CN110918284A

CN110918284A - Medium atomizing nozzle, spraying device and spraying machine

Info

Publication number: CN110918284A
Application number: CN201911264610.1A
Authority: CN
Inventors: 赵斌; 李海强; 黄建华; 程磊
Original assignee: Jiangsu Xugong Construction Machinery Research Institute Co ltd
Current assignee: Jiangsu Xugong Construction Machinery Research Institute Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-03-27
Anticipated expiration: 2039-12-11
Also published as: CN110918284B

Abstract

The invention relates to the technical field of atomization, in particular to a medium atomizing nozzle, a spraying device and a spraying machine. The invention provides a medium atomizing nozzle, comprising: the nozzle comprises a nozzle body, and a gas flow channel, a liquid flow channel, a mixing cavity and a ventilation flow channel which are arranged in the nozzle body, wherein the mixing cavity is communicated with the gas flow channel and the liquid flow channel and is used for receiving liquid flowing out of the liquid flow channel and gas flowing out of an airflow flow channel; the vent channel is communicated with the gas channel and the liquid channel and guides part of gas in the gas channel to flow into the liquid channel before flowing into the mixing cavity. In the invention, the ventilation flow channel can lead gas into the liquid in advance before the liquid enters the mixing cavity, so that the gas-liquid mixing frequency is increased, and the atomization effect is improved.

Description

Medium atomizing nozzle, spraying device and spraying machine

Technical Field

The invention relates to the technical field of atomization, in particular to a medium atomizing nozzle, a spraying device and a spraying machine.

Background

Atomizing nozzle is an important component of equipment such as burner or sprayer, and is used for atomizing liquid and dispersing the liquid into liquid drops with small particle size.

The atomizing nozzles are classified into different types such as pressure atomizing nozzles and medium atomizing nozzles according to different atomizing modes. Wherein, the pressure atomizing nozzle is also called as a mechanical atomizing nozzle, and mainly realizes atomization by means of high-speed jet flow generated by liquid under the action of pressure difference; whereas media atomizing nozzles primarily utilize a high velocity jet of media (e.g., air or a vapor or other gas) impinging on a liquid to effect atomization.

In the related art, the medium atomizing nozzle can only realize one-time mixing of gas and liquid at most, and the atomizing effect is limited.

Disclosure of Invention

The invention provides a medium atomizing nozzle with better atomizing effect, a spraying device and a spraying machine.

The invention provides a medium atomizing nozzle, comprising:

a nozzle body;

the gas flow channel is arranged inside the nozzle body;

a liquid flow passage arranged inside the nozzle body;

the mixing cavity is arranged in the nozzle body, is communicated with the gas flow channel and the liquid flow channel and is used for receiving the liquid flowing out of the liquid flow channel and the gas flowing out of the gas flow channel; and

and the ventilation flow channel is communicated with the gas flow channel and the liquid flow channel and guides part of gas in the gas flow channel to flow into the liquid flow channel before flowing into the mixing cavity.

In some embodiments, the gas channel includes a gas inlet disposed at a side surface of the nozzle body, and the liquid channel includes a liquid inlet disposed at an axial end surface of the nozzle body.

In some embodiments, the diameter of the gas inlet is 1/4-1/2 of the diameter of the liquid inlet.

In some embodiments, the gas channel further comprises a first channel communicating with the gas inlet and the mixing chamber, and the liquid channel further comprises a second channel communicating with the liquid inlet and the mixing chamber, and the second channel is located outside the first channel along a radial direction of the nozzle body.

In some embodiments, the vent flow passage communicates the air inlet and the second flow passage.

In some embodiments, the gas flow passage further comprises a tapered bore, the tapered bore communicates the first flow passage and the mixing chamber, and a cross section of the tapered bore is tapered along a gas flow direction; and/or the liquid flow passage further comprises a swirl hole which is communicated with the second flow passage and the mixing cavity, and the outlet of the swirl hole is inclined towards the outlet side of the mixing cavity relative to the inlet of the swirl hole.

In some embodiments, the vent flow passage communicates between the bore and the second flow passage.

In some embodiments, the taper of the tapered bore is 20-40 °; and/or the included angle between the axis of the swirl hole and the axis of the nozzle body is 30-60 degrees; and/or the diameter of the swirl hole is 1/4-2/3 of the diameter of the liquid inlet.

In some embodiments, the minimum diameter of the second flow passage is 1/10-1/4 of the diameter of the liquid inlet.

In some embodiments, the second flow passage comprises a liquid passing cavity located furthest downstream of the second flow passage in the direction of liquid flow.

In some embodiments, the vent channel communicates between the gas channel and the liquid channel.

In some embodiments, the vent flow passage has a diameter 1/3-1/5 of the first flow passage diameter.

The atomization device provided by the invention comprises a supporting device and the medium atomization nozzle provided by the invention, wherein the medium atomization nozzle is arranged on the supporting device.

In some embodiments, the support device comprises a first spray ring and a second spray ring which are concentrically arranged and arranged in sequence from the inside to the outside, and the medium atomizing nozzle is arranged on at least one of the first spray ring and the second spray ring.

In some embodiments, the atomizing device further comprises a pressure atomizing nozzle disposed on at least one of the first spray ring and the second spray ring.

In some embodiments, the pressure atomizing nozzle and the media atomizing nozzle are disposed on one and the other of the first spray ring and the second spray ring, respectively.

