CN110918284B - Medium atomizing nozzle, atomizer and sprayer - Google Patents

Abstract

The invention relates to the technical field of atomization, in particular to a medium atomizing nozzle, a spraying device and a sprayer. The medium atomizing nozzle provided by the invention comprises: the air conditioner 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 the air flow channel; 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 the invention, the ventilation flow channel can be used for introducing gas into the liquid in advance before the liquid enters the mixing cavity, so that the number of gas-liquid mixing times is increased, and the atomization effect is improved.

Description

Medium atomizing nozzle, atomizer and sprayer

Technical Field

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

Background

The atomizing nozzle is an important component of equipment such as a combustor or a sprayer and is used for atomizing liquid and dispersing the liquid into liquid drops with small particle sizes.

According to the atomization mode, the atomization nozzles are classified into pressure atomization nozzles and medium atomization nozzles. The pressure atomizing nozzle is also called as a mechanical atomizing nozzle, and is mainly realized by means of high-speed jet generated by liquid under the action of pressure difference; the medium atomizing nozzle mainly uses high-speed jet medium (such as air or steam) to impact liquid to realize 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, a spraying device and a sprayer with better atomizing effect.

The medium atomizing nozzle provided by the invention comprises:

a nozzle body;

the gas flow passage is arranged in the nozzle body;

the liquid runner is arranged in 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 liquid flowing out of the liquid flow channel and gas flowing out of the gas flow channel; and

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

In some embodiments, the gas flow channel comprises a gas inlet disposed on a side of the nozzle body, and the liquid flow channel comprises a liquid inlet disposed on an axial end face of the nozzle body.

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

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

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

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

In some embodiments, the vent flow passage communicates the tapered bore with 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 smallest diameter of the second flow passage is 1/10-1/4 of the inlet diameter.

In some embodiments, the second flow passage includes a liquid passing chamber located furthest downstream of the second flow passage along the liquid flow direction.

In some embodiments, the vent flow channel communicates the gas flow channel with the vent lumen.

In some embodiments, the diameter of the vent channel is 1/3-1/5 of the diameter of the first channel.

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

In some embodiments, the support device includes a first spray ring and a second spray ring concentrically disposed and sequentially disposed from the inside to the outside, and the medium atomizing nozzle is disposed 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 medium 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 an included angle of 15-25 degrees is formed between 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; or the diameter ratio of the first spray ring to the second spray ring is smaller than 0.7, in all the nozzles, the axes of the nozzles arranged on the first spray ring are parallel to the axes of the first spray ring and the second spray ring, the nozzles arranged on the second spray ring incline to the centers of the first spray ring and the second spray ring, and an included angle of 15-25 degrees is formed between the axes of the nozzles arranged on the second spray ring and the axes 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 atomizing nozzle and the medium atomizing nozzle form an included angle of 15-25 degrees with 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 atomization device.

In the invention, the ventilation flow channel can be used for introducing gas into the liquid in advance before the liquid enters the mixing cavity, so that the number of gas-liquid mixing times is increased, and the atomization effect is improved.

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

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 shows a top view of a spray device provided by the present invention.

Fig. 2 shows an enlarged partial schematic view of 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-liquid flow tube of fig. 4.

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

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

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

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

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 medium atomizing nozzle; 21. a nozzle body; 211. a mounting base; 212. a gas-liquid flow tube; 213. a mixing head; 214. a mix head housing; 22. a gas flow passage; 221. an air inlet; 222. a first flow passage; 223. taper holes; 23. a liquid flow channel; 231. a liquid inlet; 232. a second flow passage; 232a, a first liquid through hole; 232b, second liquid through holes; 232c, a liquid passing cavity; 233. swirl holes; 24. a mixing chamber; 25. a ventilation flow passage; 26. a seal;

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. and a three-way joint.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.

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

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms are not meant to have any special meaning unless otherwise indicated, so that the scope of the present invention is not to be construed as being limited.

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

Fig. 1 to 10 exemplarily show the structures of the medium atomizing nozzle and the atomizing device of the present invention.

Referring to fig. 3 to 10, the medium atomizing nozzle 2 provided by the present invention includes:

a nozzle body 21;

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

a liquid flow path 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 for receiving the liquid flowing out of the liquid flow passage 23 and the gas flowing out of the gas flow passage 22; and

the ventilation flow passage 25 communicates the gas flow passage 22 and the liquid flow passage 23, and guides a part of the gas in the gas flow passage 22 to flow into the liquid flow passage 23 before flowing into the mixing chamber 24.

