JP2013244422A - Two liquid mixture mist-forming nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two liquid mixture mist-forming nozzle of which the efficiency of atomization of a first liquid or a second liquid can be improved.SOLUTION: A two liquid mixture mist-forming nozzle 10 includes a first and second nozzle core 30, 40 in two positions in the longitudinal direction of a mist forming flow passage 11 through which a compressed gas passes, a plurality of side holes 36A, 36B are provided around a first center hole 33 provided in the first nozzle core 30 and a plurality of side holes 46 is provided around a second center hole 43 provided in the second nozzle core 40. The compressed gas having passed through the side holes 36A, 36B is caused to collide with a passing area of the first liquid mist in the first mist forming chamber 15 and the compressed gas containing the first liquid mist having passed through the side hole 46 is caused to collide with a passing area of the second liquid mist in the second mist forming chamber 17.

Description

  The present invention relates to a two-liquid mixed mist generating nozzle capable of generating a two-liquid mixed mist in which a second liquid mist particle is combined with a first liquid mist particle.

  As a conventional two-component mixed mist generating nozzle of this type, the first reduced diameter wall, the first, in order from the inlet side, between the inlet and outlet of the main flow path to which the compressed gas is fed. A mist generation chamber, a second reduced diameter wall, and a second mist generation chamber are known (for example, see Patent Document 1). In this two-component mixed mist generating nozzle, the first liquid is supplied to the center hole provided in the first reduced diameter wall and the second reduced diameter wall is provided with the compressed gas flowing in the main flow path. The second liquid is supplied to the center hole. Then, a 1st liquid is sent to a 1st mist production | generation chamber with compressed gas, and the mist of a 1st liquid is produced | generated. Further, when the compressed gas containing the mist of the first liquid is fed from the first mist generation chamber to the second reduced diameter wall, the mist of the second liquid is generated in the second mist generation chamber. At the same time, the mist particles of the first liquid and the mist particles of the second liquid are combined to form a two-liquid mixed mist.

Japanese Patent No. 3574023 (paragraphs [0032] to [0036], FIG. 1)

  By the way, in order to increase the generation amount of the two-liquid mixed mist, it is necessary to mist the first liquid and the second liquid more reliably. In this respect, the conventional two-liquid mixed mist generating nozzle is further changed. There was room for improvement.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a two-component mixed mist generating nozzle capable of improving the efficiency of mist formation of the first liquid or the second liquid.

  The two-component mixed mist generating nozzle according to the invention of claim 1 made to achieve the above object extends in a straight line, and the compressed gas is fed from the inlet at one end to the outlet at the other end. A main channel, and first and second reduced-diameter walls projecting from the inner surface of the main channel and narrowing down two places in the longitudinal direction of the main channel and having a center hole as a part of the main channel at the center The first sub-channel for supplying the first liquid by communicating with the center hole of the first reduced-diameter wall on the relatively inlet side of the first and second reduced-diameter walls from the side. A second sub-flow channel for communicating with the center hole of the second reduced-diameter wall on the relatively outlet side from the side, and supplying the second liquid; A first mist generating chamber disposed between the two reduced-diameter walls and configured to mist the first liquid, and the second reduced-diameter wall interposed therebetween. And a second mist generation chamber for mist formation of the second liquid, and the mist particles of the second liquid are combined with the mist particles of the first liquid. In the two-component mixed mist generating nozzle that generates the two-component mixed mist, it passes through the side position of the center hole in both the first and second or one of the reduced diameter walls, and goes from the inlet side toward the outlet side. It is characterized in that it is provided with side holes that are inclined so as to approach the center hole and have a small fluid passage cross-sectional area with respect to the center hole.

  The invention of claim 2 is characterized in that, in the two-component mixed mist generating nozzle according to claim 1, a plurality of side holes are arranged in a ring shape so as to surround the center hole.

  According to a third aspect of the present invention, in the two-component mixed mist generating nozzle according to the first or second aspect, a plurality of types of side holes having different inclination angles with respect to the central axis of the center hole are provided on the side of the common center hole. It has features.

  According to a fourth aspect of the present invention, in the two-component mixed mist generating nozzle according to any one of the first to third aspects, the diameter-reduced wall is gradually disposed upstream of the center hole toward the center hole. A rear taper hole having a reduced diameter is formed as a part of the main flow path, and a front taper hole gradually increasing in diameter as being away from the center hole is formed on the downstream side of the center hole in the reduced diameter wall. The side hole is characterized in that it is formed through the reduced diameter wall so as to communicate between the inner surface of the rear tapered hole and the inner surface of the front tapered hole.

  According to a fifth aspect of the present invention, in the two-component mixed mist generating nozzle according to the fourth aspect, a rear tapered hole and a front tapered hole are formed in the second reduced diameter wall, and the second mist generating chamber includes A front tapered hole formed in the diameter-reduced wall of 2; an intermediate tapered hole connected to the downstream end of the front tapered hole and having a diameter reduced toward the downstream; and a downstream end of the intermediate tapered hole Further, it has a feature in that it is composed of a terminal taper hole which is steeper than the intermediate taper hole and is reduced in diameter toward the downstream side at an inclination angle.

  The invention of claim 6 is characterized in that, in the two-component mixed mist generating nozzle according to any one of claims 1 to 5, the inner surface of the main flow path is constituted by a member having liquid repellency. Have.

  The invention of claim 7 is the two-component mixed mist generating nozzle according to any one of claims 1 to 6, wherein the first nozzle core, the first sleeve, The second nozzle core and the second sleeve are fitted in order and fixed in the axial direction, and the first and second sleeves constitute the inner surfaces of the first and second mist generating chambers, The first and second nozzle cores form the first and second reduced diameter walls, and each nozzle core has one first and second sub-flow path communicating with the center hole of the first and second nozzle cores. A core side sub through hole that is provided only through the nozzle core and penetrates into the center hole from the outer surface of the nozzle core, and a main body side sub that penetrates from the outer surface of the nozzle body into the component housing hole and is coaxial with the core side sub through hole. It is characterized by being composed of through holes.

  According to an eighth aspect of the present invention, in the two-component mixed mist generating nozzle according to the seventh aspect, a plurality of main body side sub through holes are provided around each nozzle core, and a female screw is formed on the inner surface of each main body side sub through hole. In a state where any one main body side sub through hole is arranged coaxially with the core side sub through hole, the nozzle core can be prevented from rotating by a screw threadedly engaged with the female screw in the other main body side sub through hole. However, it has characteristics.

  A ninth aspect of the invention is the two-component mixed mist generating nozzle according to any one of the first to eighth aspects of the present invention, wherein the base end portions of a plurality of branch flow channel tubes are gathered together to form a basic flow channel. It has a feature in that it has a branch outflow part, the main channel is connected to the outlet of the main channel, and the two-liquid mixed mist can be discharged from the tip of each branch channel tube.

