Flat jet mill with adjustable nozzle angle

Abstract

The utility model discloses a flat jet mill with adjustable nozzle angle, which is characterized in that an upper cover, a middle ring and a lower cover are mutually buckled to form a flat disc, a plurality of nozzle components are uniformly distributed on the middle ring along the circumferential direction, the middle ring comprises an upper middle ring and a lower middle ring, a plurality of hemispherical upper cavities are uniformly processed at the bottom of the upper middle ring along the circumferential direction; a plurality of hemispherical lower cavities corresponding to the upper cavities are uniformly formed in the top of the lower middle ring in the circumferential direction, the upper middle ring and the lower middle ring are spliced and welded up and down to form the middle ring, and the upper cavities and the lower cavities are spliced up and down to form a spherical mounting cavity; the nozzle assembly comprises a spherical nozzle mounting seat and a nozzle, the nozzle mounting seat is arranged in the mounting cavity and can rotate in the mounting cavity, the nozzle mounting seat can rotate in the mounting cavity, the angle of the nozzle can be adjusted, and the impact angle alpha of two adjacent air flows can be adjusted, so that the material can be crushed according to the characteristics of the crushed material; and the impact angle alpha is flexibly adjusted, so that the crushing effect and efficiency are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to airflow crushing equipment field especially, relate to a flat airflow pulverizer with adjustable nozzle angle. BACKGROUND

[0002] The flat airflow pulverizer belongs to one kind of airflow pulverizer equipment, is mainly used for crushing granular and powder materials, and is widely applied in chemical industry, medicine, new energy, electronics, ceramics and other fields. The structure of the flat airflow pulverizer disclosed by the patent is the mainstream structure on the market at present, and the crushing principle is to use external compressed air as a crushing medium, to connect a Laval supersonic nozzle through a pipeline, and then the compressed air will be converted into supersonic airflow, a plurality of nozzles are arranged on the annular middle circle and are at fixed angles with each other, so that a vortex is formed inside the crushing cavity and each jet will collide with each other, the raw materials are evenly fed into the feed inlet of the flat airflow pulverizer through a feeding device, and the raw materials are crushed under the vortex and jet impact mentioned above.

[0003] The properties of the materials crushed by the flat airflow pulverizer are different, for example, some materials have high hardness and large crystal brittleness, and in crushing such materials, the greater the impact angle alpha (the impact angle of adjacent two jets) is, the better, while some materials have low hardness, insufficient brittleness, and even certain viscosity and fiber characteristics, and in crushing such materials, the smaller the impact angle alpha is, the better, but the nozzle angle of the existing flat airflow pulverizer cannot be adjusted after the nozzle assembly 40 and the middle circle 20 are installed (refer to Figure 1 ), that is, the impact angle alpha of adjacent two jets cannot be changed, so that the flat airflow pulverizer is prone to problems such as insufficient impact force, easy wear of the middle circle lining and the nozzle when crushing materials with high hardness and large crystal brittleness, and is prone to problems such as excessive impact force, adhesion of the materials to the wall surface, and insufficient shearing force, which easily leads to adhesion of the materials together, affecting the crushing effect and processing efficiency of the equipment. INNOVATION CONTENT

[0004] The utility model aims at providing a flat airflow pulverizer with adjustable nozzle angle.

[0005] The utility model discloses an innovation lies in that the nozzle mounting seat is rotatable in the installation cavity, the angle of the nozzle is adjustable, and the impact angle alpha of adjacent two jets is adjustable, so that the impact angle alpha can be flexibly adjusted according to the characteristics of the crushed materials, thereby ensuring the crushing effect and efficiency, and prolonging the service life of the lining and the nozzle.

[0006] To achieve the above-mentioned utility model purposes, the technical scheme of the utility model is:

[0007] A flat airflow pulverizer with adjustable nozzle angle is formed by mutually buckling an upper cover, a middle ring and a lower cover into a flat disc, a discharge port and a feeding pipe are arranged on the upper cover, the feeding pipe is arranged in a tangent direction, a plurality of nozzle assemblies are evenly distributed on the middle ring in a circumferential direction, the middle ring comprises an upper middle ring and a lower middle ring, a plurality of semispherical upper cavities are evenly processed on the bottom of the upper middle ring in a circumferential direction, a plurality of semispherical lower cavities corresponding to the upper cavities are evenly processed on the top of the lower middle ring in a circumferential direction, the upper middle ring and the lower middle ring are vertically spliced and welded to form the middle ring, and the upper cavities and the lower cavities form a spherical mounting cavity after being vertically spliced; the nozzle assembly comprises a spherical nozzle mounting seat and a nozzle, the nozzle mounting seat is arranged in the mounting cavity and can rotate in the mounting cavity.

