CN204320532U - A kind of miniature liquid atomizer - Google Patents

Abstract

The utility model discloses a small liquid atomizing nozzle, which comprises an inner nozzle and an outer nozzle, the inner nozzle is sleeved in the outer nozzle, and there is an annular gap between the inner nozzle and the outer nozzle; the hollow channel inside the inner nozzle is a liquid channel, The annular gap between the inner nozzle and the outer nozzle is a gas channel; the inner nozzle includes a cylindrical part and a tapered nozzle part; the inner wall of the outer nozzle matches the shape of the outer wall of the inner nozzle; the outlet of the inner nozzle is a liquid nozzle, and the inner nozzle The outlet of the annular tapering channel between the outer wall of the nozzle part and the inner wall of the nozzle part of the outer nozzle is a gas nozzle; the end face of the liquid nozzle is flush with the end face of the gas nozzle; the utility model adopts a two-channel external mixing structure, which can be used for Atomizing liquids with different viscosities, not only suitable for high-viscosity liquids, not only is it convenient to process, but also less difficult to assemble, with low assembly errors and very good atomization effect.

Description

A small liquid atomizing nozzle

technical field

The utility model relates to atomizing equipment for high-viscosity liquid, in particular to a small-sized liquid atomizing nozzle.

Background technique

In many occasions of industrial production, it is necessary to atomize small-flow high-viscosity liquids. Liquid atomization technology is widely used. For example, in the chemical industry, the reaction liquid is turned into fine droplets, which increases the contact area between the liquid and the gas, and improves the reaction rate between the gas and the liquid; The droplets evaporate in large quantities in the fire area, which can rapidly cool and isolate the oxygen at the burning object, and have a good effect on suppressing and extinguishing early fires.

High-viscosity liquids are suitable for different atomization methods than low-viscosity liquids. Low-viscosity liquids (such as light oil, water, etc.) are generally atomized by pressure at present, and the pressurized liquid is injected into the static or low-speed air flow at high speed through the nozzle. The liquid jet is unstable, broken and finally broken into small droplets. Pressure atomizing nozzles are generally single-fluid nozzles with a simple structure, but the atomization effect on high-viscosity liquids is not ideal. High-viscosity liquids (such as heavy oil, residual oil, coal-water slurry, adhesives, etc.) are mostly pneumatically atomized, and the high-speed airflow and low-speed liquid jets collide and rub against each other, so that the liquid jets are gradually broken into fine droplets. Liquid pneumatic atomization is better than pressure atomization. Since the pneumatic atomizing nozzle is a multi-fluid nozzle, the structure is relatively complicated compared with the pressure atomizing nozzle.

The atomization of small flow and high viscosity liquid should adopt pneumatic atomization method. If the flow parameter is small, the structure size of the nozzle will be small, and the processing and assembly of the nozzle will be difficult; It has a great impact, resulting in a decrease in the atomization effect. At present, there is a lack of an atomizing nozzle with a good atomization effect on high-viscosity liquid under the condition of small flow rate.

Utility model content

The problem to be solved by the utility model is to design a small-sized liquid atomizing nozzle with simple structure, easy processing and assembly, and good atomization effect on liquids of different viscosities, which can achieve better atomization for high-viscosity liquids under small flow conditions. effect.

The technical scheme of the utility model is as follows:

A small liquid atomizing nozzle, characterized in that it includes an inner nozzle and an outer nozzle, the inner nozzle is sleeved in the outer nozzle, and there is an annular gap between the inner nozzle and the outer nozzle; the hollow channel inside the inner nozzle is a liquid channel, and the inner nozzle The annular gap between the nozzle and the outer nozzle is a gas channel.

The inner nozzle includes a cylindrical portion and a tapered nozzle portion.

The inner wall of the outer nozzle matches the shape of the outer wall of the inner nozzle, and is also provided with a cylindrical part and a tapered nozzle part.

Several positioning blocks are arranged between the transition surface of the outer wall surface of the cylindrical part of the inner nozzle and the outer wall surface of the nozzle part of the inner nozzle and the transition surface of the inner wall surface of the cylindrical part of the outer nozzle and the inner wall surface of the nozzle part of the outer nozzle. Evenly distributed with the axis of the inner nozzle as the centerline. The positioning block is used to position the inner nozzle and the outer nozzle. It adopts an integrated design with the inner nozzle. The diameters of the inner walls of the shape are equal. When the inner nozzle is inserted into the outer nozzle, the two cylindrical walls are close to each other, realizing the radial positioning of the inner and outer nozzles; the conical positioning surface of the positioning block and the conical inner surface of the outer nozzle The cone angles of the wall surfaces are equal, and the two cone surfaces can be closely attached to each other to realize the axial positioning of the inner and outer nozzles. Therefore, when the nozzle is assembled, the positioning block can realize the radial and axial positioning of the inner and outer nozzles at the same time.

Between every two positioning blocks, there are thin grooves for circulating gas, and the thin grooves are arranged alternately with the positioning blocks. The number and size of the thin grooves are selected according to actual needs.

