CN220803671U

CN220803671U - Pressurizing nozzle for jet mill

Info

Publication number: CN220803671U
Application number: CN202322150349.0U
Authority: CN
Inventors: 潘保安; 于杨; 顾皓昕
Original assignee: Xiran Technology Jiangsu Co ltd
Current assignee: Xiran Technology Jiangsu Co ltd
Priority date: 2023-08-10
Filing date: 2023-08-10
Publication date: 2024-04-19
Anticipated expiration: 2033-08-10

Abstract

The utility model relates to a pressurizing nozzle for an air flow mill, which comprises a nozzle and a threaded connection part arranged at one end of the nozzle; the end face of the threaded connection part is provided with an air inlet cavity, and the bottom of the air inlet cavity is provided with a plurality of air injection holes; the plurality of air injection holes are circumferentially distributed around the central axis of the nozzle, and each air injection hole is inclined towards the central axis of the nozzle; each air hole comprises a first air hole part and a second air hole part, wherein the first air hole part is communicated with the bottom of the air inlet cavity, the second air hole part is communicated with the first air hole part, the inner diameter of the first air hole part is kept consistent, and the inner diameter of the second air hole part is uniformly increased from one end communicated with the first air hole part to the other end. The utility model provides a pressurizing nozzle for an air flow mill, which solves the problem that the existing air flow mill porous nozzle causes the too large diffusion range of materials in a crushing cavity, so that the flow velocity of jet gas is reduced and the crushing efficiency of the materials is affected.

Description

Pressurizing nozzle for jet mill

Technical Field

The utility model relates to the technical field of pressurizing nozzles of air flow mills, in particular to a pressurizing nozzle for an air flow mill.

Background

The jet mill is a common crushing device for modern industrial production, and can form a complete material crushing production line by matching with equipment such as a cyclone separator, a fan and the like. The material crushed by the jet mill has high particle fineness and wide application range, such as silicon carbide, ceramic, PVC and the like. The working principle of the jet mill is that air or inert gas is compressed, filtered and dried and then is sprayed into a crushing cavity of the jet mill through a nozzle, so that materials in the crushing cavity repeatedly collide with the inner wall of the crushing cavity, rub and shear and then crush.

The jet nozzle has great influence on the flow speed and the direction of jet air flow, and the existing jet mill nozzle is divided into a single-hole nozzle and a multi-hole nozzle; under the same input condition, the porous nozzle can better enable the materials to diffuse, collide, rub, shear and crush in the crushing cavity, but the problem that the flow velocity of the jet gas is reduced due to the overlarge diffusion range of the materials in the crushing cavity exists, so that the crushing efficiency of the materials is affected.

Disclosure of utility model

The utility model overcomes the defects of the prior art, provides the pressurizing nozzle for the jet mill, and solves the problems that the jet gas flow velocity is reduced and the material crushing efficiency is affected due to the fact that the existing jet mill porous nozzle leads the material to be diffused in the crushing cavity to be too large.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a pressurizing nozzle for an air flow mill comprises a nozzle and a threaded connection part arranged at one end of the nozzle;

the end face of the threaded connection part is provided with an air inlet cavity, and the bottom of the air inlet cavity is provided with a plurality of air injection holes; the plurality of air injection holes are circumferentially distributed around the central axis of the nozzle, and each air injection hole is inclined towards the central axis of the nozzle;

Each air injection hole comprises a first air hole part and a second air hole part, the first air hole part is communicated with the bottom of the air inlet cavity, the second air hole part is communicated with the first air hole part, the inner diameters of the first air hole parts are kept consistent, and the inner diameters of the second air hole parts are uniformly increased from one end communicated with the first air hole part to the other end.

In a preferred embodiment of the present utility model, the air inlet cavity includes a first section, a second section, and a third section coaxially disposed, where the first section, the second section, and the third section are sequentially connected and smoothly transition, the inner diameters of the first section and the third section remain unchanged, the inner diameter of the second section increases uniformly from one end connected to the first section to the other end, and the inner diameter of the third section is larger than the inner diameter of the first section.

In a preferred embodiment of the present utility model, a gas injection hole is disposed in the middle of the bottom side of the third section.

In a preferred embodiment of the present utility model, the air inlet cavity includes a plurality of bucket grooves formed on an end surface of the threaded connection portion, wherein a diameter of each bucket groove gradually increases inward from the end surface of the threaded connection portion, and the plurality of bucket grooves are circumferentially distributed along a central axis of the nozzle.

In a preferred embodiment of the present utility model, the side wall of the bucket groove is arc-shaped.

In a preferred embodiment of the present utility model, a flow guiding part is disposed at a connection position between the plurality of bucket grooves, and the flow guiding part is disposed coaxially with the nozzle.

In a preferred embodiment of the present utility model, the number of the bucket-shaped slots is the same as the number of the air injection holes, and each air injection hole is communicated with one end with the smallest diameter of the bucket-shaped slot.