In some embodiments, the diameter ratio of the first spray ring to the second spray ring is greater than or equal to 0.7 and less than 1, the pressure atomizing nozzle and the medium atomizing nozzle are inclined towards the centers of the first spray ring and the second spray ring, and the axes of the pressure atomizing nozzle and the medium atomizing nozzle and the axes of the first spray ring and the second spray ring form an included angle of 15-25 degrees; or the diameter ratio of the first spray ring to the second spray ring is less than 0.7, the axial lines of the nozzles arranged on the first spray ring are parallel to the axial lines of the first spray ring and the second spray ring in all the nozzles, the nozzles arranged on the second spray ring incline towards the centers of the first spray ring and the second spray ring, and an included angle of 15-25 degrees is formed between the axial line of the nozzle arranged on the second spray ring and the axial lines of the first spray ring and the second spray ring.

In some embodiments, the diameter ratio of the first spray ring to the second spray ring is greater than or equal to 0.7 and less than or equal to 0.9, and the axes of the pressure and media atomizing nozzles are at an angle of 15-25 ° to the axes of the first spray ring and the second spray ring.

In some embodiments, the atomizing device comprises a plurality of medium atomizing nozzles, the plurality of medium atomizing nozzles are arranged on the same spray ring at intervals, two adjacent medium atomizing nozzles are communicated through a connecting air pipe, and one medium atomizing nozzle is communicated with the air source through an air inlet pipe.

The sprayer provided by the invention comprises the atomizing device provided by the invention.

In the invention, the ventilation flow channel can lead gas into the liquid in advance before the liquid enters the mixing cavity, so that the gas-liquid mixing frequency is increased, and the atomization effect is improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only 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 shows a top view of a spray device provided by the present invention.

Fig. 2 shows a schematic enlarged view of part I of fig. 1.

Fig. 3 shows a right side view of the media atomizing nozzle of fig. 2.

Fig. 4 shows a cross-sectional view a-a of fig. 3.

Fig. 5 shows a right side view of the gas flow tube of fig. 4.

Fig. 6 shows a cross-sectional view B-B of fig. 5.

Fig. 7 shows a right side view of the mixing head of fig. 4.

Fig. 8 shows a cross-sectional view C-C of fig. 7.

Fig. 9 shows a cross-sectional view of a media atomizing nozzle in another embodiment.

Fig. 10 shows a cross-sectional view of the mixing head of fig. 9.

In the figure:

1. a support device; 11. a first spray ring; 12. a second spray ring;

2. a media atomizing nozzle; 21. a nozzle body; 211. a mounting seat; 212. a gas-liquid circulation pipe; 213. a mixing head; 214. a mixing head housing; 22. a gas flow channel; 221. an air inlet; 222. a first flow passage; 223. a taper hole; 23. a liquid flow passage; 231. a liquid inlet; 232. a second flow passage; 232a and a first liquid through hole; 232b and a second liquid through hole; 232c, a liquid through cavity; 233. a swirl hole; 24. a mixing chamber; 25. a ventilation flow channel; 26. a seal member;

3. a pressure atomizing nozzle;

4. a liquid inlet pipe;

5. an air inlet pipe;

6. connecting an air pipe;

7. a four-way joint;

8. a three-way joint.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 1-10 show exemplary configurations of a media atomizing nozzle and atomizing device of the present invention.

Referring to fig. 3-10, the present invention provides a media atomizing nozzle 2 comprising:

a nozzle body 21;

a gas flow passage 22 provided inside the nozzle body 21;

a liquid flow passage 23 provided inside the nozzle body 21;

a mixing chamber 24 provided inside the nozzle body 21, communicating with both the gas flow passage 22 and the liquid flow passage 23, and receiving the liquid flowing out of the liquid flow passage 23 and the gas flowing out of the gas flow passage 22; and

and a vent channel 25 communicating the gas channel 22 and the liquid channel 23 and guiding a portion of the gas in the gas channel 22 to flow into the liquid channel 23 before flowing into the mixing chamber 24.

Based on the above-mentioned setting, under the guiding action of the runner 25 of ventilating, partial gas can take place the mixture in advance in liquid runner 23 with liquid before liquid gets into mixing chamber 24 promptly, stir liquid and produce first atomizing, and the liquid after first atomizing can flow into mixing chamber 24 in with the gaseous remixing that gets into mixing chamber 24, produce the secondary atomization, because compare with the condition of only carrying out primary atomization in mixing chamber 24, the number of times of atomizing increases, gas can disperse into more tiny even liquid droplet with liquid, therefore, be favorable to realizing better atomization effect.

Therefore, the invention can increase the atomization frequency of the liquid before being sprayed out and effectively improve the atomization effect by adding the ventilation flow channel 25 on the basis of the mixing cavity 24.

Referring to fig. 3, 4 and 9, in some embodiments, the gas flow passage 22 includes a gas inlet 221, and further includes a first flow passage 222 communicating the gas inlet 221 with the mixing chamber 24; the liquid channel 23 includes an inlet 231, and further includes a second channel 232 communicating the inlet 231 with the mixing chamber 24.

Among them, the arrangement of the gas flow passage 22 and the liquid flow passage 23 may be various.

For example, in some embodiments, the gas inlet 221 is disposed at an axial end surface of the nozzle body 21, and the liquid inlet 231 is disposed at a side surface of the nozzle body 21. At this time, the medium atomizing nozzle 2 adopts a fluid introduction mode of axially feeding air and radially feeding liquid.

For another example, referring to fig. 4 and 9, in other embodiments, the gas inlet 221 is disposed on a side surface of the nozzle body 21, and the liquid inlet 231 is disposed on an axial end surface of the nozzle body 21. At this time, the medium atomizing nozzle 2 adopts a fluid introduction mode of axially feeding liquid and radially feeding gas. Compared with the fluid introducing mode of axial air inlet and radial air inlet, the fluid introducing mode of axial air inlet and radial air inlet is adopted, and the blocking risk of the liquid flow channel 23 is favorably reduced.