The positioning surface of the positioning block includes a cylindrical positioning surface and a conical positioning surface.

The cone angle of the nozzle part of the inner nozzle is 40°-70°, the cone angle of the nozzle part of the outer nozzle is greater than the cone angle of the nozzle part of the inner nozzle, so that a gradual formation is formed between the inner nozzle and the outer nozzle. Constricted gas channel.

The tail end of the inner nozzle is connected to the liquid delivery pipe through threads.

The outer nozzle is connected to the gas delivery pipe through threads.

The outlet of the inner nozzle is a liquid nozzle, and the outlet of the annular tapering channel between the outer wall surface of the nozzle part of the inner nozzle and the inner wall surface of the nozzle part of the outer nozzle is a gas nozzle. The nozzle is designed as an external mixing structure, and the outlet end surface of the inner nozzle is basically flush with the outlet end surface of the outer nozzle, with a slight contraction.

The working process of the nozzle: the liquid enters the inner channel of the inner nozzle through the liquid inlet and the liquid feeding pipe in the center, accelerates through the necking section, and then sprays out from the liquid nozzle in a cylindrical jet shape. The gas enters the outer nozzle through the gas inlet and the annular gas passage, is accelerated by the tapered passage between the inner wall surface of the nozzle part of the outer nozzle and the outer wall surface of the nozzle part of the inner nozzle, and is ejected from the gas nozzle. There is a certain angle between the low-speed liquid jet and the high-speed airflow at the outlet of the nozzle. When the two collide, the low-speed liquid jet is torn and gradually broken by the high-speed airflow, and finally a conical liquid mist composed of fine droplets is formed.

The beneficial effects of the utility model are as follows:

The nozzle of the utility model adopts a two-channel external mixing structure, which is less difficult to produce and process; the nozzle uses a pneumatic atomization method, which is beneficial to solve the problem of difficult atomization of high-viscosity liquids;

Through the above-mentioned special positioning block designed integrally with the inner nozzle, the inner nozzle and the outer nozzle are positioned radially and axially at the nozzle to ensure the shape and size of the annular gas nozzle, so that the air outlet velocity can be consistent with the design value , and keep the airflow sprayed from the annular nozzle as uniform as possible to avoid the phenomenon of partial spraying of the nozzle, thus ensuring the atomization effect of the nozzle;

The nozzle adopts a positioning block designed integrally with the inner nozzle, which reduces the processing error of the positioning block. By simultaneously positioning the inner and outer nozzles radially and axially, it is very helpful to ensure the shape and size of the annular gas nozzle. , the design of this fixed block position on the two-channel external mixing nozzle can reduce the difficulty of assembly and reduce assembly errors;

The nozzle of this structure can be used to atomize liquids of different viscosities, not only suitable for high viscosity liquids. In actual application, according to the actual application environment, suitable supporting design can be made for the nozzle, such as feeding method, installation method and cooling method; therefore, this is a liquid with wide adaptability, simple structure, easy processing and assembly Convenient, small liquid atomizing nozzle with good atomization effect.

Description of drawings

Fig. 1 is the structural representation of the liquid atomizing nozzle of the utility model;

Fig. 2 is the perspective view of the utility model;

Fig. 3 is a structural schematic diagram of the inner nozzle of the present invention.

Wherein, the reference signs are: 1 inner nozzle, 1-1 thread, 1-2 outer wall surface of inner nozzle cylindrical part, 1-3 outer wall surface of inner nozzle nozzle part, 2 outer nozzle, 3 positioning block, 3-1 Cylindrical positioning surface of positioning block, thin groove between 3-2 positioning blocks, conical positioning surface of 3-3 positioning block, 4 liquid spouts, 5 gas spouts.

Detailed ways

As shown in Figure 1-3, a small liquid atomizing nozzle includes an inner nozzle 1 and an outer nozzle 2, the inner nozzle 1 is sleeved in the outer nozzle 2; the hollow channel inside the inner nozzle 1 is a liquid channel, and the inner nozzle 1 and the The annular gap between the outer nozzles 2 is a gas channel.

The inner nozzle 1 includes a cylindrical portion and a conical nozzle portion, and the inner wall of the outer nozzle 2 is provided with a cylindrical portion and a conical nozzle portion matching the shape of the outer wall surface of the inner nozzle 1 .

There is an annular gap between the outer wall surface 1-2 of the cylindrical part of the inner nozzle, the outer wall surface 1-3 of the spray head part of the inner nozzle and the inner wall surface of the outer nozzle 2 .

The tail end of the inner nozzle 1 is connected to the liquid delivery pipe through a thread 1-1.

The outer nozzle 2 is connected to the gas delivery pipe by threads.

Several positioning blocks 3 are arranged between the transition surface of the outer wall surface 1-2 of the cylindrical part of the inner nozzle and the outer wall surface 1-3 of the nozzle part of the inner nozzle and the transition surface of the cylindrical part of the inner wall of the outer nozzle 2 and the nozzle part , the positioning blocks 3 can be evenly distributed with the axis of the inner nozzle 1 as the centerline.

