JP2014054594A - Slit nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slit nozzle capable of spraying a liquid uniformly into a wide range.SOLUTION: A slit nozzle 1 of the invention is configured by putting a stacked body 20 constituted of a first intermediate member 2 and a second intermediate member 3 between a first member 4 and a second member 5 and integrating the stacked body 20 with the first and second members 4 and 5. On a tip end 11, a liquid channel 12 is formed in a gap between the first intermediate member 2 and the second intermediate member 3, a first gas channel 13 is formed in a gap between the first member 4 and the first intermediate member 2, and a second gas channel 14 is formed in a gap between the second member 5 and the second intermediate member 3. In a cross-sectional view of the tip end 11, an extension direction of the first gas channel 13 and an extension direction of the second gas channel 14 cross an extension direction of the liquid channel 12 at sharp angles. In a front view of the tip end 11, a port mouth 12e extends in Y direction, port mouths 13e of the first gas channel and port mouths 14e of the second gas channel are plurally disposed at intervals along both sides of the port mouth 12e, and port mouths 13e and port mouths 14e are alternately disposed.

Description

  The present invention relates to a slit nozzle for spraying a fluid.

  Conventionally, various slit nozzles have been proposed in order to uniformly spray detergents, chemicals, and the like on products. For example, Patent Document 1 describes a slit nozzle in which a long nozzle hole and a liquid nozzle are formed in a nozzle body, and a notch is provided at the tip of a plate that forms the liquid nozzle. In Patent Document 2, a gas jet port and a liquid jet port are formed in a laminate of three plate-like bodies, and the tip of the central plate-like body is extended forward from the jet port. A slit nozzle having an inclined tip is described.

  However, since both the slit nozzle described in Patent Document 1 and the slit nozzle described in Patent Document 2 have only one air outlet and one liquid outlet, the air jet is applied to the liquid ejected from the liquid outlet. There was a limit to spraying uniformly over a wide area by colliding with the air ejected from the outlet.

  For example, Patent Document 3 describes a spray system in which an injection port for ejecting one liquid is provided between gaps for ejecting two gases. In this way, the ejection port for ejecting liquid is sandwiched between two gaps for ejecting gas, and the extending direction of the two gaps for ejecting gas intersects at an acute angle with respect to the direction in which the ejection port for ejecting liquid extends. Therefore, compared with the slit nozzles described in Patent Documents 1 and 2, the liquid can be sprayed uniformly.

JP 48-29009 A Japanese Patent Laid-Open No. 2003-1151 Special table 2009-517214

  However, Patent Document 3 does not describe how to arrange the two gaps for ejecting the gas to the ejection port for ejecting the liquid, but describes spraying the liquid uniformly over a wide range. Absent.

  Therefore, the present invention relates to a slit nozzle that can spray a liquid uniformly over a wide range.

  In the present invention, a laminated body composed of a pair of vertically long first intermediate member and second intermediate member is sandwiched between the first member on the first intermediate member side and the second member on the second intermediate member side and integrated. In the slit nozzle, a liquid flow path is formed in the gap between the first intermediate member and the second intermediate member at the tip of the slit nozzle, and the first member and the first intermediate member A first gas flow path is formed in a gap between the second member and the second intermediate member, and a second gas flow path is formed in the gap between the second member and the second intermediate member. The extending direction of the first gas channel and the extending direction of the second gas channel intersect each other at an acute angle with respect to the extending direction of the liquid channel, and the front end of the slit nozzle is viewed from the front. The jet outlet of the liquid channel extends in the longitudinal direction, along both sides of the jet outlet of the liquid channel. A plurality of outlets of the first gas channel and a plurality of outlets of the second gas channel are arranged at intervals in the longitudinal direction, and the outlet of the first gas channel and the second gas channel The nozzle is alternately provided with a slit nozzle.

  According to the slit nozzle of the present invention, the liquid can be sprayed uniformly over a wide range.