In the case of axial intake and radial intake, referring to fig. 3 and 4, in some embodiments, the second flow passage 232 is located outside the first flow passage 222 in the radial direction of the nozzle body 21. Under this condition, not only convenient processing, also conveniently arrange more through liquid pore structure along circumference in second runner 232 simultaneously, and because can each other be for each other stand-by between each through liquid pore structure, when through liquid pore structure more, even part through liquid pore structure takes place to block up among them, liquid still can flow into mixing chamber 24 through remaining through liquid pore structure, consequently, more be favorable to preventing that liquid runner 23 from blocking up, and then be favorable to avoiding leading to the problem of atomizing inefficacy because of liquid runner 23 blocks up.

4-9, in some embodiments, the gas flow passage 22 further includes a tapered bore 223, the tapered bore 223 communicating the first flow passage 222 and the mixing chamber 24, and a cross-section of the tapered bore 223 tapering along the gas flow direction. Through set up the taper hole 223 along the air current direction convergent between first flow path 222 and mixing chamber 24, can realize by the gentle transition of first flow path 222 to mixing chamber 24, be favorable to reducing gas pressure loss to make the air current blow off liquid more fully in mixing chamber 24, and then realize better atomization effect.

In addition, referring to fig. 4 and 9, in some embodiments, the liquid flow passage 23 further includes a swirl hole 233, the swirl hole 233 communicates the second flow passage 232 and the mixing chamber 24, and an outlet of the swirl hole 233 is inclined toward an outlet side of the mixing chamber 24 with respect to an inlet of the swirl hole 233. Based on this, the liquid flowing out from the second flow passage 232 flows into the mixing chamber 24 through the swirl holes 233, and since the swirl holes 233 are provided so that the liquid forms a swirl when entering the mixing chamber 24 and has a component velocity that coincides with the direction of the velocity of the gas flowing into the mixing chamber 24 from the first flow passage 222, it is more advantageous for the gas-liquid to be sufficiently mixed, thereby further improving the atomization effect.

Based on the structures and arrangement of the gas flow passage 22 and the liquid flow passage 23 in the above embodiments, the ventilation flow passage 25 may be provided in various ways to achieve premixing of gas and liquid.

Referring to fig. 4, in some implementations, the gas channel 25 communicates the gas channel 22 and the liquid channel 23 by communicating the gas inlet 221 and the second channel 232, so as to pre-mix the gas and the liquid in the liquid channel 23, thereby improving the atomization effect.

Alternatively, referring to fig. 9, in other embodiments, the ventilation channel 25 communicates the gas channel 22 and the liquid channel 23 by communicating the tapered hole 223 and the second channel 232, so as to achieve premixing of the gas and the liquid in the liquid channel 23, thereby improving the atomization effect.

In addition, in order to further improve the atomization effect, the configuration parameters of the components of the gas flow passage 22 and the liquid flow passage 23 may be set.

For example, in some embodiments, the diameter of the gas inlet 221 is set to 1/4-1/2 of the diameter of the liquid inlet 231.

In some embodiments, the minimum diameter of the second flow passage 232 is set at 1/10-1/4 of the diameter of the inlet 231.

In some embodiments, the taper of the tapered bore 223 is set at 20-40.

In some embodiments, the angle between the axis of swirl holes 233 and the axis of nozzle body 21 is set to 30-60 °.

In some embodiments, the diameter of swirl holes 233 is set to 1/4-2/3 of the diameter of inlet 231.

The shape and position parameters of the gas flow passage 22 and the liquid flow passage 23 are set by at least one mode, so that the gas and the liquid can flow more smoothly respectively, better gas-liquid ratio can be realized, and the atomization effect can be further improved.

The embodiments shown in fig. 3-10 are further described below.

First, the embodiments shown in fig. 3 to 8 will be described.

As shown in fig. 3 and 4, in this embodiment, the medium atomizing nozzle 2 includes a nozzle body 21, a seal member 26, and a fluid flow passage provided in the nozzle body 21, and the nozzle body 21 includes a mount 211, a gas-liquid flow pipe 212, a mixing head 213, and a mixing head housing 214; the fluid flow channels include a gas flow channel 22, a liquid flow channel 23, a mixing chamber 24, and a vent flow channel 25.

As can be seen from fig. 4, in this embodiment, mounting seat 211, gas-liquid flow pipe 212, mixing head 213 and mixing head housing 214 are all of a revolving structure, and mounting seat 211, gas-liquid flow pipe 212 and mixing head housing 214 are coaxially connected in sequence, and mixing head 213 is coaxially disposed in mixing head housing 214 with mixing head housing 214 and is commonly limited by mixing head housing 214 and gas-liquid flow pipe 212.

Specifically, an axial first end of gas-liquid flow pipe 212 is inserted into mounting seat 211 coaxially with mounting seat 211 and is screwed with mounting seat 211, while an axial second end of gas-liquid flow pipe 212 is inserted into mixing head housing 214 coaxially with mixing head housing 214 and is screwed with mixing head housing 214, and gas-liquid flow pipe 212 is sealed with mounting seat 211 and mixing head housing 214 by seal member 26 (e.g., a packing); mixing head 213 sets up in mixing head dustcoat 214 to be located the one side of keeping away from mount pad 211 of gas-liquid flow through pipe 212, the axial first end of mixing head 213 and the axial second end terminal surface butt of gas-liquid flow through pipe 212, the axial second end of mixing head 213 has the necking down portion, the necking down portion inserts in the centre bore of the one end of keeping away from mount pad 211 of mixing head dustcoat 214, and the shaft shoulder butt is on the inner wall of keeping away from gas-liquid flow through pipe 212 of the inside cavity of mixing head dustcoat 214, thereby realize the restriction to mixing head 213 axial and radial displacement.