[0008] Further, an upper cover inner liner is arranged on the inner side of the upper cover, a lower cover inner liner is arranged on the inner side of the lower cover, a middle ring inner liner is arranged on the outer edge of the upper cover inner liner and the lower cover inner liner, the upper cover inner liner, the lower cover inner liner and the middle ring inner liner form a closed pulverizing cavity, the gas outlet of the nozzle is communicated with the pulverizing cavity, and a discharge inner liner is further arranged on the inner side of the discharge port.

[0009] Further, a discharge cone is arranged at the center of the lower cover inner liner, the sidewall of the discharge cone is arc-shaped, the top of the discharge cone is directed towards the discharge port, and the center of the discharge cone is coincided with the center of the discharge port.

[0010] Further, the bottom of the discharge inner liner extends into the pulverizing cavity, and the outer edge of the bottom of the discharge inner liner is provided with an arc-shaped material returning area which is concave inward.

[0011] The utility model has the advantages of:

[0012] Firstly, the nozzle mounting seat in the application can rotate in the mounting cavity, the angle of the nozzle can be adjusted, and the impact angle a of the adjacent two airflows can be adjusted, so that the impact angle a can be flexibly adjusted according to the characteristics of the pulverized material, thereby ensuring the pulverizing effect and efficiency, and prolonging the service life of the inner liner and the nozzle.

[0013] Secondly, the lower cover inner liner of the application is provided with a discharge cone at the center, which forms a guiding effect on the pulverized material, thereby ensuring smooth discharge.

[0014] Thirdly, the outer edge of the bottom of the discharge inner liner of the application is provided with an arc-shaped material returning area, when pulverizing, the material is guided again into the pulverizing cavity through the material returning area, and is pulverized again by the airflow, which helps to improve the pulverizing efficiency and effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1The existing nozzle assembly mounting structure is shown in the figure.

[0016] Figure 2 The structure of the utility model is shown in the figure.

[0017] Figure 3 The middle circle and nozzle mounting seat are shown in the figure.

[0018] Figure 4 The middle circle and nozzle mounting seat are shown in the figure.

[0019] Figure 5 The middle circle and nozzle mounting seat are shown in the figure.

[0020] In the figure: 10 is an upper cover, 11 is a discharge port, 12 is a feeding pipe, 13 is an upper cover lining, 14 is a discharge lining, 14.1 is a material return area, 20 is a middle circle, 21 is an upper middle circle, 22 is a lower middle circle, 23 is a mounting cavity, 23.1 is an upper cavity, 23.2 is a lower cavity, 24 is a middle circle lining, 30 is a lower cover, 31 is a lower cover lining, 32 is a discharge cone, 40 is a nozzle assembly, 41 is a nozzle mounting seat, and 42 is a nozzle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings.

[0022] A flat airflow pulverizer with adjustable nozzle angle is formed by mutually buckling an upper cover 10, a middle circle 20 and a lower cover 30 into a flat disc, the upper cover 10 is provided with a discharge port 11 and a feeding pipe 12, the feeding pipe 12 is arranged in a tangential direction, the middle circle 20 is provided with a plurality of nozzle assemblies 40 distributed uniformly in a circumferential direction, the middle circle 20 comprises an upper middle circle 21 and a lower middle circle 22, a plurality of semispherical upper cavities 23.1 are uniformly processed in a circumferential direction at the bottom of the upper middle circle 21, a plurality of semispherical lower cavities 23.2 corresponding to the upper cavities 23.1 are uniformly processed in a circumferential direction at the top of the lower middle circle 22, the upper middle circle 21 and the lower middle circle 22 are welded together to form the middle circle 20, and the upper cavities 23.1 and the lower cavities 23.2 form a spherical mounting cavity 23 after being welded together.

[0023] Further, the mounting connection mode of the nozzle 42 and the nozzle mounting seat 41 is the prior art, which will not be described here again.

[0024] Further, the upper cover 10 is internally provided with an upper cover lining 13, the lower cover 30 is internally provided with a lower cover lining 31, the outer edge of the upper cover lining 13 and the lower cover lining 31 is provided with a middle ring lining 24, the upper cover lining 13, the lower cover lining 31 and the middle ring lining 24 form a closed crushing cavity, the gas outlet of the nozzle 42 is communicated with the crushing cavity, and the discharge port 11 is internally provided with a discharge lining 14.