Based on the above arrangement, under the guiding action of the ventilation flow channel 25, part of the gas can be mixed with the liquid in the liquid flow channel 23 in advance before the liquid enters the mixing cavity 24, the liquid is stirred to generate primary atomization, and the liquid after primary atomization can flow into the mixing cavity 24 to be mixed with the gas entering the mixing cavity 24 again to generate secondary atomization.

Therefore, the invention can increase the atomization times before the liquid is sprayed by adding the ventilation flow passage 25 on the basis of the mixing cavity 24, thereby effectively improving the atomization effect.

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 that communicates the gas inlet 221 with the mixing chamber 24; the liquid flow path 23 includes a liquid inlet 231, and further includes a second flow path 232 communicating the liquid inlet 231 with the mixing chamber 24.

There are various arrangements of the gas flow path 22 and the liquid flow path 23.

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

For another example, referring to fig. 4 and 9, in other embodiments, the air inlet 221 is disposed at a side surface of the nozzle body 21, and the liquid inlet 231 is disposed at an axial end surface of the nozzle body 21. At this time, the medium atomizing nozzle 2 adopts a fluid inlet method in which liquid is axially introduced and air is radially introduced. Compared with the fluid inlet mode of axial air inlet and radial air inlet, the fluid inlet mode of axial air inlet and radial air inlet is adopted, so that the risk of blockage of the liquid flow channel 23 is reduced.

In the case of axial liquid feed and radial air feed, referring to fig. 3 and 4, in some embodiments, the second flow channel 232 is located outside the first flow channel 222 along the radial direction of the nozzle body 21. In this case, not only processing is convenient, but also a plurality of liquid passing hole structures are arranged in the second flow channel 232 along the circumferential direction, and as the liquid passing hole structures can be mutually standby, when the liquid passing hole structures are more, even if part of the liquid passing hole structures are blocked, liquid can still flow into the mixing cavity 24 through the rest of the liquid passing hole structures, therefore, the blocking of the liquid flow channel 23 is prevented more favorably, and the problem of atomization failure caused by the blocking of the liquid flow channel 23 is avoided more favorably.

And, referring to fig. 4-9, in some embodiments, the gas flow passage 22 further includes a tapered bore 223, the tapered bore 223 communicates the first flow passage 222 and the mixing chamber 24, and the cross section of the tapered bore 223 tapers along the gas flow direction. By arranging the tapered hole 223 tapered along the air flow direction between the first flow passage 222 and the mixing cavity 24, a gentle transition from the first flow passage 222 to the mixing cavity 24 can be realized, which is beneficial to reducing the air pressure loss, so that the air flow can blow off the liquid in the mixing cavity 24 more fully, and a better atomization effect can be realized.

In addition, referring to fig. 4 and 9, in some embodiments, the liquid flow channel 23 further includes a swirl hole 233, the swirl hole 233 communicates the second flow channel 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 of the second flow passage 232 flows into the mixing chamber 24 via the swirl holes 233, and since the swirl holes 233 are provided so that the liquid forms a swirl flow when entering into the mixing chamber 24 and has a component speed in accordance with the direction of the air flow speed entering into the mixing chamber 24 from the first flow passage 222, sufficient mixing of the gas and liquid is facilitated, thereby further improving the atomizing effect.

Based on the structures and arrangements of the gas flow channels 22 and the liquid flow channels 23 in the above embodiments, the arrangement of the ventilation flow channels 25 may be varied to achieve premixing of the gas and liquid.

Referring to fig. 4, in some implementations, the ventilation channel 25 communicates the gas channel 22 and the liquid channel 23 by communicating the gas inlet 221 with the second channel 232, so as to achieve premixing of the gas and the liquid in the liquid channel 23, and improve the atomization effect.

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

In addition, in order to further improve the atomization effect, the shape and position parameters of each component of the gas flow path 22 and the liquid flow path 23 may be set.