FIG. 1 is a diagram schematically showing how to assemble a slit nozzle according to an embodiment of the present invention. FIG. 2 is a plan view of the inner surface of the first intermediate member of the slit nozzle shown in FIG. FIG. 3 is a plan view of the inner surface of the second intermediate member of the slit nozzle shown in FIG. FIG. 4 is a plan view of the inner surface of the first member of the slit nozzle shown in FIG. FIG. 5 is a plan view of the inner surface of the second member of the slit nozzle shown in FIG. FIG. 6 is a cross-sectional view of a slit nozzle according to an embodiment of the present invention. 7 is a cross-sectional view of the tip of the slit nozzle shown in FIG. FIG. 8 is a plan view when the front end portion of the slit nozzle shown in FIG. 6 is viewed from the front. FIG. 9 is an explanatory view of the position adjusting means provided in the slit nozzle shown in FIG. FIG. 10 is a plan view when the front end portion of the slit nozzle is viewed from the front after the position is changed by the position adjusting means. FIG. 11 is a diagram for explaining a method for evaluating the uniformity of the sprayed liquid. FIG. 12 is a diagram illustrating a grid plate included in the measuring tool shown in FIG. FIG. 13 is a contour map showing the distribution of the liquid spray amount by the slit nozzle of the first embodiment. FIG. 14 is a contour map showing the distribution of the amount of liquid sprayed by the slit nozzle of Comparative Example 1. FIG. 15A is a line graph showing the relationship between the position of the wrinkles and the liquid collection amount in the cross section taken along the line AA ′ shown in FIG. 13 and the cross section taken along the line AA ′ shown in FIG. FIG. 15 is a line graph showing the relationship between the position of the ridge and the liquid collection amount in the cross section taken along the line BB ′ shown in FIG.

Hereinafter, the slit nozzle of the present invention will be described based on its preferred embodiments with reference to FIGS.
As shown in FIG. 1, the slit nozzle 1 of the present embodiment includes a laminated body 20 composed of a pair of vertically long first intermediate member 2 and second intermediate member 3 and a first member 4 on the first intermediate member 2 side. It is integrated with the second member 5 on the second intermediate member 3 side. Specifically, the slit nozzle 1 is integrally formed by sandwiching the laminate 20 between the first member 4 from the first intermediate member 2 side and the second member 5 from the second intermediate member 3 side. More specifically, the slit nozzle 1 is formed by superimposing the first intermediate member 2, the second intermediate member 3, the first member 4, and the second member 5 that are four plate-like bodies. . The Y direction in the figure is the same as the longitudinal direction of the vertically long first intermediate member 2 and the second intermediate member 3, and the X direction in the figure is the same as the short direction perpendicular to the longitudinal direction (Y direction). Direction. The Z direction in the figure is the thickness direction.

  As shown in FIG. 2, the first intermediate member 2 has a rectangular shape that is long in the Y direction when viewed from the surface facing the second intermediate member 3, and has a distal end portion 21 as viewed in cross section in the Z direction. It is formed in the trapezoid shape which has. The distal end portion 21 has an inclined surface 22 that smoothly inclines from the surface side facing the first member 4 toward the surface side facing the second intermediate member 3. The angle θ1 (see FIG. 1) formed by the inclined surface 22 and the surface facing the second intermediate member 3 is 15 ° from the viewpoint of uniform spraying over a wide area, the strength of the nozzle tip, and adhesion of the spray liquid to the nozzle. It is above, Preferably it is 20 degrees or more, More preferably, it is 22.5 degrees or more. And it is 75 degrees or less, Preferably it is 60 degrees or less, More preferably, it is 45 degrees or less. More specifically, the angle is 15 ° to 75 °, preferably 20 ° to 60 °, and more preferably 22.5 ° to 45 °.

  In the slit nozzle 1, the first intermediate member 2 has a plane facing the second intermediate member 3 and a plane facing the first member 4, as shown in FIGS. 1 and 2. A plurality of through holes 23 penetrating in the thickness direction (Z direction) are formed along the outer periphery excluding the tip 21. A plurality of through holes 23 are formed at intervals in the longitudinal direction (Y direction) along the side on the non-tip end side along the longitudinal direction (Y direction), and both end portions in the longitudinal direction (Y direction) respectively. In addition, a plurality are formed at intervals in the X direction. In the slit nozzle 1, each through-hole 23 is formed in a circular flat shape that is long in the Y direction. Further, a bolt tightening hole 25 that does not penetrate is formed on the back side (the back side of the surface facing the second intermediate member 3) at a position substantially coincident with each raised portion 342 a of the second intermediate member 3 described later, The inner surface is threaded in a spiral. As shown in FIGS. 1 and 2, the first intermediate member 2 penetrates in the thickness direction (Z direction) at the center of the end portion on the non-tip end side along the longitudinal direction (Y direction). A circular liquid supply port 24 for supplying the liquid to be formed is formed.