[Inventions of Claims 1 and 2]
According to the two-component mixed mist generating nozzle of claim 1, the first liquid enters the center hole of the first reduced-diameter wall from the first sub-channel in a state where the compressed gas flows in the main channel. When the second liquid is supplied from the second sub-flow path into the center hole of the second reduced diameter wall, the first liquid together with the compressed gas is sent to the first mist generating chamber. The mist of the first liquid is generated in the first mist generating chamber. The compressed gas containing the mist of the first liquid is fed from the first mist generation chamber to the center hole of the second reduced diameter wall, and the second mist generation chamber is supplied to the second mist generation chamber. And a two-liquid mixed mist in which the first liquid mist particles and the second liquid mist particles are combined.

  Here, if a side hole is provided in the first reduced-diameter wall, the compressed gas that has passed through the side hole can collide with the passage region of the first liquid mist in the first mist generating chamber. The efficiency of mist formation of one liquid can be increased. Further, as in the invention of claim 2, when the side holes are arranged in a ring shape so as to surround the center hole and the compressed gas collides from a plurality of directions, the efficiency of mist formation can be further increased. it can.

  If a side hole is provided in the second reduced diameter wall, the efficiency of mist formation of the second liquid can be increased as in the case where the side hole is provided in the first reduced diameter wall. The mist particles of the first liquid that have passed can collide with the mist particles of the second liquid, and the coalescence of the mist particles of the first and second liquids can be promoted. Further, as in the invention of claim 2, when the side holes are arranged in a plurality of rings so as to surround the center hole and the compressed gas containing the mist of the first liquid is caused to collide from a plurality of directions, the second The efficiency of mist formation of the liquid can be further increased, and the coalescence of the mist particles of the first and second liquids can be further promoted.

  Further, if side holes are provided in both the first and second diameter-reduced walls, the efficiency of mist formation of the first and second liquids is improved, and the mist particles of the first and second liquids are combined. Both effects of promotion can be achieved.

  Here, the first and second liquids are liquids (for example, water and oil) that are separated even if they are premixed before mist formation, or if they are premixed, the chemical reaction may proceed. Or a different two-component liquid (for example, a two-component adhesive). Also, if the first liquid is used as a lubricating oil for metal cutting and the second liquid is water, the two-liquid mixed mist ejected from the two-liquid mixed mist generating nozzle can be used for metal cutting. can do.

[Invention of claim 3]
According to the invention of claim 3, due to the difference in the inclination angle of the side hole, the fluid (compressed gas or mist of the first liquid) that has passed through the side hole in the passage area of the mist generated downstream of the center hole. The mist, the compressed gas, and the mist can collide with each other over a wide range by changing the position where the compressed gas) includes.

[Invention of claim 4]
According to the invention of claim 4, since the downstream opening of the side hole is formed in the inner surface of the front tapered hole, the fluid (compressed gas) that has passed through the side hole in the mist generated on the downstream side of the center hole. Alternatively, the compressed gas containing the mist of the first liquid can be efficiently collided.

[Invention of claim 5]
According to the invention of claim 5, by reducing the diameter of the second mist generation chamber toward the outflow port, it is possible to increase the flow velocity of the fluid in the second mist generation chamber and allow the fluid to flow out from the outflow port. In addition, before the fluid (compressed gas including the first and second liquid mists and the two-liquid mixed mist) that has passed through the center hole of the second reduced diameter wall flows out from the outlet, the second reduced diameter is obtained. The fluid (compressed gas containing the mist of the first liquid) that has passed through the side holes of the wall can be collided. That is, it is possible to promote the formation of the second liquid mist and the generation of the two-component mixed mist in the second mist generating chamber.

[Invention of claim 6]
According to the sixth aspect of the invention, since the inner surface of the main flow path is constituted by a member having liquid repellency, the liquid adhering to the inner surface of the main flow path can be easily discharged. For example, the liquid can be discharged from the outflow port by directing the outflow port downward or by blowing air (only the compressed gas flows without supplying the first and second liquids). Thereby, the inside of the main channel can be kept clean.

[Invention of Claim 7]
According to the invention of claim 7, since the first and second reduced diameter walls are constituted by the first and second nozzle cores which are separate parts from the nozzle body, the center hole, side hole, first and second The degree of freedom and workability of the design of the second sub-channel are improved. In addition, since the first and second sleeves are configured as separate parts from the nozzle body, the degree of freedom in design and workability of the first mist generation chamber and the second mist generation chamber are improved.

  Here, a plurality of sub flow paths may be provided in one nozzle core. In that case, if the liquid is not supplied in a balanced manner from each sub flow path, the nozzle core may cause slight vibration in the nozzle body. . On the other hand, according to the present invention, since only one sub flow path is provided in each of the first and second nozzle cores, the nozzle core can be reliably stabilized in the nozzle body.

[Invention of Claim 8]
According to the invention of claim 8, the liquid supply source can be arbitrarily selected and connected from among the plurality of main body side sub through holes formed in the nozzle body, and the selected main body side sub through hole In addition, the nozzle core can be prevented from rotating with a screw so that one core-side sub through hole formed in the nozzle core communicates. At this time, the other main body side sub through hole that is not in communication with the core side sub through hole can be blocked with a screw, and the nozzle core can be prevented from rotating using the screw.

[Invention of claim 9]
According to invention of Claim 9, compared with the case where a branch outflow part is not provided, a two-component mixed mist can be sprayed to a wide area | region.

The top view of the two-component mixed mist production | generation nozzle which concerns on 1st Embodiment of this invention. (A) Front end view, (B) Rear end view of two-component mixed mist generating nozzle Sectional drawing in the EE cut surface of FIG. Exploded sectional view of two-component mixed mist generating nozzle (A) Front end view of the first nozzle core, (B) Side view, (C) Cross-sectional view at FF cut surface, (D) Rear end view, (A) Half sectional view of second nozzle core, (B) Rear end view (A) Front end view of a nozzle head according to the second embodiment, (B) Cross-sectional view taken along HH plane (A) Rear end view of branch outflow pipe, (B) Cross section at GG cut surface, (C) Front end view Side sectional view of nozzle core according to modification Rear end view of nozzle core according to modification

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The two-component mixed mist generating nozzle 10 shown in FIG. 3 has a substantially cylindrical shape, and a mist generating flow path 11 is formed in the axial center portion thereof. The mist generation flow path 11 extends linearly, and the opening at the start end of the mist generation flow path 11 opened to the center of the rear end face of the two-component mixed mist generation nozzle 10 is a gas supply port 12 (mainly supplied with compressed gas). The end opening of the mist generation flow path 11 opened to the front end surface of the two-component mixed mist generating nozzle 10 is provided as an “inlet” of the invention as a mist discharge port 13 through which the two-component mixed mist is discharged. Is provided. The gas supply port 12 and the mist discharge port 13 are both tapered screws, and a gas supply pipe 93 can be connected to the gas supply port 12 (see FIG. 1), and the mist discharge port 13 is not shown. An extension nozzle can be connected. Then, a two-component mixed mist is generated in the process in which compressed gas (for example, compressed air) supplied from the gas supply port 12 flows through the mist generation flow path 11 and is discharged from the mist discharge port 13. In the present embodiment, the entire mist generation flow path 11 extending linearly corresponds to the “main flow path” of the present invention. The gas supply port 12 corresponds to the “inlet of the main channel” in the present invention, and the mist discharge port 13 corresponds to the “outlet of the main channel” in the present invention. Of the two-component mixed mist generating nozzle 10, the gas supply port 12 side is the “upstream side” in the present invention, and the mist discharge port 13 side is the “downstream side” in the present invention.