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

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

The shape and position parameters of the gas flow channel 22 and the liquid flow channel 23 are set in at least one mode, so that smooth flow of the gas and the liquid respectively can be realized, 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 embodiment 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 26, and a fluid flow channel 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, the mounting base 211, the gas-liquid flow pipe 212, the mixing head 213 and the mixing head housing 214 are all in a revolving structure, and the mounting base 211, the gas-liquid flow pipe 212 and the mixing head housing 214 are coaxially and sequentially connected, and the mixing head 213 and the mixing head housing 214 are coaxially disposed in the mixing head housing 214 and are limited by the mixing head housing 214 and the gas-liquid flow pipe 212.

Specifically, the first axial end of the gas-liquid flow tube 212 is inserted into the mounting seat 211 coaxially with the mounting seat 211 and is screwed with the mounting seat 211, while the second axial end of the gas-liquid flow tube 212 is inserted into the mixing head housing 214 coaxially with the mixing head housing 214 and is screwed with the mixing head housing 214, and the space between the gas-liquid flow tube 212 and the mounting seat 211 and the mixing head housing 214 is sealed by a sealing member 26 (such as a sealing ring); the mixing head 213 is disposed in the mixing head housing 214 and is located at a side of the gas-liquid flow tube 212 away from the mounting seat 211, the axial first end of the mixing head 213 abuts against the axial second end of the gas-liquid flow tube 212, the axial second end of the mixing head 213 has a neck portion, the neck portion is inserted into a central hole of one end of the mixing head housing 214 away from the mounting seat 211, and the shaft shoulder abuts against an inner wall of an inner cavity of the mixing head housing 214 away from the gas-liquid flow tube 212, thereby limiting axial and radial displacement of the mixing head 213.

Based on the above arrangement, the nozzle body 21 as a whole has a gyroid shape with its central axis collinear with the central axes of the mount 211, the gas-liquid flow pipe 212, the mixing head 213 and the mixing head housing 214, that is, with its axial and radial directions coincident with the axial and radial directions of the mount 211, the gas-liquid flow pipe 212, the mixing head 213 and the mixing head housing 214. The mounting seat 211, the gas-liquid flow pipe 212 and the mixing head cover 214 are screwed in sequence and sealed by the sealing member 26, and the gas-liquid flow pipe 212, the mixing head 213 and the mixing head cover 214 are tightly sealed by end face fit. Thus, the nozzle body 21 has a simple and compact structure, is convenient to assemble and disassemble, is convenient to maintain, has good tightness, and is convenient for the arrangement of the fluid flow channels.

Next, the structure and arrangement of the fluid flow channels will be described.

As shown in fig. 4-8, in this embodiment, a gas flow path 22 is provided on the gas-liquid flow tube 212 and the mixing head 213 for directing the gas flow to the mixing chamber 24 for mixing with the liquid entering the mixing chamber 24 via the liquid flow path 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 taper hole 223, which are sequentially communicated in the gas flow direction.

Wherein, the gas inlet 221 is disposed at the side of the gas-liquid runner 212 and is communicated with the external environment, and the gas supply flow flows into the gas runner 22. Air inlet 221 is vertically disposed with its axis along the radial direction of gas-liquid flow conduit 212. And the diameter of the air inlet 221 is 1/4-1/2 of the diameter of the liquid inlet 231.

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

The cone aperture 223 communicates with the first flow channel 222 and the mixing chamber 24, which is disposed on the mixing head 213 and is laterally disposed with the axis collinear with the axis of the mixing head 213 such that the cone aperture 223 communicates coaxially with the first flow channel 222. The inlet and outlet of the tapered bore 223 are in communication with the first flow passage 222 and the mixing chamber 24, respectively, and the cross section of the tapered bore 223 tapers in a direction from the inlet to the outlet of the tapered bore 223. Specifically, the taper α of the tapered bore 223 is 20-40 °.

Based on the above arrangement, the inlet of the gas inlet 221 and the outlet of the taper hole 223 form the inlet and the outlet of the gas flow passage 22, respectively.

The liquid flow channel 23 is used for guiding the liquid to flow to the mixing chamber 24 so as to be mixed with the gas entering the mixing chamber 24 through the gas flow channel 22, and atomization is realized. As shown in fig. 4 to 8, in this embodiment, the liquid flow path 23 includes a liquid inlet 231, a second flow path 232, and a swirl hole 223 which are sequentially communicated 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 far away from the mixing head housing 214 to an axial first end of the gas-liquid runner 212, and is coaxially disposed with the mounting seat 211.