The utility model solves the defects existing in the background technology, and has the beneficial effects that:

The nozzle is connected with the equipment through the threaded connection part, an air source on the equipment can enter the air inlet cavity first, air pressure is increased when the air source enters the air injection hole, the air is sprayed outwards from the opening end of the second air hole part after passing through the first air hole part, and as each air injection hole inclines towards the central axis of the nozzle, a plurality of air flows sprayed out through the second air hole part can be converged and synthesized at the central axis outside the nozzle to form a clustered air flow, so that the diffusion range of the sprayed air is reduced, and meanwhile, the flow speed of the sprayed air flow and the material crushing efficiency can be increased.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view showing a structure of a pressurizing nozzle for jet mill according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic left-hand view of FIG. 1 in accordance with a preferred embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of FIG. 2 at A-A in accordance with a preferred embodiment of the present utility model;

FIG. 4 is a schematic illustration of the axially sectioned structure of FIG. 2 at A-A in a preferred embodiment of the utility model;

FIG. 5 is a schematic view showing the structure of a pressurizing nozzle for jet mill according to a second preferred embodiment of the present utility model;

FIG. 6 is a schematic diagram of the left-hand construction of FIG. 5 in accordance with a preferred embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of FIG. 6 at B-B in accordance with a preferred embodiment of the present utility model;

FIG. 8 is a schematic illustration of the axially sectioned structure of FIG. 6 at B-B in a preferred embodiment of the utility model;

Wherein, 1, a nozzle; 101. a threaded connection; 102. an air inlet cavity; 103. a gas injection hole; 1021. a first section; 1022. a second section; 1023. a third section; 1024. a bucket-type groove; 1025. a flow guiding part; 1031. a first air hole portion; 1032. and a second air hole portion.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples, which are simplified schematic illustrations of the basic structure of the utility model, which are presented only by way of illustration, and thus show only the structures that are relevant to the utility model.

In this embodiment, if a directional instruction (such as up, down, bottom, top, etc.) is provided, the directional instruction is merely used to explain the relative positional relationship between the components, the movement condition, etc. in a certain specific posture, and if the specific posture is changed, the directional instruction is changed accordingly. 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 implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally 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 to 8, a pressurizing nozzle for jet mill comprises a nozzle 1 and a screw connection part 101 arranged at one end of the nozzle 1;

the end face of the threaded connection part 101 is provided with an air inlet cavity 102, and the bottom of the air inlet cavity 102 is provided with a plurality of air injection holes 103; the plurality of air injection holes 103 are circumferentially distributed around the central axis of the nozzle 1, and each air injection hole 103 is inclined towards the central axis of the nozzle 1;

each gas injection hole 103 includes a first gas hole portion 1031, a second gas hole portion 1032, the first gas hole portion 1031 being communicated with the bottom of the gas inlet chamber 102, the second gas hole portion 1032 being communicated with the first gas hole portion 1031, the inner diameter of the first gas hole portion 1031 being kept uniform, the inner diameter of the second gas hole portion 1032 being increased uniformly from one end communicating with the first gas hole portion 1031 to the other end.

Specifically, the nozzle 1 is connected to a device through the threaded connection portion 101, an air source on the device is sprayed outwards through the air inlet cavity 102 and the air injection hole 103 on the nozzle 1, when the air enters the air inlet cavity 102, as shown in fig. 4 and 8, because the space occupied by the air injection hole 103 is small, the air pressure is increased when the air enters the air injection hole 103, the air is sprayed outwards from the opening end of the second air hole portion 1032 after passing through the first air hole portion 1031, and a plurality of air jets sprayed through the second air hole portion 1032 are converged and combined at the central shaft outside the nozzle 1 to form a cluster air flow, so that the diffusion of the sprayed air is reduced, and the flow speed of the sprayed air flow and the material crushing efficiency are increased.

In the above embodiment, as shown in fig. 3 and 7, each gas injection hole 103 is inclined toward the central axis of the nozzle 1, that is, from the end of the first gas hole portion 1031 connected with the gas inlet cavity 102 to the other end of the first gas hole portion 1031, the distance between the central axis of the first gas hole portion 1031 and the central axis of the nozzle 1 is gradually reduced, and the included angle between the central axis of the first gas hole portion 1031 and the central axis of the nozzle 1 is between 1 ° and 5 °, and in this embodiment, the included angle of 4 ° is preferred. The angle at which the second air hole portion 1032 is inclined is identical to the angle at which the first air hole portion 1031 is inclined.

Example 1

As shown in fig. 3 and 4, the air inlet cavity 102 includes a first section 1021, a second section 1022 and a third section 1023 which are coaxially arranged, the first section 1021, the second section 1022 and the third section 1023 are sequentially connected and smoothly transition, the inner diameters of the first section 1021 and the third section 1023 remain unchanged, the inner diameter of the second section 1022 uniformly increases from one end connected with the first section 1021 to the other end, and the inner diameter of the third section 1023 is larger than the inner diameter of the first section 1021. A plurality of gas injection holes 103 are conveniently added to the bottom side of the third section 1023.