  As shown in FIG. 3, in the mist generation flow path 11, the first center hole 33, the first mist generation chamber 15, and the second center are sequentially arranged from the gas supply port 12 side toward the mist discharge port 13 side. A hole 43, a second mist generating chamber 17, and a discharge guide portion 18 are provided. The fluid passage cross-sectional area in the mist generation channel 11 is gradually reduced in the order of the first mist generation chamber 15, the second mist generation chamber 17, and the discharge guide portion 18.

  The outer shell of the two-component mixed mist generating nozzle 10 is composed of a nozzle body 20 having a cylindrical structure. The nozzle body 20 is made of metal or resin (in this embodiment, aluminum whose surface is subjected to hard alumite treatment), and a component housing hole 20A having a circular cross section passes through the axial center. Both end portions of the component housing hole 20A serve as the gas supply port 12 and the mist discharge port 13, and a plurality of components forming the mist generation flow path 11 are incorporated in the component housing hole 20A. That is, as shown in FIG. 3, the first nozzle core 30, the first sleeve 51, the second nozzle core 40, the second sleeve 52, and the like in order from the gas supply port 12 side toward the mist discharge port 13 side. The nozzle front end pipe 53 is fitted and fixed in the axial direction. Through holes are formed in the axial center portions of the first nozzle core 30 and the like, and the mist generation flow path 11 is configured by connecting the through holes to each other.

  That is, the first center hole 33 of the mist generation flow path 11 is formed to penetrate through the central portion of the first nozzle core 30, and the second center hole 43 penetrates into the central portion of the second nozzle core 40. Is formed. The first mist generating chamber 15 is formed by the first nozzle core 30, the second nozzle core 40, and the first sleeve 51. Further, the second mist generating chamber 17 and the discharge guide portion 18 are formed by the second nozzle core 40, the second sleeve 52, and the nozzle front end pipe 53.

  The first sleeve 51 has a cylindrical pipe shape with a constant inner and outer diameter between the first nozzle core 30 and the second nozzle core 40. The second sleeve 52 has a shorter ring shape than the first sleeve 51, and includes a tapered hole 52 </ b> A that gradually decreases in diameter as it moves away from the second nozzle core 40 (toward the downstream side). Further, the through hole formed in the axial center portion of the nozzle front end pipe 53 is a tapered hole 53A whose diameter is reduced as the second sleeve 52 side (upstream side) is separated from the second sleeve 52. A portion from the small diameter end portion (downstream side end portion) of the tapered hole 53A to the mist discharge port 13 is a cylindrical hole 53B having a constant inner diameter constituting the discharge guide portion 18 of the mist generation flow path 11. The taper hole 52A of the second sleeve 52 and the taper hole 53A of the nozzle front end pipe 53 are continuous without a step, and the taper hole 53A of the nozzle front end pipe 53 is slightly smaller than the taper hole 52A of the second sleeve 52. The slope is steep. Here, the first sleeve 51, the second sleeve 52, and the nozzle front end pipe 53 are made of water-repellent resin (for example, fluororesin, specifically, polytetrafluoroethylene resin).

  As shown in FIGS. 3 and 4, the nozzle body 20 includes a nozzle body 21 having a gas supply port 12 and a nozzle having a mist discharge port 13 at an intermediate position between the second nozzle core 40 and the mist discharge port 13. The head 23 can be divided. As shown in FIG. 4, a screw connection 22 is formed at the front end of the nozzle body 21 opposite to the gas supply port 12. On the other hand, the nozzle head 23 has a disk portion 24 having a diameter larger than the inner diameter of the screw connection portion 22 and the front end surface of the nozzle body 21 being abutted thereon, and a cylindrical screw portion 25 protruding upstream from the disk portion 24. And. And the inner peripheral surface of the screw connection part 22 and the outer peripheral surface of the cylindrical screw part 25 are screwed together, and the nozzle main body 21 and the nozzle head 23 are being fixed integrally. In addition, an annular packing groove 24A is recessed in the rear surface of the disk portion 24 where the front end surface of the nozzle body 21 is abutted, and the nozzle body is sealed by the seal packing 26 fitted in the packing groove 24A. 21 and the nozzle head 23 are sealed (see FIG. 3).

  The nozzle front end pipe 53 is inserted and fitted into the component housing hole 20 </ b> A of the nozzle head 23 from the opening opposite to the mist discharge port 13. Annular step portions 23A and 53C are formed on the inner surface in the axial direction of the component housing hole 20A of the nozzle head 23 and on the outer surface of the intermediate portion in the axial direction of the nozzle front end pipe 53, respectively. , 53C abut, and the movement of the nozzle front end pipe to the mist discharge port 13 side is prohibited (see FIG. 3). Further, as shown in FIG. 4, a C-shaped retaining ring 63 is assembled at a position near the gas supply port 12 in the component housing hole 20 </ b> A of the nozzle body 21, and the nozzle head 23 is screwed to the nozzle body 21. When tightened to the portion 22, the first nozzle core 30, the first sleeve 51, the second nozzle core 40, and the second sleeve 52 fitted in the component housing hole 20 </ b> A of the nozzle body 21 are connected to the nozzle front end pipe 53 and the C-shaped stopper. It is sandwiched between the rings 63. Thereby, each component fitted in the component accommodation hole 20A is fixed in the axial direction.

  As shown in FIG. 3, a first liquid supply port 27 (corresponding to the “main body side sub through hole” of the present invention) is provided at a side position of the first nozzle core 30 in the nozzle body 21. . The 1st liquid supply port 27 has penetrated the cylinder wall of the nozzle main body 21 in the direction orthogonal to the axial direction of 20 A of component accommodating holes (refer FIG. 4). Further, the first liquid supply port 27 has a large diameter portion, a medium diameter portion, and a small diameter portion in order from the outer surface of the nozzle body 21 toward the component housing hole 20A, and a female screw is formed on the inner peripheral surface of the medium diameter portion. 27A is formed. A liquid supply tube 91 (see FIG. 1) for supplying the first liquid can be screwed to the female screw 27A.

  The first liquid supply port 27 is provided at a plurality of positions on the side of the first nozzle core 30, and any one of the plurality of first liquid supply ports 27 is selected to connect the liquid supply tube 91. It is possible to do. In the present embodiment, the first liquid supply ports 27 and 27 are provided at two positions on the nozzle body 21 on a straight line orthogonal to the component housing hole 20A. Three or more first liquid supply ports 27 may be provided.