The second flow passage 232 communicates with the liquid inlet 231 and the swirl holes 233, which are arranged radially outside the first flow passage 222, and includes a liquid passing hole structure and a liquid passing chamber 232c that communicate in sequence along the liquid flow direction. The liquid through hole structure is disposed on the gas-liquid flow pipe 212, and includes a first liquid through hole 232a and a second liquid through hole 232b that are sequentially connected along the liquid flow direction. The first liquid passage hole 232a and the second liquid passage hole 232b are coaxially arranged and are both located radially outside the first flow passage 222. As shown in fig. 3 and 5, a plurality of (specifically, 4) liquid through holes are uniformly distributed in the circumferential direction on the gas-liquid flow pipe 212. The liquid passing chamber 232c is located between the gas-liquid flow tube 212, the mixing head 213 and the mixing head housing 214, and communicates the liquid passing hole structure with the swirl holes 233, and is the most downstream portion of the second flow passage 232 in the liquid flow direction. Among the first liquid passing hole 232a, the second liquid passing hole 232b and the liquid passing chamber 232c, the second liquid passing hole 232b has the smallest radial dimension, and the diameter thereof 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.

Swirl holes 233 are provided obliquely to the mixing head 213 and communicate with the liquid chamber 232c and the mixing chamber 24. Specifically, the inlet and outlet of the swirl hole 233 communicate with the liquid passing chamber 232c and the mixing chamber 24, respectively, and the axis of the swirl hole 233 is inclined toward the outlet side of the mixing chamber 24 in the direction from the inlet to the outlet of the swirl hole 233. More specifically, the angle β between the axis of swirl holes 233 and the axis of mixing chamber 24 is 30-60 °. And the diameter of the swirl holes 233 is 1/4-2/3 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 in the mixing head 213 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 holes 233 form the inlet and the outlet of the liquid flow passage 23, respectively. The liquid inlet direction of the liquid flow channel 22 and the liquid inlet direction of the gas flow channel 23 are perpendicular, and 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 inlet mode of axial liquid inlet and radial air inlet.

The mixing chamber 24 is communicated with both the outlet of the liquid flow passage 22 and the outlet of the liquid flow passage 23, and is communicated with the external environment, for receiving the gas flowing out of the gas flow passage 22 and the liquid flowing out of the liquid flow passage 23, mixing the gas and the liquid therein, and ejecting 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 such that the mixing chamber 24 becomes the 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. In this way, the mixing chamber 24 forms a spray hole, the liquid in the liquid flow channel 23 and the gas in the gas flow channel 22 can both flow into the mixing chamber 24, and the liquid and the gas entering the mixing chamber 24 can be instantaneously mixed and sprayed out to form water mist. The outlet of the mixing chamber 24 is an end face opening of the axial second end of the mixing chamber 24.

The ventilation flow path 25 communicates the gas flow path 22 and the liquid flow path 23 so that the liquid in the liquid flow path 23 can be premixed with a portion of the gas in the gas flow path 22 before flowing into the mixing chamber 24 to improve the atomization effect. Specifically, as shown in fig. 4 and 6, in this embodiment, a ventilation flow path 25 is provided on the gas-liquid flow pipe 212, and its inlet and outlet communicate with the gas inlet 221 and the ventilation chamber 232c, respectively. As can be seen from fig. 4, the axis of the vent flow passage 25 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. At this time, the ventilation flow passages 25 are alternately arranged in the circumferential direction with the liquid passage hole structure, for example.

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

The gas and the liquid are mixed twice successively, so that the mixing times are increased, and a two-stage atomization process is formed, and therefore, the atomization effect is better, and the particle size of the fog drops is smaller.

In this embodiment, the diameter of the vent flow passage 25 is 1/3-5/1 of the diameter of the first flow passage 222. In this way, on the one hand, the ratio of the gas flow rates flowing through the first flow passage 222 and the ventilation flow passage 25 is more reasonable, and a better atomization effect can be achieved, and on the other hand, a plurality of ventilation flow passages 25 are also convenient to arrange, so that the atomization effect is further improved.

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 ventilation flow path 25 is not connected to the liquid flow path 22 by connecting the air inlet 221 with the liquid flow path 232c, but is connected to the gas flow path 23 and the liquid flow path 22 by connecting the tapered hole 223 with the liquid flow path 232c.

