JP2007090253A - Swirl type atomizing nozzle capable of variously mixing and atomizing powder and liquid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique for a swirl type atomizing nozzle capable of variously spraying by atomizing a mixed liquid while continuously mixing one or more kinds of powders into one or more kinds of liquids. <P>SOLUTION: In the swirl type atomizing nozzle mixing and spraying, at a focus point focusing in the front side, the liquid ejected out to the front of the nozzle through a liquid ejecting opening 22 and a swirl gas with a high revolving speed ejected in a tapered-off cone shape toward the front of the nozzle through a gas ejecting opening 23 by successively making the swirl gas pass through a spiral groove 25 to a swirl chamber W, a powder supplying opening 34 introducing the powders is installed on the upstream of a liquid supply opening 28 communicating in a liquid passage pipe 36. Alternatively, a plurality of fluid (liquid or powder) passage pipes (cf. symbols 53, 54 in Fig. 7) communicating in the liquid passage pipe 36 are installed allowing three or more fluids to be mixed and atomized by supplying the powders from the upstream of the liquid supply opening. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vortex atomization nozzle that performs various atomization sprays by selecting and mixing various liquids or powders to be sprayed.

  As a conventional atomizing nozzle, there is a two-fluid nozzle that mixes and atomizes two kinds of liquids as shown in Patent Document 1 (see FIG. 8).

  That is, in the two-fluid nozzle, the two types of liquid introduced from the two liquid insertion ports 10 opened so as to face each other on the side surface of the nozzle body 4 are compressed gas insertion ports via the primary gas passage 9. 8 becomes a primary mixed fluid mixed and primarily crushed in the internal mixing chamber 11 by the primary gas fed from 8 (see FIG. 8A). The primary mixed fluid passes through the compressed gas introduction pressure and the negative pressure caused by the secondary gas (the compressed gas insertion port 8, the secondary gas passage 12, the swirl guide hole 14, and the vortex chamber 15 to vortex the gas. The suction gas is sucked and ejected to the liquid ejection port by the negative pressure caused by the secondary gas ejected into the tapered cone from the mouth 16 as a high-speed swirling vortex gas, and externally mixed with the secondary gas in front of the nozzle Secondary crushing, that is, atomization, was sprayed forward (see FIG. 8B).

Japanese Patent Publication No.62-201665

  Conventionally, the atomization spraying operation using the atomization nozzle includes an operation of mixing a particulate matter or the like that is a powder into a liquid and applying it to the object by spraying or coating the object. Therefore, in the above-described two-fluid nozzle, it has been considered to insert powder instead of liquid from one of the two liquid insertion ports and use it for mixed spraying of liquid and powder. However, since the conventional two-fluid nozzle (see FIG. 8) is supposed to be a mixed spray of liquids, when the atomization spray is performed while mixing the powder into the liquid, the following is performed: There was a problem.

  That is, when the conventional two-fluid nozzle is used as shown in FIG. 8, the liquid and the powder are each introduced by the pressure introduced from the compressed gas insertion port 8 and the negative pressure caused by the secondary gas, or in addition to the negative pressure. Although it is fed into the internal mixing chamber 11 by the introduction pressure applied to the liquid insertion port 10 (in this case, one is the powder insertion port), in any case, the liquid and the powder enter the internal mixing chamber 11. The jetting pressure at the time of jetting was easier for the liquid.

  Accordingly, the liquid enters the powder supply port on the opposite side due to the strength of the jetting force, so that the powder cannot be ejected into the internal mixing chamber 11 or the liquid is supplied to the powder supply port 10. As a result, the powder adhered to the inner wall of the powder supply port and solidified, causing clogging, and there was a first problem that the mixed powder was not introduced into the internal mixing chamber 11.

  Furthermore, since the conventional two-fluid nozzle has only two liquid insertion ports, there is a second problem that cannot be used for spraying while mixing three or more kinds of fluids.

  Therefore, when mixing a specific powder into a liquid or mixing and spraying three or more types of powder and liquid, it is necessary to prepare a mixed solution in advance before spraying, and each fluid is mixed. However, there was a problem that it was difficult to perform the spraying operation.