  As shown in FIG. 3, a second liquid supply port 28 having the same configuration as the first liquid supply port 27 (the “main body side sub-through hole of the present invention” is provided at a side position of the second nozzle core 40 in the nozzle body 21. Is equivalent to “)”. A liquid supply tube 92 (see FIG. 1) for supplying the second liquid can be screwed and connected to the female screw 28A formed on the inner peripheral surface of the second liquid supply port 28. ing.

  The second liquid supply port 28 is also provided at a plurality of positions on the side of the second nozzle core 40, and any one of the plurality of second liquid supply ports 28 is selected to connect the liquid supply tube 92. It is possible to do. In the present embodiment, the second liquid supply ports 28 are provided at two positions on the nozzle body 21 on a straight line orthogonal to the component housing hole 20A. Three or more second liquid supply ports 28 may be provided.

  The first liquid supply port 27 and the second liquid supply port 28 are arranged side by side in the axial direction of the nozzle body 21. In addition, a pair of plane portions 20B and 20B extending in the axial direction of the nozzle body 21 are formed on the outer surface of the nozzle body 21. The first plane portions 20B and 20B have a first pair of plane portions 20B and 20B. The liquid supply port 27 and the second liquid supply port 28 are open (see FIG. 2B). In addition to the pair of flat portions 20B, a fixing flat portion 20C is formed on the outer surface of the nozzle body 21. The fixing flat portion 20C is formed of a plane perpendicular to the pair of flat portions 20B, extends in the axial direction of the nozzle body 21, and is fixed at a plurality of positions in the longitudinal direction of the fixing flat portion 20C. A screw hole 20D is formed (see FIG. 1). The fixing screw hole 20D has a bag hole structure in which the back is closed (not communicated with the component housing hole 20A), and the base (not shown) and the two-liquid mixed mist generating nozzle 10 are fixed by a bolt (not shown). Is possible.

  As shown in FIG. 5, the first nozzle core 30 has a flat cylindrical shape having a large radial direction with respect to the axial direction, and the first throat portion 14 is formed through the central portion thereof. As shown in FIG. 5C, the first throat portion 14 includes tapered holes 31 and 32 having a shape in which both end surfaces in the axial direction are recessed in a mortar shape, and the small diameter end portions of both the tapered holes 31 and 32. The first center holes 33 having a circular cross section and a constant inner diameter communicate with each other. That is, in the first throat portion 14, the portion where the fluid passage cross-sectional area is most narrowed is the first center hole 33, and the rear tapered hole 31 upstream of the first center hole 33 is the first center hole 33. The diameter of the first tapered hole 32 gradually decreases toward the first center hole 33, and the diameter of the front tapered hole 32 downstream of the first center hole 33 gradually increases as the distance from the first center hole 33 increases. The inclination angle of the rear taper hole 31 is slightly gentler than the inclination angle of the front taper hole 32, and the rear taper hole 31 is greatly expanded. The fluid passage cross-sectional area of the first center hole 33 is smaller than the fluid passage cross-sectional areas of the discharge guide portion 18 and the second center hole 43 (see FIG. 3).

  As shown in FIG. 3, the first nozzle core 30 has a first liquid supply path 34 extending from the first center hole 33 toward the outer side in the radial direction and opened to the outer peripheral surface (the “core side sub-penetration” of the present invention). 1) corresponding to “hole” is formed. The first liquid supply path 34 is configured by, for example, a cylindrical hole having substantially the same diameter as the first center hole 33, and the opening end on the outer peripheral surface of the first nozzle core 30 is expanded in a tapered shape. (See FIGS. 5A, 5B, and 4D). As shown in FIG. 3, the first liquid supply path 34 is arranged coaxially with and communicates with one of the two first liquid supply ports 27, 27 penetratingly formed in the nozzle body 21, and the present invention. The “first sub-channel” is configured. That is, the first liquid is supplied to the first center hole 33 through the first liquid supply port 27 and the first liquid supply path 34.

  In the outer peripheral surface of the first nozzle core 30, a rotation stopper recess 35 is recessed and formed at a position opposite to the opening end of the first liquid supply path 34. That is, when the first liquid supply path 34 is arranged coaxially with one first liquid supply port 27, the other first liquid supply port 27 and the rotation stopper recess 35 are arranged coaxially. A screw 60 is screwed into the female screw 27A of the other first liquid supply port 27, and a tip protrusion 61 provided on the screw 60 engages with the anti-rotation recess 35 so that the first nozzle core 30 is engaged. Is prevented from rotating with respect to the nozzle body 21. That is, when the first liquid supply path 34 and one first liquid supply port 27 are communicated with each other, the other first liquid supply port 27 that is not communicated with the first liquid supply path 34 is connected by the screw 60. The first nozzle core 30 can be prevented from rotating by using the screw 60 while closing.

  As shown in FIG. 3, a plurality of (for example, six in the present embodiment) side holes 36 </ b> A and 36 </ b> B are formed through the first nozzle core 30 at a lateral position away from the first center hole 33. Has been. As shown in FIG. 5C, the side holes 36 </ b> A and 36 </ b> B are provided independently without communicating with the first center hole 33. Specifically, each of the side holes 36 </ b> A and 36 </ b> B is open to the inner surface of the rear taper hole 31 and the inner surface of the front taper hole 32 in the first throat portion 14, and from the rear taper hole 31 to the front taper hole 32. As it goes, it is inclined so as to approach the first center hole 33 (specifically, its central axis). Further, as shown in FIG. 5D, the plurality of side holes 36 </ b> A and 36 </ b> B are arranged in an annular shape so as to surround the first center hole 33. The fluid passage sectional area per one of the side holes 36 </ b> A and 36 </ b> B is smaller than the fluid passage sectional area of the first center hole 33. Specifically, for example, the ratio of the diameter of the first center hole 33 to the diameters of the side holes 36A and 36B is about 2: 1.

  The plurality of side holes 36A and 36B are composed of a first side hole 36A and a second side hole 36B having different inclination angles with respect to the central axis of the first center hole 33, and these two types of side holes 36A and 36B. Are provided in the same plural number (for example, three in this embodiment).

  36 A of 1st side holes are arrange | positioned in the rotationally symmetric (specifically 3 times symmetrical) position centering | focusing on the center axis | shaft of the 1st center hole 33, and each of several 1st side hole 36A is arranged. The focal position where the central axes intersect is configured to be coaxial with the central axis of the first center hole 33. Similarly, the second side hole 36B is disposed at a rotationally symmetric (specifically, three-fold symmetry) position with the center axis of the first center hole 33 as the center of symmetry, and a plurality of second side holes 36B. The focal position where each central axis of 36B intersects is coaxial with the central axis of the first center hole 33 and is closer to the first nozzle core 30 than the focal position of the first side hole 36A. Has been. The first nozzle core 30 is made of a resin (for example, polyphenylene sulfide resin or fluororesin) having water repellency compared to the metal constituting the nozzle body 20.

