apparatus technical field, concretely relates to fluid energy mill.

Background

The mechanical crushing equipment for preparing the superfine powder mainly comprises a high-speed mechanical impact mill, a jet mill, a stirring mill, a vibration mill and the like. The jet mill is popular in the milling industry due to the advantages of high product purity, good dispersibility, fine particle size, narrow distribution and the like, and is widely applied to the industries of medicine, biology, food, pesticide and the like. Jet mills use powerful, multi-turbulent flow fields formed by high-velocity air jets to deform solid particles and break them up in collisions with collision plates or vessel walls. In the high-speed movement and crushing process of the material flow, different centrifugal forces can be generated in the rotating air flow by the particles with different fineness, the fine particles are discharged through the discharge port along with the air flow, and the larger particles (secondary materials) return to the crushing chamber and continue the milling process. However, the existing jet mill has only one group of nozzles along the flowing direction of the materials, and the new materials and the secondary materials are crushed together, so that the over-crushing phenomenon of small particles occurs, the particle fineness distribution range is wide, the crushing efficiency is lower, and the energy consumption is large.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defects that the fineness distribution range of the crushed particles of the air flow crusher is wide, the crushing efficiency is lower and the energy consumption is large among the prior art, thereby providing an air flow crusher.

In order to solve the above problem, the utility model provides an air flow crusher, include: the crushing barrel is communicated with and provided with a feeding hole, a first-stage nozzle group is arranged at the lower part of the crushing barrel, at least N-stage nozzle groups are further arranged on the crushing barrel and above the first-stage nozzle group, wherein N is greater than or equal to 1, and N is a positive integer; the grading cylinder is communicated with the crushing cylinder and is provided with a discharge hole, and a grading structure is arranged on the grading cylinder and is suitable for grading and screening the powder in the grading cylinder.

Optionally, the nozzle group of the first stage includes a plurality of nozzles arranged at intervals along the circumference of the crushing cylinder.

Optionally, the air injection directions of several of the nozzles meet at a point.

Optionally, the N stages of nozzle groups include a plurality of nozzles arranged at intervals in the circumferential direction of the milling drum.

Optionally, each nozzle in the N-stage nozzle group includes a main nozzle and an auxiliary nozzle, the auxiliary nozzle is communicated with the main nozzle and arranged at an included angle or perpendicular to each other, and the auxiliary nozzle is arranged at intervals along the periphery of the main nozzle.

Optionally, the air injection directions of several main nozzles meet at a point.

Optionally, a reducing structure is arranged at the upper part of the crushing cylinder, and the inner diameter of the reducing structure is smaller than that of the grading cylinder.

Optionally, N stages of the nozzle groups are disposed at the reducing structure, where N is equal to 1.

Optionally, the hierarchical structure is provided with a plurality of hierarchical structures, and the plurality of hierarchical structures are arranged at intervals along the circumference of the hierarchical cylinder.

Optionally, the grading structure comprises a driving part and a grading wheel, and the driving part is suitable for driving the grading wheel to rotate.

The utility model has the advantages of it is following:

1. the utility model provides a pair of fluid energy mill sets up N level nozzle group through the top at one-level nozzle group, returns the secondary material in the crushing barrel by a hierarchical section of thick bamboo and can smash by N level nozzle group, and new material is along crushing barrel smash to the in-process that a hierarchical section of thick bamboo flows through one-level nozzle group and N level nozzle group, has improved the homogeneity of smashing the back particle fineness to crushing efficiency has been promoted.

2. The utility model provides a pair of fluid energy mill through setting up the undergauge structure for the granule in the air current that flows into in the classifying cylinder by the crushing cylinder can not produce direct striking with hierarchical structure, reduces hierarchical structure's wearing and tearing, prolongs hierarchical structure's life, the manufacturing cost of reduction equipment.

3. The utility model provides a pair of fluid energy mill, the nozzle in the N level nozzle group sets up to the main nozzle and is the supplementary nozzle that the contained angle set up with the main nozzle to utilize the main nozzle to smash the granule, and utilize and assist near the air current disturbance and the granule collision of nozzle increase main nozzle, guarantee that the granule that is located the dead angle position also can smash, promoted the crushing effect of nozzle.