  In view of the problems described above, in the present invention, various kinds of powders are obtained by atomizing and spraying the mixed liquid while mixing one or more kinds of powders into one or more kinds of liquid without interruption. Another object of the present invention is to provide a vortex atomization nozzle that enables a simple spraying operation.

  The problem-solving means according to each claim and the resulting action will be described below.

  According to the first aspect of the present invention, there is provided a liquid supply port for introducing a liquid from the outside, a liquid passage tube for causing the liquid to vortex from the liquid supply port toward a nozzle tip, and an opening at the tip of the liquid passage tube. A liquid jet port that is ejected to the outside, a gas supply port that communicates from the vertical direction with respect to the ring-shaped gas passage tube that extends in the axial direction and surrounds the outer periphery of the liquid passage tube, and the gas passage tube A spiral groove that makes swirled gas a high-speed swirling airflow, a vortex chamber that is provided inside the nozzle tip, converts the high-speed swirling airflow into a high-speed swirling vortex, and a nozzle that focuses the high-speed swirling vortex in a conical shape. In a vortex atomization nozzle provided with a gas jet nozzle for jetting forward and atomizing the liquid by external mixing, a powder supply port for introducing powder from the outside is provided, and the liquid passage tube is To the liquid supply port And by communicating with the powder supply port upstream of the liquid supply port, the mixed liquid is atomized while mixing the powder into the liquid inside the liquid passage tube. It is a feature.

  Therefore, in this case, the liquid introduced from the liquid supply port does not flow backward toward the upstream side of the liquid passage pipe due to the strong negative pressure caused by the high-speed swirling vortex gas generated in front of the nozzle. On the other hand, since the powder supply port communicates upstream from the liquid supply port, the powder introduced onto the liquid passage tube as well as the liquid is mixed into the introduced liquid, and the liquid after mixing is upstream. Without sucking back into the gas supply port, that is, without entering the gas supply port provided upstream.

  According to a second aspect of the present invention, in the vortex atomization nozzle according to the first aspect, the powder supply port is provided with one or a plurality of powders provided to introduce one or more kinds of powders from the outside. The liquid supply port is one or a plurality of liquid supply ports provided for introducing one or more kinds of liquids from the outside, and the liquid passage pipe is the one or more liquid supply ports One or a plurality of liquids are communicated with one or a plurality of liquids inside the liquid passage pipe by communicating with all the powder supply ports upstream of all the liquid supply ports communicating with all the ports. It is characterized by mixing the powder.

  Therefore, in this case, any liquid introduced into the liquid passage pipe from each liquid supply port does not enter each powder supply port provided upstream. Furthermore, at the time of the spraying operation, one or more kinds of powders are mixed into one or more kinds of liquids in the liquid passage pipe according to the number of liquid supply ports and powder supply ports provided in the nozzle. .

  A third aspect of the present invention is the vortex atomization nozzle according to the first aspect, wherein the powder supply port opens at a rear end portion of the nozzle and communicates with the liquid passage pipe from the rear end portion of the nozzle. And the liquid supply port opens on the outer peripheral surface of the nozzle and communicates with the outer peripheral surface of the liquid passage tube.

  Therefore, in this case, the introduced liquid flows backward and does not enter the powder supply port at the uppermost stream of the liquid passage pipe, and is sucked into the liquid jet port by a strong negative pressure.

  In the invention according to claim 1, the introduced liquid does not enter or wet the powder supply port. Therefore, the first problem that the liquid hinders the supply of the powder or the powder is solidified to cause clogging and the powder is not introduced into the liquid passage tube is solved. Therefore, even if the liquid in which the powder is mixed in advance is not prepared before the spraying, the atomization spraying operation can be performed while the liquid is mixed in the powder.

  In the invention according to claim 2, since each powder supply port is provided upstream of all the liquid supply ports on the liquid passage pipe, the liquid may flow backward and enter each powder supply port. No. Therefore, the first problem due to clogging of the powder supply port is solved. Moreover, it becomes possible to perform the spraying operation while mixing three or more kinds of fluids, and the second problem is solved. That is, a mixed liquid while mixing a plurality of types of powders in one type of liquid or mixing a plurality of types of liquids and further mixing one or more types of powders into the mixed liquid. Can be atomized and sprayed.