  The second nozzle core 40 has a cylindrical shape that is longer in the axial direction than the first nozzle core 30, and the second throat portion 16 is formed through the axial center portion of the second nozzle core 40. As shown in FIG. 6 (A), the second throat portion 16 includes tapered holes 41 and 42 in which both axial end surfaces are recessed in a mortar shape, and the small diameter end portions of both the tapered holes 41 and 42 are provided. A second center hole 43 having a circular cross section and a constant inner diameter communicates with each other. That is, in the second throat portion 16, the portion where the fluid passage cross-sectional area is most narrowed is the second center hole 43, and the rear taper hole 41 upstream from the second center hole 43 is the second center hole 43. The diameter is gradually reduced toward the second center hole 43, and the diameter of the front tapered hole 42 on the downstream side of the second center hole 43 is gradually increased as the distance from the second center hole 43 increases. The inclination angle of the rear taper hole 41 is slightly gentler than the inclination angle of the front taper hole 42, and the rear taper hole 41 is greatly expanded.

  Here, the first taper hole 41 of the second nozzle core 40, the first sleeve 51, and the front taper hole 32 of the first nozzle core 30 constitute the first mist generating chamber 15. Further, the front tapered hole 42 of the second nozzle core 40, the tapered hole 52A of the second sleeve 52 (corresponding to the “intermediate tapered hole” of the present invention), and the tapered hole 53A of the nozzle front end pipe 53 (of the present invention). The second mist generating chamber 17 is constituted by "corresponding to" terminal tapered hole "). The fluid passage cross-sectional area of the second center hole 43 provided in the second nozzle core 40 is smaller than that of the discharge guide portion 18 and larger than that of the first center hole 33 provided in the first nozzle core 30. Yes.

  As shown in FIG. 3, the second nozzle core 40 has a second liquid supply path 44 extending radially outward from the second center hole 43 and opened to the outer peripheral surface (the “core side sub-penetration” of the present invention). 1) corresponding to “hole” is formed. The second liquid supply path 44 is constituted by, for example, a circular hole having a smaller diameter than the second center hole 43, and the opening end on the outer peripheral surface of the second nozzle core 40 is expanded in a tapered shape (see FIG. 6). As shown in FIG. 3, the second liquid supply path 44 is disposed coaxially with and communicates with one of the two second liquid supply ports 28, 28 formed through the nozzle body 21. The “second sub flow path” is configured. That is, the second liquid is supplied to the second center hole 43 through the second liquid supply port 28 and the second liquid supply path 44.

  Further, a rotation stopper recess 45 is formed at a position on the opposite side of the outer peripheral surface of the second nozzle core 40 from the opening end of the second liquid supply path 44. That is, when the second liquid supply path 44 is arranged coaxially with one second liquid supply port 28, the other second liquid supply port 28 and the rotation stopper recess 35 are arranged coaxially. A screw 60 is screwed into the female screw 28A of the other second liquid supply port 28, and a tip protrusion 61 provided on the screw 60 engages with the anti-rotation recess 45 so that the second nozzle core 40 is engaged. Is prevented from rotating with respect to the nozzle body 21. That is, when the second liquid supply path 44 and one second liquid supply port 28 are communicated with each other, the other second liquid supply port 28 not communicated with the second liquid supply path 44 is connected by the screw 60. The second nozzle core 40 can be prevented from rotating by using the screw 60 while closing.

  As shown in FIG. 6 (A), a pair of outer peripheral surfaces of the second nozzle core 40 are disposed on both sides in the axial direction across the opening end of the second liquid supply passage 44 and the rotation stopper recess 45. O-ring grooves 47 and 47 are formed in depressions, and O-rings 29 are respectively attached. These O-rings 29 seal between the second nozzle core 40 and the inner peripheral surface of the nozzle body 21 (see FIG. 3). In the present embodiment, an O-ring is not provided between the first nozzle core 30 and the nozzle body 21, but a sealing member such as an O-ring may be provided as necessary.

  As shown in FIG. 6 (B), a plurality of (for example, five in this embodiment) side holes 46 pass through the second nozzle core 40 at a lateral position away from the second center hole 43. Is formed. Each side hole 46 is provided independently without communicating with the second center hole 43. Specifically, as shown in FIG. 6A, each side hole 46 opens to the inner surface of the rear taper hole 41 and the inner surface of the front taper hole 42 in the second throat portion 16, and the rear taper. As it goes from the hole 41 toward the front tapered hole 42, the second center hole 43 (in detail, its central axis) is inclined. Further, as shown in FIG. 6B, the plurality of side holes 46 are arranged in an annular shape so as to surround the second center hole 43. Further, the fluid passage sectional area per one side hole 46 is smaller than the fluid passage sectional area of the second center hole 43. Specifically, for example, the ratio of the diameter of the second center hole 43 to the diameter of the side hole 46 is about 3: 1.

  The side holes 46 are arranged at rotationally symmetric positions (symmetry 5 times in this embodiment) with the center axis of the second center hole 43 as the center of symmetry, and the focal position at which the center axis of each side hole 46 intersects is The second center hole 43 is configured to be coaxial with the central axis.

  The configuration of the two-component mixed mist generating nozzle 10 of the present embodiment is as described above. Next, the function and effect of the two-component mixed mist generating nozzle 10 according to the present invention will be described. In the following description, the case where the lubricating oil for metal cutting is supplied as the “first liquid” according to the present invention and the water is supplied as the “second liquid” according to the present invention will be described as an example. Do.

  Lubricating oil is supplied from the first liquid supply port 27 through the first liquid supply path 34 into the first center hole 33 while the compressed gas is flowing in the mist generation flow path 11, and the second supply Water is supplied from the liquid port 28 into the second center hole 43 through the second liquid supply path 44. Thereby, the lubricating oil is supplied to the first mist generating chamber 15 together with the compressed gas, and the mist of the lubricating oil is generated in the first mist generating chamber 15.

  Here, the compressed gas supplied from the gas supply port 12 is not only from the first center hole 33 of the first nozzle core 30 but also from the side holes 36 </ b> A and 36 </ b> B around the first center hole 33. It is injected into the mist generating chamber 15. Since the compressed gas injected from the side holes 36A and 36B collides with the lubricating oil mist passage region in the first mist generating chamber 15, the efficiency of the lubricating oil mist can be increased. In other words, the compressed gas can collide with the relatively large oil particles in the first mist generating chamber 15 which are not misted from the side holes 36A and 36B to make the mist fine. Further, since the plurality of side holes 36A and 36B are provided so that the compressed gas collides from a plurality of directions, the efficiency of the mist formation of the lubricating oil can be further increased. Further, since the first side hole 36A group and the second side hole 36B group having different inclination angles with respect to the central axis of the first center hole 33 are provided, the compressed gas can be sprayed over a wide range of the lubricating oil mist passage region. Further, the efficiency of misting the lubricating oil can be further increased. In this embodiment, the lubricating oil supplied from the first liquid supply port 27 can be almost completely misted.

  Here, if the inclination angles of the side holes 36A and 36B are set so that the compressed gas that has passed through the side holes 36A and 36B collides with the oil particles as close to the discharge port of the first center hole 33 as possible. Further, refinement of oil particles can be further promoted. The reason is that the compressed gas can collide with the oil particles before the oil particles discharged from the first center hole 33 diffuse widely in the first mist generating chamber 15. This is because can be collided with high probability. Moreover, it is because it can be made to collide with an oil particle before the speed of compressed gas falls.