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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 view illustrating an overall structure of a jet mill according to an embodiment of the present invention;

fig. 2 is a schematic view showing an internal structure of a jet mill according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a second nozzle provided by an embodiment of the present invention.

Description of reference numerals:

10. a grinding cylinder; 11. a feed inlet; 20. a grading cylinder; 21. a discharge port; 30. a first nozzle; 40. a second nozzle; 41. a main nozzle; 42. an auxiliary nozzle; 50. a hierarchical structure; 60. a diameter reducing structure; 61. a cylindrical barrel; 62. a conical cylinder.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

One embodiment of the jet mill shown in fig. 1 to 3 comprises: a milling drum 10, a classifying drum 20, a primary nozzle group, an N-stage nozzle group, and a classifying structure 50. The crushing cylinder 10 is communicated with the grading cylinder 20, the crushing cylinder 10 is communicated with the feed inlet 11, and the grading cylinder 20 is communicated with the discharge outlet 21. The primary nozzle group is arranged on the crushing barrel 10 and communicated with the inside of the crushing barrel 10, the N-level nozzle group is also arranged on the crushing barrel 10 and positioned above the primary nozzle group, wherein N is more than or equal to 1, and N is a positive integer. The grading structure 50 is disposed on the grading cylinder 20 and extends to the inside of the grading cylinder 20, and the grading structure 50 is adapted to discharge the powder in the grading cylinder 20 through the discharge port 21 or return the powder to the pulverizing cylinder 10 again so as to grade and screen the powder in the grading cylinder 20.

In the conventional technology, only the primary nozzle group shown in the present example is usually provided in the grinding cylinder 10, and the powder newly introduced from the inlet 11 and the powder returned from the classifying cylinder 20 into the grinding cylinder 10 are ground by the primary nozzle group. In the present embodiment, the N-stage nozzle groups are provided in addition to the first-stage nozzle group, and the N-stage nozzle group is located above the first-stage nozzle group, so that the particles returned from the classifying cylinder 20 do not have to fall to the lower portion of the pulverizing cylinder 10, and the returned particles can be secondarily pulverized while falling to the N-stage nozzle group.

It should be noted that, N is greater than or equal to 1, which means that at least one stage of the N-stage nozzle sets is arranged, that is, at least one more stage of the nozzle sets is arranged above the one-stage nozzle set.

It should be further noted that the "stage" mentioned in the present embodiment may be understood as "layer", that is, a layer of nozzle groups is arranged at a position of the lower portion of the pulverizing barrel 10, and one or more layers of nozzle groups are arranged above the layer of nozzle groups.

Through setting up N level nozzle group in the top of one-level nozzle group, the secondary material that returns to in the crushing barrel 10 by hierarchical section of thick bamboo 20 can be smashed by N level nozzle group, and new material is smashing along crushing barrel 10 to hierarchical section of thick bamboo 20 mobile in-process through one-level nozzle group and N level nozzle group, has improved the homogeneity of smashing back particle fineness to crushing efficiency has been promoted.

It should be noted that, referring to fig. 2, the jet mill is generally disposed along the vertical direction, and therefore, the "upper" and "lower" in the embodiment are described as the jet mill is disposed along the vertical direction.

As shown in fig. 1 and 2, the primary nozzle group includes a plurality of first nozzles 30 arranged at intervals in the circumferential direction of the milling drum 10, and the air injection directions of the plurality of first nozzles 30 meet at a point.

As shown in fig. 1 and 2, the N-stage nozzle group includes a plurality of second nozzles 40 arranged at intervals in the circumferential direction of the pulverizing cylinder 10. Specifically, as shown in fig. 3, the second nozzle 40 includes a main nozzle 41 and auxiliary nozzles 42, the auxiliary nozzles 42 are communicated with the main nozzle 41, the auxiliary nozzles 42 are arranged at an included angle with the main nozzle 41 or are arranged perpendicular to each other, and the auxiliary nozzles 42 are arranged at intervals along the periphery of the main nozzle 41. The air injection directions of the plurality of main nozzles 41 intersect at a point.