  In the invention according to claim 3, since the liquid does not flow backward from the liquid supply port toward the nozzle rear end portion provided at the uppermost stream of the liquid passage pipe and does not enter the powder supply port, the mixed powder The first problem that the body is not introduced into the conventional internal mixing chamber 11 is solved, and the operation of atomization spraying can be performed while mixing the liquid into the powder.

  In addition, since the atomization nozzle according to the invention described in claims 1 to 3 is a vortex type, the liquid atomization effect by the high-speed swirling vortex gas generated at the tip of the nozzle is great. Even if the inner diameter of the liquid is large, it is possible to atomize the liquid. Therefore, by adjusting the inner diameter of the liquid passage tube and the powder supply port communicating with the liquid passage tube, even if powder having a large particle size is mixed, it becomes possible to atomize and spray without clogging. ing. Furthermore, if either the liquid supply port or the powder supply port is closed, it is possible to spray only the liquid or the powder alone, or mix a plurality of liquids or mix and spray a plurality of powders. It becomes.

  Hereinafter, preferred embodiments of the present invention (hereinafter simply referred to as examples) will be described with reference to FIGS.

  1 is a perspective view showing the appearance of a vortex atomization nozzle according to a first embodiment, FIG. 2 is an exploded perspective view of the atomization nozzle according to the first embodiment, and FIG. 3 is an atomization nozzle according to the first embodiment. FIG. 4 is a cross-sectional view taken along the line AA ′ when the configuration of the nozzle tip according to the first embodiment is different. FIG. 5A is a cross-sectional view taken along the line BB ′ of the atomizing nozzle according to the first embodiment, and FIG. 5B is a cross-sectional view taken along the line CC ′ of the atomizing nozzle according to the first embodiment. ) Is a perspective view showing the vicinity of the ring portion of the atomization nozzle according to the first embodiment, FIG. 6 is an axial sectional view showing a spraying state by the atomization nozzle, and FIG. 7 is an eddy current atomization nozzle according to the second embodiment. FIG. 8 is an axial sectional view of a conventional atomizing nozzle.

  First, the external configuration of the vortex atomization nozzle according to the first embodiment will be described with reference to FIG. The code | symbol 20 shown in FIG. 1 has shown the atomization nozzle main body which concerns on this invention. In the appearance configuration, the vortex atomizing nozzle body 20 is formed by fixing a nozzle plate 30 having an opening at the tip to a nozzle body 21 by a fastening ring 40 (see FIG. 2). An annular gas is formed at the tip of the nozzle body 21 by a liquid jet 22 and is formed in cooperation with the opening peripheral portion 22 a of the liquid jet 22 and the opening 31 of the jet plate cap 30. A jet port 23 opens so as to surround the liquid jet port 22.

  Next, members constituting the atomizing nozzle 20 will be described with reference to FIG. First, the nozzle body 21 is configured such that a liquid jet port 22 is provided at the tip, and a ring portion 24 having a taper shape tapered toward the nozzle head and having a spiral groove 25 surrounds the liquid jet port 22. It is provided as follows. In addition, a thin tube portion 26 provided with a male screw portion 27 is formed at an intermediate portion of the nozzle body 21.

  Here, the jet plate cap 30 is provided with an opening 31 having an inner diameter of a size necessary for forming the gas jet port 23 in cooperation with the liquid jet port 22 at the front end portion from FIG. The unit 32 is provided. Further, the spray plate cap 30 is formed so as to cover the ring portion 24 by forming the inside thereof into a hollow shape and a tapered shape corresponding to the shape of the ring portion 24. Then, a fastening ring 40 having an internal thread portion 41 formed on the inner side is put on the spray plate cap 30 and is screwed and fixed to the external thread portion 27 of the nozzle body 21 while pressing the flange portion 32.