  The compressed gas containing the mist of the lubricating oil is fed from the first mist generating chamber 15 to the second center hole 43. As a result, water is supplied to the second mist generating chamber 17 together with the compressed gas containing the lubricating oil mist, and the water is converted into a mist, and at the same time, the oil / water mist composed of a water particle group covered with an oil film of the lubricating oil ( Corresponding to the “two-component mixed mist” of the present invention). Here, the fluid that has passed through the second center hole 43 and has flowed into the second mist generating chamber 17 is water mist particles in which no oil film is formed or water in which only a part of the oil film is formed. Contains mist particles.

  On the other hand, the fluid in the first mist generating chamber 15 (compressed gas containing mist of lubricating oil) is not only from the second center hole 43 but also from the side hole 46 around the first center hole 43 to the second. Therefore, the generation of the oil / water mist is promoted as compared with the case where only the second center hole 43 is provided. Specifically, a lubricant mist curtain is formed in the second mist generating chamber 17 by injecting a lubricant mist from the side hole 46, and an oil film is completely formed on the lubricant mist curtain. By passing water mist particles that are not or only partially formed with an oil film, it is possible to cover the entire surface of the water mist particles with an oil film (generate oil-water mist particles).

  The oil / water mist generated in this way is increased in flow rate by the discharge guide portion 18 and discharged from the mist discharge port 13. In addition, this oil-water mist is dropped and used for the tool and workpiece | work of a processing machine (for example, a hobbing machine, a lathe, an end mill processing machine, etc.). And, like the two-component mixed mist generating nozzle disclosed in the above-mentioned Japanese Patent No. 3574023, there are effects such as suppressing adverse effects of the lubricating oil on the environment.

  As described above, according to the present embodiment, the first nozzle core 30 is provided with the side holes 36A and 36B, whereby the efficiency of mist formation of the first liquid can be increased. A plurality of side holes 36A and 36B are arranged in a ring so as to surround the first center hole 33, and the first side hole 36A group and the first side hole 36A group having different inclination angles with respect to the central axis of the first center hole 33 are arranged. Since the two side holes 36B are provided, the first liquid can be almost completely misted.

  Further, by providing the side hole 46 in the second nozzle core 40, it is possible to increase the efficiency of mist formation of the second liquid, and to promote the coalescence of the first liquid and the second liquid. The production rate of the liquid mixed mist can be increased. In addition, since the side holes 46 are arranged in a ring shape so as to surround the second center hole 43, the efficiency of mist formation of the second liquid and the generation rate of the two-liquid mixed mist can be further increased.

  Further, since the downstream openings of the side holes 36A, 36B, 46 formed in the first and second nozzle cores 30, 40 are respectively formed on the inner surfaces of the front tapered holes 32, 42, the center hole 33 is provided. , 43 can efficiently collide with the fluid (compressed gas or compressed gas containing the mist of the first liquid) that has passed through the side holes 36A, 36B, 46 on the mist generated on the downstream side.

  Further, since the inner surfaces of the first mist generating chamber 15, the second mist generating chamber 17, and the discharge guide portion 18 are made of a material having liquid repellency, the liquid adhering to the inner surfaces can be easily discharged. Can do. Specifically, for example, the liquid attached to the inner surface can be easily removed by directing the mist outlet 13 downward or by blowing air (flowing only compressed gas without supplying the first and second liquids). It can be discharged from the mist discharge port 13. Thereby, the inside of the mist production | generation flow path 11 can be kept clean, and the effort of maintenance, such as decomposition | disassembly washing | cleaning, can be reduced.

  Further, the two-component mixed mist generating nozzle 10 has a first nozzle core 30, a first sleeve 51, a second nozzle core 40, and a second sleeve from the front end portion of the nozzle body 21 to the component housing hole 20 </ b> A of the nozzle body 21. 52 is inserted and assembled in the order of 52, and finally, the nozzle head 23 equipped with the nozzle front end pipe 53 is screwed into the nozzle body 21 to complete. That is, the first nozzle core 30, the first sleeve 51, the second nozzle core 40, the second sleeve 52, and the nozzle head 23 can all be assembled from the same direction (the front end side of the nozzle body 21). Improved workability.

  Further, the first and second center holes 33 and 43, the side holes 36 </ b> A, 36 </ b> B and 46, and the first and second liquid supply paths 34 and 44 are formed in the nozzle cores 30 and 40 which are separate parts from the nozzle body 20. Therefore, the degree of freedom in design and workability of the center holes 33, 43, the side holes 36A, 36B, 46, and the liquid supply paths 34, 44 are improved. In addition, since the first and second sleeves 51 and 52 and the nozzle front end pipe 53 are configured as separate parts from the nozzle body 21, the design of the first mist generating chamber 15 and the second mist generating chamber 17 is not limited. The degree of freedom and workability are improved.

  Moreover, in the conventional two-component mixed mist generating nozzle disclosed in Japanese Patent No. 3574023, the first liquid that has not been misted is excluded from the first mist generating chamber, and the first and second liquids In order to promote the coalescence of the mist particles, the first liquid remaining in the first mist generating chamber is directly jetted to the second mist generating chamber by bypassing the second nozzle core. However, in the above conventional structure, a bypass flow path that bypasses the second nozzle core needs to be provided in the nozzle body separately from the main flow path (the mist generation flow path 11 of the present embodiment). There was a problem of increasing complexity. On the other hand, according to the present embodiment, the first nozzle core 30 is provided with the side holes 36A and 36B, so that the efficiency of mist formation of the first liquid is increased and the first mist generating chamber 15 has the first. This makes it difficult for the liquid to remain, and by providing the side holes 46 in the second nozzle core 40, it is possible to promote the coalescence of the mist particles of the first and second liquids. Thus, it is possible to reduce the size and the structure. As a result, the degree of freedom of the installation location is improved and the manufacturing cost can be suppressed.

[Second Embodiment]
This embodiment is shown in FIGS. 7 and 8, and inside the nozzle head 23, a nozzle front end pipe 54 shorter than the nozzle front end pipe 53 of the first embodiment and a branch outflow pipe 55 (of the present invention). Is different from the first embodiment in that the “branch outflow portion” is fitted. The other configuration is the same as that of the first embodiment, and a duplicate description is omitted.

  As shown in FIG. 7B, a nozzle front end pipe 54 is fitted to the rear end side of the annular step portion 23A in the component accommodation hole 20A of the nozzle head 23, and branched to the front end side of the annular step portion 23A. The outflow pipe 55 is fitted. The nozzle front end pipe 54 is approximately half the length of the nozzle front end pipe 53 of the first embodiment, and the outer edge of the front end portion abuts against the annular step portion 23A.