With the above arrangement, nozzle body 21 has an overall shape of a revolution solid whose central axis is collinear with the central axes of mount 211, gas-liquid flow duct 212, mixing head 213, and mixing head housing 214, that is, whose axial and radial directions coincide with the axial and radial directions of mount 211, gas-liquid flow duct 212, mixing head 213, and mixing head housing 214. The mount 211, the gas-liquid flow pipe 212, and the mixing head cover 214 are sequentially screwed and sealed by the seal 26, and the gas-liquid flow pipe 212, the mixing head 213, and the mixing head cover 214 are press-sealed by end-face fitting. Thus, the nozzle body 21 has a simple and compact structure, is convenient to assemble and disassemble, is convenient to maintain, has good sealing performance, and is convenient for the arrangement of fluid flow channels.

The structure and arrangement of the fluid flow path will be described next.

As shown in FIGS. 4-8, in this embodiment, gas flow passage 22 is provided in gas-liquid flow line 212 and mixing head 213 for directing the gas flow toward mixing chamber 24 for mixing with the liquid entering mixing chamber 24 via liquid flow passage 23 for atomization. Specifically, as can be seen from fig. 4 and 6, the gas flow passage 22 includes a gas inlet 221, a first flow passage 222, and a tapered hole 223 that are sequentially communicated along the gas flow direction.

The gas inlet 221 is provided on a side surface of the gas-liquid flow pipe 212, communicates with the external environment, and supplies a gas flow into the gas flow passage 22. Gas inlet 221 is vertically disposed with its axis in the radial direction of gas-liquid flow duct 212. And the diameter of the gas inlet 221 is 1/4-1/2 of the diameter of the liquid inlet 231.

First flow passage 222 communicates gas inlet 221 with a tapered bore 223, is disposed in gas-liquid flow passage 212, is a blind bore extending from an axial second end to an axial first end of gas-liquid flow passage 212, and is disposed transversely with its axis collinear with the axis of gas-liquid flow passage 212.

A tapered bore 223 communicates between the first flow passage 222 and the mixing chamber 24, is disposed on the mixing head 213, is disposed transversely, and has an axis that is collinear with the axis of the mixing head 213 such that the tapered bore 223 is in coaxial communication with the first flow passage 222, the inlet and outlet of the tapered bore 223 communicate with the first flow passage 222 and the mixing chamber 24, respectively, and the tapered bore 223 tapers in cross-section in a direction from the inlet to the outlet of the tapered bore 223. specifically, the tapered bore 223 has a taper α of 20-40.

With the above arrangement, the inlet of the gas inlet 221 and the outlet of the tapered hole 223 form the inlet and the outlet of the gas flow passage 22, respectively.

The liquid flow channel 23 is used to guide the liquid to the mixing chamber 24 to be mixed with the gas entering the mixing chamber 24 through the gas flow channel 22, so as to achieve atomization. As shown in fig. 4 to 8, in this embodiment, the liquid flow passage 23 includes a liquid inlet 231, a second flow passage 232, and a swirl hole 223 which are communicated in this order in the liquid flow direction.

The liquid inlet 231 is a central hole of the mounting seat 211, is disposed on the mounting seat 211, extends from an axial end surface of the mounting seat 211, which is far away from the mixing head housing 214, to an axial first end of the gas-liquid circulation pipe 212, and is coaxially disposed with the mounting seat 211.

The second flow passage 232 communicates with the liquid inlet 231 and the swirl hole 233, is disposed radially outside of the first flow passage 222, and includes a liquid passing hole structure and a liquid passing chamber 232c that are sequentially communicated along the liquid flow direction. The liquid passing hole structure is provided on the gas-liquid passing pipe 212, and includes a first liquid passing hole 232a and a second liquid passing hole 232b that are sequentially communicated along the liquid flow direction. The first and second

liquid passage holes

232a and 232b are coaxially arranged and are located radially outward of the first flow channel 222. As shown in fig. 3 and 5, a plurality of (specifically, 4) liquid passing hole structures are uniformly distributed on the gas-liquid passing pipe 212 in the circumferential direction. A liquid passing chamber 232c is provided between gas-liquid flow line 212, mixing head 213 and mixing head housing 214, and communicates liquid passing hole structure with swirl hole 233, which is the most downstream portion of second flow path 232 in the liquid flow direction. Of the first, second, and liquid passing

holes

232a, 232b, and 232c, the second liquid passing hole 232b has the smallest radial dimension, and has a diameter that is the smallest diameter of the second flow passage 232. Specifically, in this embodiment, the diameter of the second liquid passing hole 232b is 1/10-1/4 of the diameter of the liquid inlet 231.

The swirl holes 233 are provided obliquely on the mixing head 213 and communicate the liquid passing chamber 232c and the mixing chamber 24. specifically, the inlet and outlet of the swirl holes 233 communicate with the liquid passing chamber 232c and the mixing chamber 24, respectively, and the axis of the swirl holes 233 is inclined toward the outlet side of the mixing chamber 24 in the direction from the inlet to the outlet of the swirl holes 233. more specifically, the angle β between the axis of the swirl holes 233 and the axis of the mixing chamber 24 is 30 to 60. and the diameter of the swirl holes 233 is 1/4 to 2/3 of the diameter of the liquid inlet 231. as shown in FIG. 8, a plurality of (e.g., 4) swirl holes 233 are uniformly distributed along the circumferential direction of the mixing head 213.

Based on the above arrangement, the inlet of the liquid inlet 231 and the outlet of the swirl hole 233 form the inlet and the outlet of the liquid flow passage 23, respectively. And the liquid inlet direction of the liquid flow passage 22 is perpendicular to the liquid inlet direction of the gas flow passage 23, and the liquid inlet directions are respectively along the radial direction and the axial direction of the nozzle body 21, so that the medium atomizing nozzle 2 of the embodiment adopts a fluid introducing mode of axially feeding liquid and radially feeding gas.