  Further, a liquid supply port 28 for supplying the liquid R from the outside to the inside of the nozzle and a gas supply port 29 for supplying the gas T (described later) are provided on the outer peripheral side wall from the intermediate portion to the rear end portion of the nozzle body 21. 3 is formed, and a powder supply port 34 for mixing the powder P from the outside is formed at the rear end portion (described later in FIG. 3). A nut portion 35 is formed on the outer peripheral side wall of the rear end portion of the nozzle body 21 for applying a tool such as a spanner when the nozzle is assembled. In addition, in order to attach the tip of a liquid supply tube or the like to the inside of the opening of each of the supply ports 28, 29, and 34, for example, a female screw portion or the like so that a joint provided at the tube tip can be screwed It is desirable to form.

  Next, the internal structure of the atomizing nozzle 20 will be described with reference to FIG. Inside the nozzle body 21 is formed a liquid passage pipe 36 having a liquid jet port 22 at the tip, and a powder supply port 34 communicates with the liquid passage pipe 36 from the rear end, which will be described later. A liquid supply port 28 for supplying the liquid R communicates from the outer peripheral side surface of the nozzle body 21 (see FIG. 5B).

  3, the nozzle body 21 is provided with a body tip member 21a having a ring portion 24 formed at the tip and a hollow cylindrical portion 211 at the center of the ring portion 24, a liquid supply port 28, and the like. The center is comprised from the combination with the hollow body base member 21b. Further, a positioning flange portion 212 is provided on the outer periphery of the cylindrical portion 211 in the body front end member 21a, and a fitting hole 213 is provided in the center of the front end portion of the body base member 21b. The part is fixed by being inserted into and fitted into the fitting hole 213 until the flange part 212 comes into contact with the front end surface of the body base member 21b. At this time, the liquid passage tube 36 is formed by cooperation of the hollow portions of both the body tip member 21a and the body base member 21b.

  The body tip member 21a may be configured as a body tip member 21a 'in which the ring portion 24 and the hollow cylindrical portion 211 in FIG. 3 are separate members. That is, as shown in FIG. 4, the coil spring 216 and the separate ring member 240 having a through-hole at the center are sequentially passed from the tip of the hollow cylindrical member 215 having the positioning flange 214 on the outer periphery. The body tip member 21a 'can also be configured. In the assembly of the nozzle body 20, the ring member 240 is pressed against the upper inner wall of the jet plate cap 30 by the force pressed from above by the jet plate cap 30 and the reaction force pushed back from below by the compressed coil spring 216. To be held.

  Further, as shown in FIG. 3, a gas supply port 29 for supplying a gas T, which will be described later, opens to the outer peripheral side surface of the nozzle body 21 and has a circumferential cross section formed in a ring shape (see FIG. 5A). It communicates with a gas passage tube 37 formed so as to surround the passage tube 36. Further, the gas passage pipe 37 communicates with the cavity portion 38, the spiral groove 25 formed in the ring portion 24, the vortex generation chamber W, and the gas outlet 23 in order.

  The cavity portion 38 is a region formed so as to be surrounded by the lower surface of the ring portion 24 and the outer peripheral wall surface of the cylindrical portion 211 and the inner peripheral wall surface of the injection plate cap 30 in the body tip member 21a. On the other hand, the eddy current generating chamber W (see FIGS. 3 and 5C) includes an opening peripheral edge outer wall surface 22a of the liquid jet port 22, a ring-shaped groove 39 communicating with the spiral groove 25, and an upper portion of the injection plate cap. This is a region formed so as to be surrounded by the wall surface 33.

  Next, the flow of the gas T when the atomizing nozzle 20 of Example 1 is used will be described with reference to FIG. The gas T introduced from the gas supply port 29 is directed to the gas outlet 23 while colliding with the inner wall surface of the gas passage pipe 37 having a circular cross section in the circumferential direction (see FIG. 5A). By proceeding in a spiral shape, the spiral groove 25 is equally penetrated while maintaining a rectified state in the cavity 38 on the lower surface of the ring portion. The gas T that has entered the spiral groove 25 becomes a high-speed swirl airflow, is swirled in the vortex generating chamber W, and becomes a high-speed swirl vortex gas T ′ and is ejected from the annular gas outlet 23.

  At this time, the high-speed swirling vortex gas T ′ is ejected in a tapered conical shape connecting the focal point F in front of the nozzle, and the liquid PR, which will be described later, is sucked toward the liquid ejection port 22 toward the inside of the liquid passage tube 36. Generate strong negative pressure.