  The through-hole formed in the axial center portion of the nozzle front end pipe 54 is a tapered hole 54A whose diameter is reduced as the second sleeve 52 side (upstream side) moves away from the second sleeve 52. The tapered hole A cylindrical hole 54B having a constant inner diameter is formed between the small diameter end portion of 54A and the terminal opening opened to the front end face of the nozzle front end pipe 54. In the mist generation flow path 11, a portion from the gas supply port 12 to the terminal opening of the nozzle front end pipe 54 extends linearly to constitute the “main flow path” of the present invention. The end opening of the nozzle front end pipe 54 corresponds to the “outlet of the main channel” in the present invention.

  As shown in FIG. 6B, the branch outflow pipe 55 has a rear end face that abuts against a front end face of the nozzle front end pipe 54 and a front end face that faces the mist discharge port 13. In the center of the rear end surface of the branch outflow pipe 55, a tapered recess 55A that is recessed in a mortar shape is formed, and the tapered recess 55A faces the terminal opening (cylindrical hole 54B) of the nozzle front end pipe 54.

  In the central part of the branch outflow pipe 55, a main channel 56 constituting the terminal portion of the mist generation channel 11 is formed to penetrate. The basic flow path 56 has a structure in which the base ends of a plurality (three in the present embodiment) of the branch flow path pipes 56A are grouped together. Each of the plurality of branch flow pipes 56 </ b> A extends so as to be separated from the central axis of the branch outflow pipe 55 as it goes from the rear end surface to the front end surface of the branch outflow pipe 55. They are arranged at rotationally symmetric positions (three-fold symmetry in this embodiment).

  The start opening of each branch passage pipe 56A is formed in the inner surface of the tapered recess 55A, and the through holes (taper hole 54A and cylindrical hole 54B) of the branch outlet pipe 55 and each branch passage pipe 56A communicate with each other. ing. Each branch passage pipe 56A has a stepped diameter before the end opening opened to the front end face of the branch outflow pipe 55, and the center axis of the branch outflow pipe 55 extends from the enlarged diameter portion to the end opening. It is parallel to. The fluid passage cross-sectional areas of the plurality of branch passage pipes 56A are all equal, and the fluid passage cross-sectional area per branch passage pipe 56A is smaller than the through hole (cylindrical hole 54B) of the nozzle front end pipe 54. ing.

  The two-component mixed mist generated in the second mist generating chamber 17 flows into the main flow path 56 of the branch outflow pipe 55 through the through holes (tapered holes 54A and cylindrical holes 54B) of the nozzle front end pipe 54, It is possible to inject from the tip of each branch channel pipe 56A. According to the present embodiment, the same effect as that of the first embodiment can be obtained, and the two-component mixed mist can be sprayed in a wider range.

  A plurality of types of branch outflow pipes 55 having different specifications (number, arrangement, dimensions) of the branch flow channel pipe 56A are provided, and the branch outflow pipe 55 is selected according to the type of liquid and the spray target object of the two-component mixed mist. It is good also as a structure which can change the kind of. Further, the branch outflow pipe 55 and the nozzle front end pipe 54 of the present embodiment may be exchangeable with the nozzle front end pipe 53 of the first embodiment.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the first and second embodiments, the two nozzle cores 30 and 40 are provided in the mist generation flow path 11, but another nozzle core having a center hole upstream from the first nozzle core 30 ( (Reduced-diameter wall) may be provided, or another nozzle core (reduced-diameter wall) having a center hole on the downstream side of the second nozzle core 40 may be provided. Further, these other nozzle cores (reduced diameter walls) may have side holes similar to those of the first nozzle core 30 or the second nozzle core 40.

  (2) In the first and second embodiments, the side holes are provided in the two nozzle cores 30 and 40 provided in the mist generation flow path 11, but the side holes are provided only in one of the nozzle cores. Also good. Moreover, although the side hole was provided with two or more with respect to one nozzle core, you may make one side hole.

  (3) In the first and second embodiments, the first nozzle core 30 is provided with a plurality of types of side holes 36A, 36B having different inclination angles with respect to the central axis of the first center hole 33. The nozzle core 40 may be provided with a plurality of types of side holes having different inclination angles with respect to the central axis of the second center hole 43, and both the first nozzle core 30 and the second nozzle core 40 may have a plurality of types having different inclination angles. Side holes may be provided.

  (4) In the first and second embodiments, the plurality of types of side holes 36A and 36B having different inclination angles with respect to the central axis of the first center hole 33 are provided. However, as shown in FIG. A first side hole 36A is provided at a position close to the first center hole 33, a second side hole 36B is provided at a position farther from the first center hole 33 than the first side hole 36A, and the first center hole 33 is provided. The inclination angle of the first side hole 36A relative to the central axis of the second side hole 36B may be the same as the inclination angle of the second side hole 36B. Further, the second nozzle core 40 may be provided with the same configuration as this.

  (5) In the said 1st and 2nd embodiment, the intersection of the central axis of side hole 36A, 36B, 46 and the central axis of center hole 33, 43 may mutually shift | deviate for every some side hole. Further, like the nozzle core (reduced diameter wall) 70 shown in FIG. 10, each of the plurality of side holes 76 is inclined so as to approach the center hole 73 from the upstream start end opening 76A toward the downstream end opening 76B. In addition, the start end opening 76A and the end opening 76B of the side hole 76 may be arranged at a position twisted in one direction around the center axis of the center hole 73.

  (6) In the first and second embodiments, oil (lubricating oil) and water are exemplified as an example of the first liquid and the second liquid. However, the present invention is not limited to these, and before mist formation Other liquids (for example, water and an organic solvent, oils having different specific gravities) that are separated even if mixed in advance may be used, or liquids (for example, two liquids) in which a chemical reaction proceeds when mixed in advance. Adhesive) or other two different liquids. In addition, it is not limited to supplying and using two different liquids, You may supply and use the same two liquids.

  (7) In the first and second embodiments, the first and second nozzle cores 30 and 40 are prevented from rotating by the screw 60. For example, the first and second nozzle cores 30 and 40 are prevented from being received in the component receiving holes. You may stop rotation by press-fitting into 20A.

  (8) In the first and second embodiments, the first and second nozzle cores 30 and 40 that are separate parts from the nozzle body 21 are provided as the first and second reduced diameter walls according to the present invention. However, the first and second reduced diameter walls may be formed integrally with the nozzle body 21.

  (9) In the first and second embodiments, each of the first liquid supply path 34 and the second liquid supply path 44 provided in the first and second nozzle cores 30 and 40 is one each. However, a plurality of first liquid supply paths 34 and a plurality of second liquid supply paths 44 may be provided. In that case, an annular flow path extending along the entire circumference of the outer peripheral surface of the nozzle cores 30 and 40 is formed, and a plurality of liquid supply paths 34 and 44 are communicated with the annular flow path, respectively. The liquid supplied from the liquid ports 27 and 28 may be supplied to the plurality of liquid supply paths 34 and 44 via the annular flow path.