The mixing chamber 24 communicates with both the outlet of the liquid flow passage 22 and the outlet of the liquid flow passage 23, communicates with the external environment, and receives the gas flowing out of the gas flow passage 22 and the liquid flowing out of the liquid flow passage 23, mixes the gas and liquid therein, and ejects the mixed fluid to the outside of the medium atomizing nozzle 2. As shown in fig. 4 and 8, in this embodiment, the mixing chamber 24 is provided on the mixing head 213 and is arranged coaxially with the mixing head 213 so that the mixing chamber 24 becomes a center hole of the mixing head 213. And the axial first end and the axial second end of the mixing chamber 24 are respectively communicated with the taper hole 223 and the external environment, and at the same time, the side wall of the mixing chamber 24 is penetrated by the swirl hole 233. Thus, the mixing chamber 24 forms a spray hole, the liquid in the liquid channel 23 and the gas in the gas channel 22 can both flow into the mixing chamber 24, and the liquid and the gas entering the mixing chamber 24 can be instantly mixed and sprayed out to form water mist. The outlet of the mixing chamber 24 is open at the end face of the axial second end of the mixing chamber 24.

The vent channel 25 communicates between the gas channel 22 and the liquid channel 23 so that the liquid in the liquid channel 23 can be pre-mixed with a portion of the gas in the gas channel 22 before flowing into the mixing chamber 24 to improve atomization. Specifically, as shown in fig. 4 and 6, in this embodiment, the breather flow path 25 is provided on the gas-liquid circulation pipe 212, and the inlet and the outlet thereof communicate with the gas inlet 221 and the liquid circulation chamber 232c, respectively. As can be seen from fig. 4, the vent flow passage 25 axis is parallel to the axis of the nozzle body 21, and the vent flow passage 25 is arranged radially outward of the first flow passage 222. In this case, the ventilation flow channels 25 are alternately arranged in the circumferential direction, for example, in sequence with the liquid passage hole structure.

Based on the above arrangement, after entering the gas inlet 221, the gas is divided into two paths, the first path has a smaller gas flow rate and flows into the liquid through cavity 232c through the gas flow channel 25, and the second path has a larger gas flow rate and flows into the mixing cavity 24 through the first flow channel 222 and the tapered hole 223 in sequence. After the first path of gas enters the liquid through cavity 232c, the first path of gas is premixed with liquid in the liquid through cavity 232c, primary atomization of the liquid is achieved by disturbing the liquid in the liquid through cavity 232c, the liquid after primary atomization flows into the mixing cavity 24 through the swirl holes 233 and can be mixed with the second path of gas flowing into the mixing cavity 24 again, and under the action of the high-pressure second path of gas, the gas-liquid mixture is atomized and sprayed out.

Because the gas and the liquid are mixed twice in sequence, the mixing frequency is increased, and a two-stage atomization process is formed, so that the atomization effect is better, and the particle size of the fog drops is smaller.

In this embodiment, the vent flow passage 25 has a diameter 1/3-5/1 of the diameter of the first flow passage 222. Like this, on the one hand, the proportion of the gas flow of flowing through first runner 222 and the runner 25 of ventilating is more reasonable, can realize better atomization effect, and on the other hand, also be convenient for arrange a plurality of runners 25 of ventilating, further improve atomization effect.

Next, another embodiment shown in fig. 9-10 will be described.

As shown in fig. 9 to 10, this embodiment differs from the embodiment shown in fig. 3 to 8 mainly in that in this embodiment, the gas flow passage 23 and the liquid flow passage 22 are communicated by the communication tapered hole 223 with the liquid flow chamber 232c instead of the communication between the gas inlet 221 and the liquid flow chamber 232c of the gas flow passage 25.

Specifically, as can be seen from fig. 9 and 10, in this embodiment, the vent channel 25 is provided on the mixing head 213, and the inlet and the outlet communicate with the tapered hole 223 and the liquid passing chamber 232c, respectively. The axis of the ventilation flow path 25 is perpendicular to the axis of the nozzle body 21, that is, the axis of the ventilation flow path 25 is along the radial direction of the nozzle body 21.

Based on the above arrangement, after the gas entering from the gas inlet 221 reaches the tapered hole 223 through the first flow channel 222, a part of the gas enters the liquid through cavity 232c through the gas through flow channel 25 to be premixed with the liquid, and the other part of the gas continues to flow into the mixing cavity 24 through the tapered hole 223 to be mixed with the liquid entering the mixing cavity 24 again, thereby realizing two times of atomization of the liquid.

In the foregoing two embodiments, the gas-liquid premixing is realized by the gas channel 25 introducing part of the gas in the gas channel 23 into the liquid through cavity 232c at the gas inlet 221 and the taper hole 223, respectively, but the embodiment of the present invention is not limited to this, for example, in other embodiments, the gas channel 25 may communicate the first channel 222 with the liquid through cavity 232c, and the gas-liquid premixing is realized by introducing part of the gas in the gas channel 23 into the liquid through cavity 232c at the first channel 222; alternatively, the communication position between the liquid flow passage 25 and the liquid flow passage 22 may be a portion other than the liquid passage chamber 232c such as a liquid passage hole structure, so that the premixing does not occur in the liquid passage chamber 232c, but occurs in other portions of the liquid flow passage 22 such as the liquid passage hole structure.

In addition, in the foregoing two embodiments, the axis of the ventilation flow passage 25 is parallel to or perpendicular to the axis of the nozzle body 21, but in other embodiments, the axis of the ventilation flow passage 25 may be arranged obliquely with respect to the axis of the nozzle body 21, that is, in the present invention, the axis of the ventilation flow passage 25 may be parallel to or intersect with the axis of the nozzle body 21.

In summary, the gas-liquid premixing is realized by adding the ventilation flow channel 25 in the medium atomizing nozzle 2, which is beneficial to refining and uniform droplet particle size and improving the atomizing effect.