  As shown in FIG. 3, the second intermediate member 3 has a rectangular shape that is long in the Y direction when viewed from the side facing the first intermediate member 2, and has a distal end portion 31 as viewed in cross section in the Z direction. It is formed in the trapezoid shape which has. In the slit nozzle 1, the outline of the outer shape of the second intermediate member 3 viewed in plan from the surface facing the first intermediate member 2 and the plan view from the surface of the first intermediate member 2 facing the second intermediate member 3. The contour of the contour is the same. The distal end portion 31 has an inclined surface 32 that smoothly inclines from the surface side facing the second member 5 toward the surface side facing the first intermediate member 2. The angle θ2 (see FIG. 1) formed by the inclined surface 32 and the surface facing the first intermediate member 2 is 15 ° from the viewpoint of uniform spraying over a wide range, the strength of the nozzle tip, and adhesion of the spray liquid to the nozzle. It is above, Preferably it is 20 degrees or more, More preferably, it is 22.5 degrees or more. And it is 75 degrees or less, Preferably it is 60 degrees or less, More preferably, it is 45 degrees or less. More specifically, the angle is 15 ° to 75 °, preferably 20 ° to 60 °, and more preferably 22.5 ° to 45 °. In the slit nozzle 1, the formed angle θ2 is formed to be the same as the formed angle θ1.

  In the slit nozzle 1, the second intermediate member 3 has a flat surface facing the second member 5, and the second intermediate member 3 extends from the central region of the surface facing the first intermediate member 2 to the tip 31. A recessed portion 34 that is recessed toward the member 5 is formed. Thus, the surface facing the first intermediate member 2 has the recess 34, and the region excluding the recess 34 is formed as a flat surface. As shown in FIGS. 1 and 3, the second intermediate member 3 is penetrated in the thickness direction (Z direction) along the outer periphery excluding the front end portion 31 as in the first intermediate member 2. A plurality of holes 33 are formed. A plurality of through holes 33 are formed at positions substantially coincident with the through holes 23 of the first intermediate member 2. The shape of each through-hole 33 is different from the shape of the through-hole 23 in the slit nozzle 1 and is formed in a perfect circle shape.

  As shown in FIGS. 1 and 3, the concave portion 34 of the second intermediate member 3 has a bottom depth that gradually increases from a position corresponding to the liquid supply port 24 of the first intermediate member 2 toward the distal end portion 31. The first deep bottom concave portion 341, the second deep bottom concave portion 342, and the third deep bottom concave portion 343 are continuously provided so as to be shallow, and the shallow concave portion 344 having a very shallow bottom is continuously provided. Have. The first deep bottom concave portion 341 is deepest in the concave portion 34 and is formed in a T shape in plan view from the surface facing the first intermediate member 2. The T-shaped horizontal bar portion 341 a extends in parallel with the longitudinal direction (Y direction), and the T-shaped vertical bar portion 341 b is located at a position corresponding to the liquid supply port 24 of the first intermediate member 2. Is formed. The second deep bottom recess 342 extends in parallel to the longitudinal direction (Y direction) when viewed from the surface facing the first intermediate member 2. The first deep bottom recess 341 has a smooth bottom surface. In the slit nozzle 1, the second deep bottom recess 342 is formed with a columnar raised portion 342 a that rises from the bottom surface toward the first intermediate member 2. A plurality of raised portions 342a are formed at intervals in the longitudinal direction (Y direction). Each raised portion 342a is raised from the bottom surface of the second deep bottom concave portion 342 to a height that coincides with the height of the second intermediate member 3 excluding the concave portion 34. A bolt tightening hole 35 that does not penetrate from the back side (the surface facing the second member 5) is formed inside each raised portion 342a, and the inner surface is threaded in a spiral manner. The third deep bottom recess 343 extends in parallel to the longitudinal direction (Y direction) in a plan view from the surface facing the first intermediate member 2, and includes the first deep bottom recess 341 and the second deep bottom. It is formed shallower than the depth of the recess 342. The third deep bottom recess 343 has a smooth bottom surface.

  As shown in FIGS. 1 and 3, the shallow concave portion 344 of the second intermediate member 3 extends in parallel with the longitudinal direction (Y direction) when viewed from the surface facing the first intermediate member 2. It is the shallowest of the recesses 34. As shown in FIGS. 1 and 6, the shallow bottom recess 344 is formed in a part of the tip 31. The shallow bottom recess 344 has a smooth bottom surface.