  Here, when a plurality of liquid supply paths are formed in one nozzle core 30, 40, the nozzle cores 30, 40 may cause slight vibration in the nozzle body 21 unless liquid is supplied in a balanced manner from the respective liquid supply paths. There is. In contrast, in the first and second embodiments, since only one liquid supply path 34, 44 is provided in each of the first and second nozzle cores 30, 40, the nozzle cores 30, 40 are connected to the nozzle body 21. Can be stabilized within

  (10) In the first and second embodiments, the side holes 36A, 36B, 46 provided in the first and second nozzle cores 30, 40 have a circular cross section, but the side holes 36A, 36B, 46 are The cross section may be polygonal or may be slit. The center holes 33 and 43 may be polygonal in cross section.

  (11) In the first embodiment, the second sleeve 52 and the nozzle front end pipe 53 are provided on the downstream side of the second nozzle core 40. However, these are eliminated, and the front tapered hole 42 in the second nozzle core 40 is provided. And a mist discharge port 13 which is a terminal opening of the mist generation flow path 11 may be directly communicated. At this time, the front tapered hole 42 corresponds to a “second mist generating chamber” in the present invention. The first liquid mist particles that have passed through the side holes 46 of the second nozzle core 40 and the second liquid mist particles that have passed through the second center hole 43 are combined into the two-liquid mixed mist generating nozzle 10. You may comprise so that it may collide on the outer side and unite | combine.

  (12) In the first and second embodiments, the first spacer 51, the second spacer 52, and the nozzle front end pipe 53 are made of a water-repellent material. Alternatively, the entire inner surface may be coated with a water-repellent material.

  (13) In the first and second embodiments, the fluid passage cross-sectional areas of the side holes 36A, 36B, 46 are constant, but, for example, toward the downstream end of the side holes 36A, 36B, 46, The fluid passage cross-sectional area may be reduced.

  (14) In the first and second embodiments, the fluid passage cross-sectional area of the center holes 33 and 43 is constant between the both ends, but more than the front taper holes 32 and 42 and the rear taper holes 31 and 41. The fluid passage cross-sectional area may be narrowed toward the downstream end or the upstream end with a gentle inclination angle.

10 Two-component mixed mist generation nozzle 11 Mist generation flow path (main flow path)
12 Gas supply port (inlet)
13 Mist outlet (outlet)
DESCRIPTION OF SYMBOLS 15 1st mist production | generation chamber 17 2nd mist production | generation chamber 20A Component accommodation hole 21 Nozzle main body 27 1st liquid supply port (main body side sub through-hole)
27A Female screw 28 Second liquid supply port (main body side sub through hole)
28A Female screw 30 First nozzle core (first reduced diameter wall)
33 Center hole 34 1st liquid supply path (core side sub through hole)
36A First side hole (side hole)
36B Second side hole (side hole)
40 Second nozzle core (second reduced diameter wall)
41 Rear taper hole 42 Front taper hole 43 Center hole 44 Second liquid supply path (core side sub through hole)
46 Side hole 51 First sleeve 52 Second sleeve 52A Taper hole (intermediate taper hole)
53A Taper hole (Terminal taper hole)
55 Branch outflow pipe (branch outflow section)
56 Basic channel 56A Branch channel tube 60 Screw 70 Nozzle core 73 Center hole 76 Side hole

Claims (9)

A main flow path that extends in a straight line and feeds compressed gas from an inlet at one end to an outlet at the other end, and protrudes from the inner surface of the main flow path in two longitudinal directions in the main flow path The first and second reduced diameter walls having a center hole as a part of the main flow path at the center, and the first and second reduced diameter walls are relatively close to the inlet side of the first and second reduced diameter walls. A first sub-flow channel for communicating with the center hole of the first reduced diameter wall from the side and supplying a first liquid, and the second reduced diameter wall on the outlet side relatively. A second sub-flow path communicating with the center hole from the side and supplying a second liquid; and disposed between the first and second reduced diameter walls of the main flow path; A first mist generating chamber for mist-forming one liquid, and the opposite side of the first mist generating chamber across the second reduced diameter wall And a second mist generating chamber for misting the second liquid, and combining the mist particles of the second liquid with the mist particles of the first liquid to form a two-component mixed mist. In the two-component mixed mist generating nozzle to be generated,
Both the first and second or one of the diameter-reduced walls pass through the side position of the center hole, and incline so as to approach the center hole from the inlet side toward the outlet side, A two-component mixed mist generating nozzle comprising a side hole having a smaller fluid passage cross-sectional area than the center hole.   The two-component mixed mist generating nozzle according to claim 1, wherein the side holes are arranged in a ring shape so as to surround the center hole.   3. The two-liquid mixed mist generating nozzle according to claim 1, wherein a plurality of types of side holes having different inclination angles with respect to a central axis of the center hole are provided on a side of the common center hole. A rear taper hole that is gradually reduced in diameter toward the center hole is formed as a part of the main flow path on the upstream side of the center hole in the reduced diameter wall. On the downstream side of the center hole, a front taper hole gradually increasing in diameter as being away from the center hole is formed as a part of the main flow path,
The said side hole is penetratingly formed in the said reduced diameter wall so that between the inner surface of the said rear side taper hole and the inner surface of the said front side taper hole may be penetrated, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. The two-component mixed mist generating nozzle according to claim 1. The rear tapered hole and the front tapered hole are formed in the second reduced diameter wall,
The second mist generating chamber has an intermediate tapered hole which is connected to the downstream end portion of the front tapered hole formed in the second reduced diameter wall and is reduced in diameter toward the downstream side. And a terminal tapered hole connected to the downstream end of the intermediate tapered hole and having a diameter reduced toward the downstream side at a steep inclination angle than the intermediate tapered hole. Two-component mixed mist generating nozzle.   The two-component mixed mist generating nozzle according to any one of claims 1 to 5, wherein an inner surface of the main flow path is configured by a member having liquid repellency. The first nozzle core, the first sleeve, the second nozzle core, and the second sleeve are fitted in order in the component housing hole formed in the nozzle body and fixed in the axial direction.
The first and second sleeves constitute inner surfaces of the first and second mist generating chambers, and the first and second nozzle cores constitute the first and second reduced diameter walls,
Only one of the first and second sub-channels communicating with the center hole of the first and second nozzle cores is provided in each nozzle core, and penetrates from the outer surface of the nozzle core into the center hole. A core-side sub through hole and a main body side sub through hole penetrating from the outer surface of the nozzle body into the component housing hole and coaxially with the core side sub through hole. Item 7. The two-component mixed mist generating nozzle according to any one of items 1 to 6. A plurality of the main body side sub through holes are provided around each nozzle core, and a female screw is formed on the inner surface of each of the main body side sub through holes,
In a state where any one of the main body side sub through holes is arranged coaxially with the core side sub through hole, the screw threaded with the female screw in the other main body side sub through hole rotates around the nozzle core. The two-component mixed mist generating nozzle according to claim 7, wherein the nozzle is capable of being stopped.   A branch outflow portion that forms a basic flow path by bringing together base ends of a plurality of branch flow path pipes, wherein the basic flow path is connected to the outlet of the main flow path, and each of the branch flow path pipes The two-component mixed mist generating nozzle according to any one of claims 1 to 8, wherein the two-component mixed mist can be discharged from a front end portion of the two-component mixed mist.

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