The medium atomizing nozzle 2 of the present invention can be applied to various spraying devices. For example, it can be used in a burner, in which case the liquid fed by the medium atomizing nozzle 2 is fuel oil. For example, the medium atomizing nozzle 2 may be used in a spray ring of a spraying machine, in which case the liquid introduced by the medium atomizing nozzle is water.

The use of the medium-atomizing nozzle 2 according to the invention in a spraying device is described in the following with reference to fig. 1-2.

As shown in fig. 1-2, the spraying device comprises a support device 1 and a medium atomizing nozzle 2 according to the invention, which medium atomizing nozzle 2 is arranged on the support device 1.

In some embodiments, the spraying device is a spraying ring of a spraying machine, the support device 1 comprises a first spraying ring 11 and a second spraying ring 12 which are concentrically arranged and arranged from inside to outside, and the medium atomizing nozzle 2 is arranged on at least one of the first spraying ring 11 and the second spraying ring 12.

In the related art, only pressure atomizing nozzles are generally used in the spraying machine, i.e., the pressure atomizing nozzles are arranged on the first spray ring 11 and the second spray ring 12.

The medium atomizing nozzle is applied to the sprayer, and compared with the pressure atomizing nozzle, the medium atomizing nozzle is smaller in atomizing particle size and less in water consumption, so that the atomizing effect is improved, the operation time of the sprayer is prolonged, the medium atomizing nozzle is atomized through gas, the blocking risk is low, and the working reliability of the sprayer is improved.

In particular, the medium atomizing nozzle 2 of the present invention can increase the liquid atomizing frequency and improve the atomizing effect based on the combined action of the air flow passage 25 and the mixing chamber 24, and therefore, when the medium atomizing nozzle 2 of the present invention is applied to a spraying machine, the dust suppression effect can be significantly improved.

As shown in fig. 1-2, in some embodiments the atomizing device comprises not only the medium atomizing nozzle 2 but also the pressure atomizing nozzle 3, and the pressure atomizing nozzle 3 is arranged on at least one of the first spray ring 11 and the second spray ring 12.

Because the medium atomizing nozzle 2 and the pressure atomizing nozzle 3 are included, the atomizing device of the invention becomes a composite atomizing device, integrates the advantages of the medium atomizing nozzle 2 and the pressure atomizing nozzle 3, can realize an atomizing process with less water consumption, difficult blockage and good atomizing effect on the basis of not excessively increasing the cost, improves the dust suppression effect and improves the dust suppression efficiency.

In the embodiment comprising both medium atomizing nozzles 2 and pressure atomizing nozzles 3, there are various arrangements of medium atomizing nozzles 2 and pressure atomizing nozzles 3.

In some embodiments, both the medium atomizing nozzles 2 and the pressure atomizing nozzles 3 are arranged on both the first spray ring 11 and the second spray ring 12. At this time, both the inner ring and the outer ring of the spraying device are simultaneously provided with the medium atomizing nozzle 2 and the pressure atomizing nozzle 3.

In other exemplary embodiments, the media atomization nozzles 2 are arranged on only one of the first spray ring 11 and the second spray ring 12, while the pressure atomization nozzles 3 are arranged on both the first spray ring 11 and the second spray ring 12. For example, the medium atomizing nozzles 2 are arranged only on the first spray ring 11, while the pressure atomizing nozzles 3 are arranged both on the first spray ring 11 and on the second spray ring 12. In this case, both medium atomizing nozzles 2 and pressure atomizing nozzles 3 are arranged on the first spray ring 11, while only pressure atomizing nozzles 3 are arranged on the second spray ring 12. For another example, the medium atomizing nozzles 2 are arranged only on the second spray ring 12, while the pressure atomizing nozzles 3 are arranged both on the first spray ring 11 and on the second spray ring 12. In this case, only the pressure atomizing nozzles 3 are arranged on the first spray ring 11, while both the medium atomizing nozzles 2 and the pressure atomizing nozzles 3 are arranged on the second spray ring 12.

In still other embodiments, the pressure atomizing nozzles 3 are arranged on only one of the first spray ring 11 and the second spray ring 12, while the medium atomizing nozzles 2 are arranged on both the first spray ring 11 and the second spray ring 12. For example, the pressure atomizing nozzles 3 are arranged only on the first spray ring 11, while the medium atomizing nozzles 2 are arranged both on the first spray ring 11 and on the second spray ring 12. In this case, both medium atomizing nozzles 2 and pressure atomizing nozzles 3 are arranged on the first spray ring 11, while only medium atomizing nozzles 2 are arranged on the second spray ring 12. For example, the pressure atomizing nozzles 3 are arranged only on the second spray ring 11, while the medium atomizing nozzles 2 are arranged both on the first spray ring 11 and on the second spray ring 12. In this case, only the medium atomization nozzles 2 are arranged on the first spray ring 11, while both the medium atomization nozzles 2 and the pressure atomization nozzles 3 are arranged on the second spray ring 12.

Referring to fig. 1-2, in further embodiments, the pressure atomizing nozzles 3 and the media atomizing nozzles 2 are arranged on one and the other of the first spray ring 11 and the second spray ring 12, respectively. At this time, one and the other of the medium atomizing nozzle 2 and the pressure atomizing nozzle 3 are provided on the inner ring and the outer ring of the spray device, respectively. Because the nozzles of the same type are arranged on the same spray ring and have similar pipeline connection requirements, the arrangement mode facilitates pipeline arrangement, is favorable for simplifying the structure and saves the cost.