  Furthermore, the flow of the powder P and the liquid R when the atomization nozzle of Example 1 is used will be described with reference to FIG. The powder P mixed in the liquid is supplied into the liquid passage tube 36 from the powder supply port 34 provided in the uppermost stream of the liquid passage tube 22 by the negative pressure of the high-speed swirling vortex gas T ′. The inside of 36 is sucked toward the liquid jet port. On the other hand, the liquid R is supplied into the liquid passage pipe 36 from the liquid supply port 28 by the negative pressure as in the case of the powder P (see FIG. 5B). At this time, the liquid is primarily crushed when it collides with the inner wall surface of the liquid passage tube 36 and the powder P is mixed therein. At this time, the powder P and the liquid R become a primary liquid PR well mixed in the liquid passage pipe, and are sucked toward the liquid jet port 22 and ejected from the liquid jet port 22 to the front of the nozzle. The flow of the powder P and the liquid R does not change even when an introduction pressure different from the negative pressure is applied to the powder supply port 34 and the liquid supply port 28, respectively.

  Furthermore, atomization of the primary liquid PR in the atomization nozzle 20 of Example 1 will be described with reference to FIG. The primary liquid PR ejected from the liquid ejection port 22 is secondarily crushed and atomized by colliding with a high-speed swirling vortex gas T ′ ejected in a tapered conical shape from the gas ejection port 23 at a focal point F generated in front of the nozzle. The liquid PRT ′ is sprayed forward.

  Next, the vortex atomization nozzle according to the second embodiment will be described with reference to FIG. The atomization nozzle according to the second embodiment is a fluid supply port that is provided at only one place in the atomization nozzle of the first embodiment and communicates with an intermediate portion of the liquid passage pipe (the liquid supply port 28 in the first embodiment). Are provided (two in FIG. 6).

  That is, the vortex atomization nozzle 50 of the second embodiment is provided with a plurality of fluid supply ports (for liquid or powder) communicating with each other in the middle portion of the liquid passage tube 52, for example, the fluid supply port 1 (reference numeral 53). Is a powder supply port and the fluid supply port 2 (reference numeral 54) is a liquid supply port. In the liquid passage tube 52, two types of powder are mixed into the specific liquid to be atomized and atomized. Can work. Further, by using both the fluid supply ports 1 and 2 as liquid supply ports, it is possible to perform atomization spraying work while mixing two kinds of liquids and further mixing a specific powder.

As shown in FIG. 7, the vortex atomization nozzle 50 of Example 2 has only two fluid supply ports (53, 54). However, the length L of the nozzle body 51 is formed so that the fluid supply port (53, 54) does not interfere with the gas supply port 55 and the gas passage pipe 56, and from the viewpoint of preventing clogging. Three or more fluid supply ports can be provided depending on the number of types of liquid to be mixed and powder to be mixed, provided that no liquid is supplied from the upstream side of the body supply port.
In that case, mix three or more types of powder into one type of liquid, mix one or more types of powder while mixing three or more types of liquid, or mix multiple types of powder while mixing multiple types of liquid. Atomization spray can be performed while performing operations such as mixing.

  Further, in the atomization nozzle of the second embodiment, a plurality (two or more) of fluid supply ports in the nozzle body 51 are provided on the same circumferential section as in the conventional technique (see FIG. 8A). Is also possible. However, if the powder and the liquid are supplied from the same circumferential cross section, it is considered that the powder supply port is clogged as in the prior art. Therefore, when the fluid supply ports are provided on the same circumferential cross section, the fluid supplied from each supply port is unified with either the liquid or the powder, or as shown in FIG. It is desirable to dispose these in the axial direction. The body front end member 21a is fixed by inserting and fitting the rear end portion into the fitting hole 513 provided at the front end portion of the body base member 51b as in the first embodiment. Further, similarly to FIG. 4, a body tip member 21a 'can be used instead of the body tip member 21a.