[0025] Further, the lower cover lining 31 is centrally provided with a discharge cone 32, the sidewall of the discharge cone 32 is arc-shaped, the top of the discharge cone 32 is directed towards the discharge port 11, and the center of the discharge cone 32 coincides with the center of the discharge port 11.

[0026] Further, the discharge lining 14 extends to the crushing cavity at the bottom, and the outer edge of the bottom of the discharge lining 14 is provided with an inwardly recessed arc-shaped material return area 14.1.

[0027] In the present application, a rotatable structure is formed between the nozzle mounting seat 41 and the middle ring 20, so that the angle of the gas flow sprayed by the nozzle 42 connected with the nozzle mounting seat 41 can be adjusted:

[0028] When crushing materials with large hardness and large brittleness, the angle of the nozzle mounting seat 41 is adjusted so that the impact angle a of the adjacent two gas flows is greater than 45 degrees. The greater the impact angle, the greater the impact force generated by the collision of the two gas flows, and the smaller the vortex ring radius formed at the impact point, which eventually approaches the center point. At this time, the collision strength will become larger and larger. In this way, the internal wear of the equipment for materials with large hardness will be reduced, and when the material brittleness is large, the impact energy can be more applied to opening the intergranular strength, and the crushing efficiency will be improved.

[0029] When crushing materials with small hardness, small brittleness, strong toughness and strong viscosity, the angle of the nozzle mounting seat 41 is adjusted so that the impact angle a of the adjacent two gas flows is less than 45 degrees. The smaller the impact angle, the smaller the impact force generated by the collision of the two gas flows, and the larger the vortex ring radius formed at the impact point, which eventually approaches the middle ring 20. At this time, the collision strength will become smaller and smaller, but the shear force will increase significantly. The two material flows driven by the supersonic gas flow are strongly rubbed at a small angle, which can tear some materials with strong toughness and strong viscosity and fibrous materials, which is difficult to achieve by conventional flat gas flow crushers.

[0030] The two material flows driven by the supersonic gas flow are strongly rubbed at a small angle, which can tear some materials with strong toughness and strong viscosity and fibrous materials, which is difficult to achieve by conventional flat gas flow crushers.

[0031] The described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. A flat airflow pulverizer with adjustable nozzle angle, comprising an upper cover (10), a middle ring (20), and a lower cover (30) interlocked to form a flat disc, wherein the upper cover (10) is provided with a discharge port (11) and a feed pipe (12), the feed pipe (12) being arranged along the tangential direction, and a plurality of nozzle assemblies (40) being evenly distributed circumferentially on the middle ring (20), characterized in that: The middle ring (20) comprises an upper middle ring (21) and a lower middle ring (22), the bottom of the upper middle ring (21) is uniformly processed with a plurality of semispherical upper cavities (23.1) along the circumference, the top of the lower middle ring (22) is uniformly processed with a plurality of semispherical lower cavities (23.2) corresponding to the upper cavities (23.1) along the circumference, the upper middle ring (21) and the lower middle ring (22) are vertically spliced and welded to form the middle ring (20), the upper cavities (23.1) and the lower cavities (23.2) are vertically spliced to form a spherical mounting cavity (23); the nozzle assembly (40) comprises a spherical nozzle mounting seat (41) and a nozzle (42), the nozzle mounting seat (41) is arranged in the mounting cavity (23) and can rotate in the mounting cavity (23).

2. A flat jet mill with adjustable nozzle angle according to claim 1, characterized in that: An upper cover inner liner (13) is arranged on the inner side of the upper cover (10), a lower cover inner liner (31) is arranged on the inner side of the lower cover (30), a middle ring inner liner (24) is arranged on the outer edge of the upper cover inner liner (13) and the lower cover inner liner (31), the upper cover inner liner (13), the lower cover inner liner (31) and the middle ring inner liner (24) form a closed crushing cavity, the gas outlet of the nozzle (42) is in communication with the crushing cavity, and a discharging inner liner (14) is further arranged on the inner side of the discharge port (11).

3. A flat jet mill with adjustable nozzle angle according to claim 2, characterized in that: A discharging cone (32) is arranged at the center of the lower cover inner liner (31), the sidewall of the discharging cone (32) is arc-shaped, the top of the discharging cone (32) faces the direction of the discharge port (11), and the center of the discharging cone (32) coincides with the center of the discharge port (11).

4. A flat jet mill with adjustable nozzle angle according to claim 2, characterized in that: The bottom of the discharging inner liner (14) extends into the crushing cavity, and the outer edge of the bottom of the discharging inner liner (14) is provided with an arc-shaped material returning area (14.1) which is recessed inward.

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