Further, the middle part of the bottom side of the third section 1023 is provided with the air injection hole 103, and the middle part of the bottom side of the air inlet cavity 102 is additionally provided with the air injection hole 103, so that after the air nozzles circumferentially distributed along the central axis of the nozzle 1 jet the air flow, the air nozzles can be converged with the air flow jetted by the air nozzles at the middle part, the impact of outward diffusion after the convergence of multiple jet air flows is reduced, the diffusion of jet air is further reduced, and the jet air flow converged into one jet air flow has higher flow velocity while a certain diffusion range is ensured.

Example two

As shown in fig. 7 and 8, in this example, the structure of the air intake chamber 102 is further optimized, the air intake chamber 102 includes a plurality of bucket grooves 1024 formed on the end surface of the threaded connection portion 101, the diameter of each bucket groove 1024 gradually increases inward from the end surface of the threaded connection portion 101, and the plurality of bucket grooves 1024 are circumferentially distributed along the central axis of the nozzle 1. When the air source is input into the nozzle 1, as the number of the bucket-shaped grooves 1024 is the same as that of the air injection holes 103, and each air injection hole 103 is communicated with one end with the smallest diameter of the bucket-shaped groove 1024, the air source can be equally divided into parts which are the same as that of the air injection holes 103, the pressure of the air flow is gradually increased through the arc-shaped side wall of the bucket-shaped groove 1024, and finally the air flow is sprayed out from the opening end of the air nozzle at a higher speed, and the air flow is converged outside the nozzle 1 to form a small-range diffused clustered air flow, so that the pressure is higher and the impact force is stronger.

In the above embodiment, as shown in fig. 8, the connection between the plurality of bucket grooves 1024 is provided with the flow guiding portion 1025, and the flow guiding portion 1025 is disposed coaxially with the nozzle 1. The flow guide 1025 can uniformly guide the air source to the bottom of each bucket 1024, so that the pressure of each air flow ejected from the air injection holes 103 is kept consistent.

Working principle: the nozzle 1 is connected with equipment through the threaded connection part 101, an air source on the equipment can enter the air inlet cavity 102, air pressure is increased when the air source enters the air injection holes 103, the air is sprayed outwards from the opening end of the second air hole part 1032 after passing through the first air hole part 1031, and as each air injection hole 103 inclines towards the central axis of the nozzle 1, a plurality of air sprayed out through the second air hole part 1032 can be converged and synthesized into a cluster air flow at the central axis outside the nozzle 1, so that the diffusion range of the sprayed air is reduced, and meanwhile, the flow speed of the sprayed air flow and the crushing efficiency of materials can be increased.

The above-described preferred embodiments according to the present utility model are intended to suggest that, from the above description, various changes and modifications can be made by the person skilled in the art without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a supercharging nozzle for jet mill which characterized in that: comprises a nozzle (1) and a threaded connection part (101) arranged at one end of the nozzle (1);

An air inlet cavity (102) is formed in the end face of the threaded connection part (101), and a plurality of air injection holes (103) are formed in the bottom of the air inlet cavity (102); the plurality of air injection holes (103) are circumferentially distributed around the central axis of the nozzle (1), and each air injection hole (103) is inclined towards the central axis of the nozzle (1);

Each air injection hole (103) comprises a first air hole part (1031) and a second air hole part (1032), the first air hole part (1031) is communicated with the bottom of the air inlet cavity (102), the second air hole part (1032) is communicated with the first air hole part (1031), the inner diameters of the first air hole parts (1031) are kept consistent, and the inner diameters of the second air hole parts (1032) are uniformly increased from one end communicated with the first air hole part (1031) to the other end.

2. The pressurized nozzle for an air mill according to claim 1, wherein: the air inlet cavity (102) comprises a first section (1021), a second section (1022) and a third section (1023) which are coaxially arranged, wherein the first section (1021), the second section (1022) and the third section (1023) are sequentially connected and smoothly transition, the inner diameters of the first section (1021) and the third section (1023) are kept unchanged, the inner diameter of the second section (1022) is uniformly increased from one end connected with the first section (1021) to the other end, and the inner diameter of the third section (1023) is larger than the inner diameter of the first section (1021).

3. The pressurized nozzle for air flow grinding of claim 2, wherein: and the middle part of the bottom side of the third section (1023) is provided with an air injection hole (103).

4. The pressurized nozzle for an air mill according to claim 1, wherein: the air inlet cavity (102) comprises a plurality of bucket-shaped grooves (1024) formed in the end face of the threaded connection portion (101), the diameter of each bucket-shaped groove (1024) gradually increases inwards from the end face of the threaded connection portion (101), and the bucket-shaped grooves (1024) are circumferentially distributed along the central axis of the nozzle (1).

5. The pressurized nozzle for jet milling of claim 4, wherein: the side wall of the bucket-shaped groove (1024) is arc-shaped.

6. The pressurized nozzle for jet milling of claim 4, wherein: the connection parts among the bucket grooves (1024) are provided with flow guide parts (1025), and the flow guide parts (1025) and the nozzles (1) are coaxially arranged.

7. The pressurized nozzle for jet milling of claim 4, wherein: the number of the bucket-shaped grooves (1024) is the same as that of the air injection holes (103), and each air injection hole (103) is communicated with one end with the smallest diameter of the bucket-shaped groove (1024).