  In view of the above, the atomization nozzle according to the present invention is, for example, a powdery particulate substance or the like (abrasive or other powdery multiple drugs) in a spray liquid (mixing one or more liquids). Since it can be sprayed onto an object while being mixed, it can be used as an applicator, a coating device, or simply as a mixing device for liquid and powder. Further, by closing the fluid supply port that is not used in the first embodiment, it is possible to perform spraying only with powder or atomizing the liquid, and also in the second embodiment, closing the fluid supply port that is not used. Thus, it is possible to reduce the kind of medicine to be mixed and atomize and spray, to mix only a plurality of liquids and to atomize and spray, or to mix and spray only a plurality of powders. Therefore, it can be said that the nozzle according to the present invention is meaningful as a atomizing nozzle capable of forming a wide variety of mixing modes or spraying modes regardless of whether the liquid or powder is used.

FIG. 3 is a perspective view illustrating an appearance of the vortex atomization nozzle according to the first embodiment. FIG. 3 is an exploded perspective view of the atomization nozzle according to the first embodiment. FIG. 3 is a cross-sectional view of the atomizing nozzle according to the first embodiment, taken along line A-A ′. FIG. 6 is a cross-sectional view taken along line A-A ′ when the nozzle tip configuration according to the first embodiment is different. FIG. 4 is a circumferential cross-sectional view of the atomization nozzle according to the first embodiment. (A) B-B 'sectional drawing of the atomization nozzle which concerns on Example 1. FIG. (B) C-C 'sectional drawing of the atomization nozzle which concerns on Example 1. FIG. (C) The perspective view showing the ring part vicinity of the atomization nozzle which concerns on Example 1. FIG. FIG. 3 is an axial cross-sectional view showing the state of spraying by the atomization nozzle according to the first embodiment. FIG. 6 is an axial sectional view of a vortex atomization nozzle according to a second embodiment. The axial direction sectional drawing of the atomization nozzle which concerns on a prior art. (A) Sectional drawing showing a liquid channel | path. (B) Sectional drawing showing a gas passage.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Eddy current type atomization nozzle main body 22 Liquid ejection port 23 Gas ejection port 25 Spiral groove 28 Liquid supply port 29 Gas supply port 34 Powder supply port 36 Liquid passage pipe 50 Eddy current type atomization nozzle main body 52 Liquid passage tube 53 Fluid supply port 1 (powder supply port)
54 Fluid supply port 2 (liquid supply port)
F Focus P Powder R Liquid T Gas T 'High-speed swirling vortex gas W Vortex chamber

Claims (3)

A liquid supply port for introducing liquid from the outside, a liquid passage tube for vortexing the liquid from the liquid supply port toward the nozzle tip, and a liquid that opens at the tip of the liquid passage tube and ejects the liquid to the outside A jet outlet, a gas supply port communicating from the vertical direction with respect to the ring-shaped gas passage tube extending in the axial direction surrounding the outer periphery of the liquid passage tube, and a gas swirling through the gas passage tube is a high-speed swirling airflow And a spiral groove provided inside the tip of the nozzle, which vortexes the high-speed swirling airflow, and the high-speed swirling vortex is ejected forward of the nozzle so as to focus in a conical shape. In a vortex atomization nozzle provided with a gas outlet for atomizing a liquid,
A powder supply port for introducing powder from the outside is provided, and the liquid passage tube communicates with the liquid supply port and communicates with the powder supply port upstream of the liquid supply port, A vortex atomization nozzle characterized by atomizing the mixed liquid while mixing the powder into the liquid inside a liquid passage pipe.   The powder supply port is one or a plurality of powder supply ports provided for introducing one or more types of powder from the outside, and the liquid supply port receives one or more types of liquid from the outside. One or more liquid supply ports provided for introduction, wherein the liquid passage tube communicates with all of the one or more liquid supply ports and upstream of all the liquid supply ports communicating with each other; The eddy current type according to claim 1, wherein one or more kinds of powder are mixed in one or more kinds of liquids inside the liquid passage pipe by communicating with all of the powder supply ports. Atomization nozzle.   The powder supply port opens at a rear end portion of the nozzle and communicates with the liquid passage pipe from the rear end portion of the nozzle; the liquid supply port opens at an outer peripheral side surface of the nozzle; and the liquid 2. The vortex atomizing nozzle according to claim 1, wherein the nozzle is in communication with the outer peripheral surface of the passage pipe.

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