  As shown in FIG. 6, the slit nozzle 1 has a liquid flow path 12 formed in the gap between the first intermediate member 2 and the second intermediate member 3 at the tip portion 11. More specifically, the laminated body 20 in which the first intermediate member 2 and the second intermediate member 3 are superposed on each other includes a plane facing the second intermediate member 3 in the first intermediate member 2, and the second intermediate member 3. The liquid reservoir 6 is formed by combining the first deep bottom recess 341, the second deep bottom recess 342, and the third deep bottom recess 343. A slit-like liquid flow path formed by combining the flat surface of the first intermediate member 2 facing the second intermediate member 3 and the shallow concave portion 344 of the second intermediate member 3 at the tip of the stacked body 20. 12 is formed. As shown in FIG. 6, the liquid reservoir 6 is formed in communication with the liquid supply port 24 of the first intermediate member 2, and the liquid flow path 12 is formed in communication with the liquid reservoir 6. As shown in FIG. 6, the liquid supply port 24 of the first intermediate member 2 communicates with a liquid introduction port 45 of the first member 4 to be described later via a liquid supply path 46.

  As shown in FIG. 4, the first member 4 has a rectangular shape that is long in the Y direction when viewed from the surface facing the first intermediate member 2, and is a cross-sectional view in the Z direction. The tip portion (tip portion 21 of the first intermediate member 2) is covered, and a sharp portion 41 that is sharp toward the liquid flow path 12 is provided. The sharpened portion 41 has an inclined surface 42 that uniformly inclines corresponding to the inclined surface 22 of the distal end portion 21 of the first intermediate member 2. The angle θ3 (see FIG. 1) formed by the inclined surface 42 and the flat surface portion 444 is 105 ° or more, preferably 120 ° or more, from the viewpoint of uniform spraying over a wide range, the strength of the nozzle tip, and the spray liquid adhesion to the nozzle More preferably, it is 135 ° or more. And it is 165 degrees or less, Preferably it is 160 degrees or less, More preferably, it is 157.5 degrees or less. More specifically, it is 105 ° to 165 °, preferably 120 ° to 160 °, more preferably 135 ° to 157.5 °. In the slit nozzle 1, the inclination angle θ3 (see FIG. 1) is formed to be the same as the angle obtained by subtracting the angle θ1 (see FIG. 1) formed by the first intermediate member 2 from 180 °.

  In the slit nozzle 1, the first member 4 has an outer surface (a surface that is not opposed to the first intermediate member 2) formed in a flat surface, and in the central region of the surface that faces the first intermediate member 2, on the outer surface side. A recessed portion 44 is formed. That is, the surface facing the first intermediate member 2 has a recess 44, and a region excluding the recess 44 is formed as a flat surface. As shown in FIGS. 1 and 4, the first member 4 is a through hole for bolt tightening that penetrates in the thickness direction (Z direction) along the outer periphery excluding the sharp portion 41, as in the first intermediate member 2. A plurality of 43 are formed. A plurality of through holes 43 are formed at positions corresponding to the through holes 23 of the first intermediate member 2. The shape of each through-hole 43 is formed in a circular flat shape that is long in the Y direction in the slit nozzle 1, similarly to the shape of the through-hole 23.

  As shown in FIG. 1, the first member 4 has a circular liquid introduction port 45 formed on the back surface (a surface opposite to the sharpened portion 41 side), and a liquid supply path communicating with the liquid introduction port 45. As shown in FIG. 6, 46 is bent into an inverted L shape and is formed so as to penetrate through the surface facing the first intermediate member 2 as shown in FIG. 4. The liquid supply path 46 communicates with the liquid supply port 24 of the first intermediate member 2. As shown in FIG. 4, the outlet of the liquid supply passage 46 formed on the surface facing the first intermediate member 2 is located at the center of the side portion on the non-sharp side along the longitudinal direction (Y direction). Is formed.