For example, when a plurality of medium atomizing nozzles 2 are all arranged on the same spray ring, referring to fig. 2, two adjacent medium atomizing nozzles 2 may be communicated through a connecting gas pipe 6, and one of the medium atomizing nozzles 2 is communicated with a gas source through a gas inlet pipe 5. At this moment, all medium atomizing nozzles 2 are supplied with air by the same air inlet pipe 5, so that the number of the air inlet pipes 5 can be obviously reduced, and the structure of the spraying device is effectively simplified.

And, when all medium atomizing nozzles 2 are arranged on the same spray ring and all pressure atomizing nozzles 3 are arranged on the other spray ring, it is also convenient to supply water to all medium atomizing nozzles 2 and pressure atomizing nozzles 3 by using the same liquid inlet pipe 4.

Specifically, in the embodiment shown in fig. 1-2, the liquid inlet pipe 4 is welded below the first spray ring 11 and the second spray ring 12, the plurality of medium atomizing nozzles 2 are arranged on the first spray ring 11 at intervals, the plurality of pressure atomizing nozzles 3 are arranged on the second spray ring 12 at intervals, all the medium atomizing nozzles 2 and all the pressure atomizing nozzles 3 are communicated with the liquid inlet pipe 4, meanwhile, two adjacent medium atomizing nozzles 2 are in gas communication with each other through the connecting gas pipe 6, and one medium atomizing nozzle 2 located above the liquid inlet pipe 4 is simultaneously communicated with the gas inlet pipe 5.

More specifically, the pressure atomizing nozzle 3 is screwed with the second spray ring 12; the medium atomizing nozzle 2 is in threaded connection with the first spray ring 11 through a mounting seat 211; and the air inlets 221 of the medium atomizing nozzles 2 positioned above the liquid inlet pipe 4 are communicated with the connecting air pipe 6 and the air inlet pipe 5 through a four-way joint 7, and the air inlets 221 of the rest medium atomizing nozzles 2 are communicated with the connecting air pipe 6 through a three-way joint 8.

Based on the above arrangement, water provided by the liquid supply source can enter each nozzle through the same liquid inlet pipe 4, gas provided by the gas source can enter each medium atomizing nozzle 2 through the same gas inlet pipe 5, and the pipeline is simple.

In addition, the medium atomizing nozzle 2 adopts a fluid introducing mode of axially feeding water and radially feeding air, so that the structure is further simplified, and the processing is convenient. Because, when the medium atomizing nozzle 2 adopts the fluid introducing mode of axial water inlet and radial air inlet, the air inlet 221 and the liquid inlet 231 of the medium atomizing nozzle 2 are respectively positioned on the side surface and the axial end surface of the medium atomizing nozzle 2, the gas communication between the adjacent medium atomizing nozzles 2 is more conveniently realized by utilizing the connecting gas pipe 6, and the liquid inlet pipe 4 and the gas inlet pipe 5 are more conveniently arranged according to the mode shown in the figure.

In addition, the invention also designs the posture of the nozzle on the supporting device 1 so as to further improve the atomization dust suppression effect.

In some embodiments, the diameter ratio of the first spray ring 11 to the second spray ring 12 is greater than or equal to 0.7 and less than 1, the pressure atomizing nozzles 3 and the media atomizing nozzles 2 are inclined toward the centers of the first spray ring 11 and the second spray ring 12, and the axes of the pressure atomizing nozzles 3 and the media atomizing nozzles 2 form an angle of 15-25 ° with the axes of the first spray ring 11 and the second spray ring 12. For example, the diameter ratio of the first spray ring 11 to the second spray ring 12 is greater than or equal to 0.7 and less than or equal to 0.9, and the axes of the pressure atomizing nozzles 3 and the medium atomizing nozzles 2 form an angle of 15 to 25 ° with the axes of the first spray ring 11 and the second spray ring 12.

In these embodiments, the diameters of the first spray ring 11 and the second spray ring 12 are not very different, and the medium atomizing nozzle 2 and the pressure atomizing nozzle 3 are installed according to the installation angle, which is more beneficial to enabling the sprayed water mist to be in the outlet range of the spraying machine, and reducing the outward divergence of the water mist, thereby facilitating the water mist to be conveyed to a longer distance and realizing the spraying process of the longer distance.

In other embodiments, the diameter ratio of the first spray ring 11 to the second spray ring 12 is less than 0.7, in all the nozzles, the axis of the nozzle arranged on the first spray ring 11 is parallel to the axis of the first spray ring 11 and the axis of the second spray ring 12, the nozzle arranged on the second spray ring 12 is inclined towards the center of the first spray ring 11 and the center of the second spray ring 12, and the axis of the nozzle arranged on the second spray ring 12 forms an included angle of 15-25 degrees with the axis of the first spray ring 11 and the axis of the second spray ring 12.

In the embodiments, the diameters of the first spraying ring 11 and the second spraying ring 12 are different greatly, the diameter of the first spraying ring 11 is relatively small, and the nozzles on the first spraying ring 11 do not need to be arranged obliquely, so that the sprayed water mist can be located in the outlet range of the spraying machine, and the processing difficulty can be reduced on the basis of realizing a long-distance spraying process.

Therefore, the installation angles of the nozzles on the inner ring and the outer ring are set differently according to the different diameter ratios of the inner ring and the outer ring, so that the spraying dust suppression effect is further improved, and the spraying dust suppression efficiency is improved.

The above description is only exemplary of the present invention and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A medium atomizing nozzle (2), characterized by comprising:

a nozzle body (21);

a gas flow passage (22) provided inside the nozzle body (21);

a liquid flow passage (23) provided inside the nozzle body (21);

a mixing chamber (24) disposed inside the nozzle body (21), communicating with both the gas flow passage (22) and the liquid flow passage (23), and receiving the liquid flowing out of the liquid flow passage (23) and the gas flowing out of the gas flow passage (22); and

and the ventilation flow channel (25) is communicated with the gas flow channel (22) and the liquid flow channel (23) and guides part of gas in the gas flow channel (22) to flow into the liquid flow channel (23) before flowing into the mixing cavity (24).