Specifically, as can be seen from fig. 9 and 10, in this embodiment, the aeration flow path 25 is provided on the mixing head 213, and the inlet and outlet communicate with the taper hole 223 and the aeration chamber 232c, respectively. And, the axis of the vent flow passage 25 is perpendicular to the axis of the nozzle body 21, i.e., the axis of the vent flow passage 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 taper hole 223 through the first flow channel 222, one part of the gas enters the liquid passing cavity 232c through the ventilation 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 taper hole 223 to be mixed with the liquid entering the mixing cavity 24 again, so that the liquid is atomized twice.

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

In addition, in the foregoing two embodiments, the axis of the vent flow passage 25 is parallel or perpendicular to the axis of the nozzle body 21, but in other embodiments, the axis of the vent 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 vent flow passage 25 may be parallel or intersect with the axis of the nozzle body 21.

In summary, the ventilation flow channel 25 is additionally arranged in the medium atomizing nozzle 2 to realize the premixing of gas and liquid, thereby being beneficial to refining and uniform droplet size and improving the atomizing effect.

The medium atomizing nozzle 2 of the present invention can be applied to various atomizing devices. For example, the present invention can be applied to a burner, in which case the liquid introduced into the medium atomizing nozzle 2 is fuel oil. For another example, the present invention can be applied to a spray ring of a sprayer, and in this case, the liquid introduced into the medium atomizing nozzle 2 is water.

The use of the medium atomizing nozzle 2 of the present invention in a spraying device will be described with reference to fig. 1-2.

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

In some embodiments, the spraying device is a spraying ring of a spraying machine, the supporting device 1 of which comprises a first spraying ring 11 and a second spraying ring 12 which are concentrically arranged and are sequentially 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 adopted in the sprayer, namely, the first spray ring 11 and the second spray ring 12 are provided with the pressure atomizing nozzles.

Compared with the pressure atomizing nozzle, the medium atomizing nozzle has smaller atomizing particle size and smaller water consumption, so that the invention is beneficial to improving the atomizing effect and prolonging the operation time of the sprayer, and the medium atomizing nozzle atomizes through gas, has lower blocking risk and is beneficial to improving the working reliability of the sprayer.

In particular, the medium atomizing nozzle 2 of the present invention can increase the number of atomization of the liquid and improve the atomization effect based on the combined action of the ventilation flow channel 25 and the mixing chamber 24, and therefore, the dust suppression effect can be remarkably improved by applying the medium atomizing nozzle 2 of the present invention to a sprayer.

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

The atomizing device disclosed by the invention is a composite atomizing device because the atomizing device comprises the medium atomizing nozzle 2 and the pressure atomizing nozzle 3, integrates the advantages of the medium atomizing nozzle 2 and the pressure atomizing nozzle 3, can realize the atomizing process with less water consumption, difficult blockage and good atomizing effect on the basis of excessively increasing the cost, improves the dust suppression effect and improves the dust suppression efficiency.

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

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

In other embodiments, the medium atomizing nozzles 2 are provided on only one of the first spray ring 11 and the second spray ring 12, and the pressure atomizing nozzles 3 are provided on both the first spray ring 11 and the second spray ring 12. For example, the medium atomizing nozzles 2 are provided only on the first spray ring 11, and the pressure atomizing nozzles 3 are provided on both the first spray ring 11 and the second spray ring 12. At this time, the first spray ring 11 is provided with both the medium atomizing nozzle 2 and the pressure atomizing nozzle 3, and the second spray ring 12 is provided with only the pressure atomizing nozzle 3. For another example, the medium atomizing nozzles 2 are provided only on the second spray ring 12, and the pressure atomizing nozzles 3 are provided on both the first spray ring 11 and the second spray ring 12. At this time, only the pressure atomizing nozzle 3 is provided on the first spray ring 11, and the medium atomizing nozzle 2 and the pressure atomizing nozzle 3 are simultaneously provided on the second spray ring 12.