The positioning block 3 is used for positioning the inner nozzle 1 and the outer nozzle 2, and it adopts an integrated design with the inner nozzle. The positioning surface of the positioning block 3 includes a cylindrical positioning surface 3-1 and a conical positioning surface 3-3; wherein the positioning The cylindrical positioning surface 3-1 of the block 3 is equal in diameter to the cylindrical inner wall of the outer nozzle 2. When the inner nozzle 1 is inserted into the outer nozzle 2, the two cylindrical walls are close to each other, realizing the alignment of the inner and outer nozzles. Radial positioning: the tapered positioning surface 33 of the positioning block 3 is equal to the cone angle of the inner wall surface of the spray head part of the outer nozzle 2, and these two tapered surfaces can be closely attached to each other to realize the axial positioning of the inner and outer nozzles. Therefore, when the nozzle is assembled, the positioning block 3 can realize the radial and axial positioning of the inner and outer nozzles 2 at the same time.

There are fine grooves 3-2 for circulating gas between every two positioning blocks 3, and the thin grooves 3-2 are arranged alternately with the positioning block 3, and the number and size of the thin grooves 3-2 are selected according to actual needs.

The cone angle of the shower head portion of the inner nozzle 1 is 40°-70°, and the cone angle angle of the shower head portion of the outer nozzle 2 is greater than the cone angle of the shower head portion of the inner nozzle 1, so that the inner nozzle 1 and the outer nozzle 2 to form a tapered gas channel.

The outlet of the inner nozzle 1 is a liquid nozzle 4 , and the outlet of the annular tapered channel between the outer wall surface 1 - 2 of the nozzle part of the inner nozzle and the inner wall surface of the nozzle part of the outer nozzle 2 is a gas nozzle 5 . The nozzle is designed as an external mixing structure, and the outlet end surface of the inner nozzle 1 is basically flush with the outlet end surface of the outer nozzle 2, with a slight contraction.

The working process of the nozzle: the liquid enters the inner channel of the inner nozzle 1 through the liquid inlet and the liquid feeding pipe in the center, and is accelerated by the necking section and then ejected from the liquid nozzle 4 in a cylindrical jet shape; the gas passes through the gas inlet and The annular gas passage enters the outer nozzle 2, and after being accelerated through the tapering channel between the inner wall surface of the outer nozzle 2 nozzle part and the outer wall surface 1-3 of the inner nozzle nozzle part, it is ejected from the gas nozzle 5; the low-speed liquid jet follows the There is a certain angle between the high-speed airflow at the outlet of the nozzle, and the two collide. The low-speed liquid jet is torn and gradually broken by the high-speed airflow, and finally a conical liquid mist composed of fine droplets is formed.

Claims (7)

1. A small liquid atomizing nozzle, characterized in that: it includes an inner nozzle (1) and an outer nozzle (2), the inner nozzle (1) is socketed in the outer nozzle (2), and the inner nozzle (1) and the outer nozzle There is an annular gap between (2); the hollow channel inside the inner nozzle (1) is a liquid channel, and the annular gap between the inner nozzle (1) and the outer nozzle (2) is a gas channel; the inner nozzle (1) includes A cylindrical part and a conical nozzle part, the inner wall of the outer nozzle (2) matches the shape of the outer wall of the inner nozzle (1), and a cylindrical part and a conical nozzle part are also provided; the inner nozzle (1) The outlet is a liquid nozzle (4), and the outlet of the annular tapering channel between the outer wall surface (1-3) of the nozzle part of the inner nozzle and the inner wall surface of the nozzle part of the outer nozzle (2) is a gas nozzle (5); the liquid nozzle (4 ) is flush with the end face of the gas nozzle (5). 2. A small liquid atomizing nozzle according to claim 1, characterized in that: the outer wall surface (1-2) of the cylindrical part of the inner nozzle and the outer wall surface (1-3) of the nozzle part of the inner nozzle Several positioning blocks (3) are arranged between the transition surface and the transition surface of the inner wall surface of the cylindrical part of the outer nozzle (2) and the inner wall surface of the nozzle part of the outer nozzle. 3. A small-sized liquid atomizing nozzle according to claim 2, characterized in that there are thin grooves (3-2) for circulating gas between every two positioning blocks (3). 4. A small liquid atomizing nozzle according to claim 2, characterized in that: the positioning surface of the positioning block (3) includes a cylindrical positioning surface (3-1) and a conical positioning surface (3-3 ). 5. A small liquid atomizing nozzle according to claim 1, characterized in that: the cone angle of the nozzle part of the inner nozzle (1) is 40°-70°, and the cone angle of the outer nozzle (2) The cone angle of the spray head part is larger than the cone angle of the spray head part of the inner nozzle (1). 6. A small liquid atomizing nozzle according to claim 1, characterized in that: the tail end of the inner nozzle (1) is connected to the liquid delivery pipe through a thread (1-1). 7. A small liquid atomizing nozzle according to claim 1, characterized in that: the outer nozzle (2) is connected to the gas delivery pipe through threads.