It is worth noting that each of the N-stage nozzle groups includes a plurality of second nozzles 40 arranged at intervals in the circumferential direction.

The second nozzle 40 is set as a main nozzle 41 and an auxiliary nozzle 42 arranged at an included angle with the main nozzle 41, so that the main nozzle 41 is used for crushing particles, the auxiliary nozzle 42 is used for increasing the air flow disturbance and particle collision near the main nozzle 41, the particles at dead angles can be crushed, and the crushing effect of the second nozzle 40 is improved.

As shown in fig. 1 and 2, a diameter reducing structure 60 is provided at an upper portion of the pulverizing cylinder 10, and an inner diameter of the diameter reducing structure 60 is smaller than an inner diameter of the classifying cylinder 20.

It should be noted that, referring to fig. 1 and 2, the diameter-reducing structure 60 also has an inner diameter smaller than the inner diameter of the milling drum 10. Therefore, the particles in the air flow flowing from the pulverizing cylinder 10 into the classifying cylinder 20 do not directly collide with the classifying structure 50, thereby reducing the wear of the classifying structure 50, prolonging the service life of the classifying structure 50, and reducing the production cost of the equipment.

In the present embodiment, as shown in fig. 1 and 2, the diameter reducing structure 60 includes a cylindrical barrel 61 and a tapered barrel 62, and both ends of the cylindrical barrel 61 are connected to the pulverizing barrel 10 and the classifying barrel 20 through the tapered barrel 62, respectively.

It should be noted that, referring to fig. 2, the lower end of the cylindrical drum 61 is connected to the pulverizing drum 10 through one tapered drum 62, and the upper end of the cylindrical drum 61 is connected to the classifying drum 20 through the other tapered drum 62. Therefore, the conical cylinder 62 is used to connect the cylindrical cylinder 61 with the milling cylinder 10 and the classifying cylinder 20, so as to ensure the smooth flowing of the air flow with particles in the milling cylinder 10 and the classifying cylinder 20.

As shown in fig. 1 and 2, the N-stage nozzle groups are disposed at the reducing structure 60, where N is equal to 1. That is, the N-stage nozzle group is provided with a layer of nozzles provided at the reducing structure 60, specifically, at the cylindrical barrel 61.

The particles entering from the feed inlet 11 are crushed in the crushing cylinder 10 and the reducing structure 60 and then enter the grading cylinder 20 for grading, fine particles are discharged through the discharge outlet 21, larger particles return to the reducing structure 60, and secondary crushing is carried out in the reducing structure 60 under the action of the second nozzle 40.

In the present embodiment, the first nozzle 30 and the main nozzle 41 are both laval nozzles, and the sub-nozzle 42 is a common nozzle.

It should be noted that, in the prior art, during the particle pulverization, about 75% of the particles in the powder material entering the classifying cylinder 20 are returned to the pulverizing cylinder 10 for secondary pulverization, and since the returned particles have already undergone primary pulverization, the returned particles have a smaller fineness than the particles newly introduced through the feed opening 11. In this embodiment, the same air pressure is introduced into the first nozzle 30 and the second nozzle 40, the air pressure introduced into the first nozzle 30 causes the first nozzle 30 to eject a supersonic gas jet to crush newly introduced particles, a part of the air pressure introduced into the second nozzle 40 is used for causing the main nozzle 41 to eject the supersonic gas jet to crush secondary materials in the diameter-reducing structure 60, and the other part causes the auxiliary nozzle 42 to eject air flow to disturb. Therefore, the flow velocity of the air flow ejected from the main nozzle 41 is small relative to the flow velocity of the air flow ejected from the first nozzle 30, that is, the pulverizing ability of the diameter-reducing structure 60 to particles is small compared to the pulverizing ability of the pulverizing barrel 10, and therefore, the pulverizing ability of the diameter-reducing structure 60 can be matched with the particles having smaller fineness in the diameter-reducing structure 60, and the uniformity of the fineness of the pulverized particles of the air flow pulverizer is improved.