In still other embodiments, the pressure atomizing nozzles 3 are provided on only one of the first spray ring 11 and the second spray ring 12, and the medium atomizing nozzles 2 are provided on both the first spray ring 11 and the second spray ring 12. For example, the pressure atomizing nozzles 3 are provided only on the first spray ring 11, and the medium atomizing nozzles 2 are provided on both the first spray ring 11 and the second spray ring 12. At this time, the first spray ring 11 is provided with both the medium atomizing nozzle 2 and the pressure atomizing nozzle 3, and the second spray ring 12 is provided with only the medium atomizing nozzle 2. For another example, the pressure atomizing nozzles 3 are provided only on the second spray ring 11, and the medium atomizing nozzles 2 are provided on both the first spray ring 11 and the second spray ring 12. At this time, only the medium atomizing nozzles 2 are provided on the first spray ring 11, and both the medium atomizing nozzles 2 and the pressure atomizing nozzles 3 are provided on the second spray ring 12.

Referring to fig. 1-2, in still other embodiments, the pressure atomizing nozzle 3 and the medium atomizing nozzle 2 are provided 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 respectively provided on the inner ring and the outer ring of the atomizer. Because the nozzles of the same type are arranged on the same spray ring, and the nozzles of the same type have similar pipeline connection requirements, the arrangement mode is convenient for pipeline arrangement, is beneficial to simplifying the structure and saving the cost.

For example, when a plurality of medium atomizing nozzles 2 are all provided on the same spray ring, referring to fig. 2, two adjacent medium atomizing nozzles 2 may communicate through a connecting air pipe 6, and one of the medium atomizing nozzles 2 communicates with an air source through an air inlet pipe 5. At this time, all the 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 remarkably reduced, and the structure of the spraying device can be effectively simplified.

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

Specifically, in the embodiment shown in fig. 1-2, the liquid inlet pipe 4 is welded below the second spray ring 12 of the first spray ring 11, 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, and all the medium atomizing nozzles 2 and all the pressure atomizing nozzles 3 are communicated with the liquid inlet pipe 4, at the same time, two adjacent medium atomizing nozzles 2 are in gas communication through the connecting gas pipe 6, and one medium atomizing nozzle 2 positioned 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; the medium atomizing nozzle 2 above the liquid inlet pipe 4 has its air inlet 221 communicated with the connecting air pipe 6 and the air inlet pipe 5 via the four-way joint 7, while the air inlets 221 of the rest medium atomizing nozzles 2 are all communicated with the connecting air pipe 6 via the three-way joint 8.

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

In addition, the medium atomizing nozzle 2 adopts a fluid inlet mode of axially feeding water and radially feeding air, which is beneficial to further simplifying the structure and facilitating processing. Because, when the medium atomizing nozzle 2 adopts the fluid inlet mode of axially feeding water and radially feeding air, 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 air communication between the adjacent medium atomizing nozzles 2 is more conveniently realized by using the connecting air pipe 6, and the liquid inlet pipe 4 and the air inlet pipe 5 are also more conveniently arranged in the mode of illustration.

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 nozzle 3 and the medium atomizing nozzle 2 are inclined toward the centers of the first spray ring 11 and the second spray ring 12, and an included angle of 15-25 ° is formed between the axes of the pressure atomizing nozzle 3 and the medium atomizing nozzle 2 and 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 nozzle 3 and the medium atomizing nozzle 2 form an angle of 15-25 ° 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 greatly different, and the medium atomizing nozzle 2 and the pressure atomizing nozzle 3 are installed according to the installation angle, so that the sprayed water mist is more beneficial to be in the range of the outlet of the sprayer, the outward divergence of the water mist is reduced, and the water mist is conveniently conveyed to a longer distance, and a longer-distance spraying process is realized.

In other embodiments, the diameter ratio of the first spray ring 11 to the second spray ring 12 is less than 0.7, and in all the nozzles, the axes of the nozzles disposed on the first spray ring 11 are parallel to the axes of the first spray ring 11 and the second spray ring 12, the nozzles disposed on the second spray ring 12 are inclined toward the centers of the first spray ring 11 and the second spray ring 12, and an included angle of 15-25 ° is formed between the axes of the nozzles disposed on the second spray ring 12 and 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 different greatly, the diameter of the first spray ring 11 is relatively smaller, and the nozzles on the first spray ring 11 are not required to be obliquely arranged, so that the sprayed water mist is located in the outlet range of the sprayer, and the processing difficulty can be reduced on the basis of realizing the long-distance spraying process.