2. Medium atomizing nozzle (2) according to claim 1, characterized in that the gas channel (22) comprises a gas inlet (221), the gas inlet (221) being arranged at a side face of the nozzle body (21), the liquid channel (23) comprising a liquid inlet (231), the liquid inlet (231) being arranged at an axial end face of the nozzle body (21).

3. A medium atomizing nozzle (2) according to claim 2, characterized in that the diameter of said gas inlet (221) is 1/4-1/2 of the diameter of said liquid inlet (231).

4. A medium atomizing nozzle (2) according to claim 2, characterized in that said gas flow passage (22) further includes a first flow passage (222), said first flow passage (222) communicating said gas inlet (221) and said mixing chamber (24), said liquid flow passage (23) further includes a second flow passage (232), said second flow passage (232) communicating said liquid inlet (231) and said mixing chamber (24), and said second flow passage (232) is located outside said first flow passage (222) in a radial direction of said nozzle body (21).

5. A medium atomizing nozzle (2) according to claim 4, characterized in that said ventilation flow channel (25) communicates said air inlet (221) and said second flow channel (232).

6. A medium atomizing nozzle (2) according to claim 4, characterized in that said gas flow channel (22) further comprises a tapered bore (223), said tapered bore (223) communicating said first flow channel (222) and said mixing chamber (24), and a cross section of said tapered bore (223) being tapered along a gas flow direction; and/or the liquid flow passage (23) further comprises a swirl hole (233), the swirl hole (233) communicates the second flow passage (232) and the mixing chamber (24), and an outlet of the swirl hole (233) is inclined toward an outlet side of the mixing chamber (24) with respect to an inlet of the swirl hole (233).

7. A medium atomizing nozzle (2) according to claim 6, characterized in that said vent flow channel (25) communicates said tapered bore (223) and said second flow channel (232).

8. A medium atomizing nozzle (2) according to claim 6, characterized in that said tapering bore (223) has a taper of 20-40 °; and/or the included angle between the axis of the swirl hole (233) and the axis of the nozzle body (21) is 30-60 degrees; and/or the diameter of the swirl hole (233) is 1/4-2/3 of the diameter of the liquid inlet (231).

9. A medium atomizing nozzle (2) according to claim 4, characterized in that the smallest diameter of said second flow channel (232) is 1/10-1/4 of the diameter of said liquid inlet (231).

10. A medium atomizing nozzle (2) according to claim 4, characterized in that said second flow channel (232) comprises a liquid passage chamber (232c), said liquid passage chamber (232c) being located most downstream of said second flow channel (232) in the liquid flow direction.

11. A medium atomizing nozzle (2) according to claim 10, characterized in that said vent channel (25) communicates said gas channel (22) and said liquid communication chamber (232 c).

12. A medium atomizing nozzle (2) according to one of claims 3 to 11, characterized in that said vent channel (25) has a diameter 1/3 to 1/5 of the diameter of said first channel (222).

13. An atomizing device comprising a support device (1), characterized in that it further comprises a medium atomizing nozzle (2) according to any one of claims 1 to 12, said medium atomizing nozzle (2) being arranged on said support device (1).

14. Atomisation device according to claim 13, characterised in that the support means (1) comprise a first spray ring (11) and a second spray ring (12) arranged concentrically and in sequence from the inside to the outside, the medium atomisation nozzle (2) being arranged on at least one of the first spray ring (11) and the second spray ring (12).

15. Atomizing device according to claim 14, characterized in that it further comprises a pressure atomizing nozzle (3), which pressure atomizing nozzle (3) is provided on at least one of the first spray ring (11) and the second spray ring (12).

16. Atomizing device according to claim 15, characterized in that the pressure atomizing nozzle (3) and the medium atomizing nozzle (2) are arranged on one and the other of the first spray ring (11) and the second spray ring (12), respectively.

17. Atomizing device according to claim 15, characterized in that the diameter ratio of the first spray ring (11) to the second spray ring (12) is greater than or equal to 0.7 and less than 1, the pressure atomizing nozzle (3) and the medium atomizing nozzle (2) are inclined towards the center of the first spray ring (11) and the second spray ring (12), and the axes of the pressure atomizing nozzle (3) and the medium atomizing nozzle (2) are at an angle of 15-25 ° to the axes of the first spray ring (11) and the second spray ring (12); or the diameter ratio of the first spray ring (11) to the second spray ring (12) is less than 0.7, in all the nozzles, the axis of the nozzle arranged on the first spray ring (11) is parallel to the axis of the first spray ring (11) and the second spray ring (12), the nozzle arranged on the second spray ring (12) inclines towards the center of the first spray ring (11) and the second spray ring (12), and the axis of the nozzle arranged on the second spray ring (12) and the axis of the first spray ring (11) and the second spray ring (12) form an included angle of 15-25 degrees.

18. Atomizing device according to claim 17, characterized in that the diameter ratio of the first spray ring (11) to the second spray ring (12) is greater than or equal to 0.7 and less than or equal to 0.9 and that the axes of the pressure atomizing nozzle (3) and of the medium atomizing nozzle (2) and the axes of the first spray ring (11) and of the second spray ring (12) form an angle of 15-25 °.

19. Atomizing device according to claim 14, characterized in that the atomizing device comprises a plurality of said medium atomizing nozzles (2), said plurality of medium atomizing nozzles (2) being arranged on the same spray ring at a distance from each other, two adjacent medium atomizing nozzles (2) being in communication by means of a connecting gas pipe (6), and one of the medium atomizing nozzles (2) being in communication with a gas source by means of a gas inlet pipe (5).

20. A spraying machine comprising a spraying apparatus as claimed in any one of claims 13 to 19.