As shown in fig. 1 and 2, the plurality of hierarchical structures 50 are provided, and the plurality of hierarchical structures 50 are provided at intervals along the circumferential direction of the hierarchical cylinder 20.

It is worth mentioning that the grading structure 50 comprises a driving portion and a grading wheel, and the driving portion is in transmission connection with the grading wheel so as to drive the grading wheel to rotate at a high speed by the driving portion.

It should be further noted that the arrangement of the driving portion and the classifying wheel, and the cooperation of the classifying wheel with the classifying cylinder 20 and the discharge port 21 can be arranged according to the arrangement mode in the prior art, and only the classifying wheel can realize the classified screening of the powder in the classifying cylinder 20 in the rotating process.

When the jet mill of the embodiment is used, the powder is introduced into the milling drum 10 through the feed inlet 11, the powder collides with the drum wall of the milling drum 10 under the action of the first nozzle 30 to be milled, the powder enters the reducing structure 60 along with the flow of the air flow, is milled again under the action of the second nozzle 40 and enters the classifying drum 20, fine particles are discharged from the discharge outlet 21 under the action of the classifying structure 50, larger particles return to the reducing structure 60 to be milled for the second time, and the particles after the secondary milling enter the classifying drum 20 along with the air flow again to be classified.

According to the above description, the present patent application has the following advantages:

1. the crushing efficiency and the particle fineness uniformity are improved;

2. the energy consumption of equipment is reduced;

3. the production cost of the equipment is reduced.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A jet mill, comprising:

the device comprises a crushing barrel (10), wherein a feed inlet (11) is formed in the crushing barrel (10) in a communicated mode, a primary nozzle group is arranged on the lower portion of the crushing barrel (10), at least N stages of nozzle groups are further arranged on the crushing barrel (10) and above the primary nozzle group, N is greater than or equal to 1, and N is a positive integer;

the grading cylinder (20) is communicated with the crushing cylinder (10), the grading cylinder (20) is further communicated with a discharge hole (21), a grading structure (50) is arranged on the grading cylinder (20), and the grading structure (50) is suitable for grading and screening powder in the grading cylinder (20).

2. A jet mill according to claim 1, characterized in that the set of nozzles of a stage comprises a plurality of nozzles spaced circumferentially along the milling drum (10).

3. A jet mill according to claim 2, wherein the jet directions of a plurality of said nozzles meet at a point.

4. A jet mill according to any one of claims 1-3, characterized in that the set of N stages of nozzles comprises several nozzles spaced along the circumference of the milling drum (10).

5. A jet mill according to claim 4, characterized in that each of the nozzles in the N-stage nozzle groups comprises a main nozzle (41) and an auxiliary nozzle (42), the auxiliary nozzle (42) is communicated with the main nozzle (41) and arranged in an included angle or mutually perpendicular manner, and the auxiliary nozzle (42) is arranged in a plurality of numbers at intervals along the periphery of the main nozzle (41).

6. A jet mill according to claim 5, characterized in that the jet directions of several of the main nozzles (41) meet at a point.

7. A jet mill according to any one of claims 1-3, characterized in that the upper part of the milling drum (10) is provided with a diameter reducing structure (60), the inner diameter of the diameter reducing structure (60) being smaller than the inner diameter of the classifying drum (20).

8. A jet mill according to claim 7, characterized in that N stages of said groups of nozzles are provided at said reducing structure (60), where N is equal to 1.

9. A jet mill according to any one of claims 1-3, characterized in that said staging structure (50) is provided in a plurality of numbers, a plurality of said staging structures (50) being spaced apart circumferentially of said staging drum (20).

10. A jet mill according to any one of claims 1-3, characterized in that the classifying structure (50) comprises a drive portion and a classifying wheel, the drive portion being adapted to drive the classifying wheel in rotation.