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

The above description is illustrative of the present invention and is not intended to be limiting, but is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and principles of the invention.

Claims (20)

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 path (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 for 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 ventilation flow passage (25) which is arranged inside the nozzle body (21), communicates the gas flow passage (22) with the liquid flow passage (23), and guides part of the gas in the gas flow passage (22) to flow into the liquid flow passage (23) before flowing into the mixing cavity (24).

2. The medium atomizing nozzle (2) according to claim 1, wherein the gas flow channel (22) includes a gas inlet (221), the gas inlet (221) is provided at a side surface of the nozzle body (21), the liquid flow channel (23) includes a liquid inlet (231), and the liquid inlet (231) is provided at an axial end surface of the nozzle body (21).

3. The media atomizing nozzle (2) of claim 2, wherein the diameter of the air inlet (221) is 1/4-1/2 of the diameter of the liquid inlet (231).

4. The media atomizing nozzle (2) according to claim 2, wherein the gas flow channel (22) further comprises a first flow channel (222), the first flow channel (222) communicates with the gas inlet (221) and the mixing chamber (24), the liquid flow channel (23) further comprises a second flow channel (232), the second flow channel (232) communicates with the liquid inlet (231) and the mixing chamber (24), and the second flow channel (232) is located outside the first flow channel (222) along a radial direction of the nozzle body (21).

5. The media atomizing nozzle (2) of claim 4, wherein said vent flow channel (25) communicates with said air inlet (221) and said second flow channel (232).

6. The media atomizing nozzle (2) of claim 4, wherein 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) tapers along a gas flow direction; and/or, the liquid flow channel (23) further comprises a swirl hole (233), the swirl hole (233) is communicated with the second flow channel (232) and the mixing cavity (24), and an outlet of the swirl hole (233) is inclined towards one side of an outlet of the mixing cavity (24) relative to an inlet of the swirl hole (233).

7. The media atomizing nozzle (2) of claim 6, wherein said vent flow channel (25) communicates with said cone orifice (223) and said second flow channel (232).

8. The media atomizing nozzle (2) of claim 6, wherein the taper of the cone orifice (223) is 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 holes (233) is 1/4-2/3 of the diameter of the liquid inlet (231).

9. The media atomizing nozzle (2) of claim 4, wherein a smallest diameter of the second flow channel (232) is 1/10-1/4 of a diameter of the liquid inlet (231).

10. The media atomizing nozzle (2) of claim 4, wherein the second flow channel (232) includes a liquid passage chamber (232 c), the liquid passage chamber (232 c) being located downstream-most of the second flow channel (232) in a liquid flow direction.

11. The media atomizing nozzle (2) according to claim 10, wherein the ventilation flow channel (25) communicates the gas flow channel (22) with the liquid passage chamber (232 c).

12. The medium atomizing nozzle (2) according to any one of claims 4 to 11, characterized in that the diameter of said ventilation flow channel (25) is 1/3 to 1/5 of the diameter of said first flow 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 1-12, said medium atomizing nozzle (2) being arranged on said support device (1).

14. The atomizing device according to claim 13, characterized in that the support device (1) comprises a first spray ring (11) and a second spray ring (12) which are concentrically arranged and are arranged in sequence from the inside to the outside, the medium atomizing nozzle (2) being arranged on at least one of the first spray ring (11) and the second spray ring (12).

15. The atomizing device according to claim 14, further comprising a pressure atomizing nozzle (3), the pressure atomizing nozzle (3) being provided on at least one of the first spray ring (11) and the second spray ring (12).

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

17. The 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 toward the centers 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 ° with respect 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 smaller than 0.7, in all the nozzles, the axes of the nozzles arranged on the first spray ring (11) are parallel to the axes of the first spray ring (11) and the second spray ring (12), the nozzles arranged on the second spray ring (12) incline to the centers of the first spray ring (11) and the second spray ring (12), and an included angle of 15-25 degrees is formed between the axes of the nozzles arranged on the second spray ring (12) and the axes of the first spray ring (11) and the second spray ring (12).

18. An atomising device according to claim 17, characterised 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 atomising nozzle (3) and the medium atomising nozzle (2) are at an angle of 15-25 ° to the axes of the first spray ring (11) and the second spray ring (12).

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

20. A spray machine comprising an atomising device as claimed in any one of claims 13 to 19.