  As shown in FIGS. 1 and 4, the concave portion 44 of the first member 4 includes a first concave portion 441 having a deepest concave portion from the position corresponding to the outlet of the liquid supply path 46 toward the sharpened portion 41, A second recess 442 having the shallowest recess and a third recess 443 having a deep recess are continuously provided. The bottom surface of the first recess 441 is formed smoothly, and extends in parallel with the longitudinal direction (Y direction) when seen in a plan view from the side facing the first intermediate member 2. On the bottom surface of the first recess 441, as shown in FIG. 4, a circular gas penetrating the outer surface (a surface not facing the first intermediate member 2) in a portion located in the center in the longitudinal direction (Y direction). An introduction port 47 is formed. Further, the second recess 442 extends in parallel to the longitudinal direction (Y direction) when seen in a plan view from the side facing the first intermediate member 2. A columnar raised portion 442 a that rises from the bottom surface of the second recess 442 toward the first intermediate member 2 is formed. A plurality of raised portions 442a are formed at intervals in the longitudinal direction (Y direction). Each raised portion 442 a is raised from the bottom surface of the second recess 442 to a height that matches the height of the flat portion 444. In the slit nozzle 1, a plurality of bolt through holes 48 penetrating the outer surface (surface not facing the first intermediate member 2) are formed in each raised portion 442 a. The bolt through hole 48 is formed at a position substantially coincident with the bolt fastening hole 25 of the first intermediate member 2. The third recess 443 extends in parallel to the longitudinal direction (Y direction) in plan view from the surface facing the first intermediate member 2 and is formed shallower than the depth of the first recess 441. Has been. The bottom surface of the third recess 443 is formed smoothly.

  On the inclined surface 42 of the sharp part 41 of the first member 4, a groove part 421 parallel to the X direction is formed from the concave part 44 to the tip of the sharp part 41 as shown in FIG. 4. A plurality of groove portions 421 are formed at intervals in the longitudinal direction (Y direction).

  As shown in FIG. 5, the second member 5 is a rectangular shape that is long in the Y direction in a plan view from the side facing the second intermediate member 3, and is a cross-sectional view in the Z direction. The tip portion (tip portion 31 of the second intermediate member 3) is covered, and a sharp portion 51 that is sharp toward the liquid flow path 12 is provided. In the slit nozzle 1, the outline of the second member 5 in plan view from the surface facing the second intermediate member 3 and the outer shape of the first member 4 in plan view from the surface facing the first intermediate member 2. Is consistent with the outline. The sharpened portion 51 has an inclined surface 52 that uniformly inclines corresponding to the inclined surface 32 of the distal end portion 31 of the second intermediate member 3. The angle θ4 (see FIG. 1) formed by the inclined surface 52 and the flat surface portion 544 is 105 ° or more, preferably 120 ° or more, from the viewpoint of uniform spraying over a wide range, the strength of the nozzle tip, and adhesion of the spray liquid to the nozzle. More preferably, it is 135 ° or more. And it is 165 degrees or less, Preferably it is 160 degrees or less, More preferably, it is 157.5 degrees or less. More specifically, it is 105 ° to 165 °, preferably 120 ° to 160 °, more preferably 135 ° to 157.5 °. In the slit nozzle 1, the inclination angle θ4 (see FIG. 1) is formed to be the same as the angle obtained by subtracting the angle θ2 (see FIG. 1) formed by the second intermediate member 3 from 180 °.

  In the slit nozzle 1, the second member 5 has an outer surface (a surface that is not opposed to the second intermediate member 3) formed in a flat surface, and in the central region of the surface that faces the second intermediate member 3, on the outer surface side. A recessed portion 54 is formed. That is, the surface facing the second intermediate member 3 has a recess 54, and a region excluding the recess 54 is formed as a flat surface. As in the second intermediate member 3, the second member 5 is a bolt-tightening through-hole that penetrates in the thickness direction (Z direction) along the outer periphery excluding the sharp portion 51, as shown in FIGS. 1 and 5. A plurality of 53 are formed. A plurality of through holes 53 are formed at positions corresponding to the through holes 33 of the second intermediate member 3. The shape of each through-hole 53 is formed in a perfect circle shape in the slit nozzle 1 like the shape of the through-hole 33.

  As shown in FIGS. 1 and 5, the concave portion 54 of the second member 5 has a first concave portion 541 having the deepest concave portion and a second concave portion 542 having the shallowest concave portion toward the sharpened portion 51. And a third recess 543 having a deep recess is continuously provided. As shown in FIG. 6, the first recess 541, the second recess 542, and the third recess 543 of the second member 5 are respectively the first recess 441, the second recess 442, and the third recess 443 of the first member 4. It is provided corresponding to the formation position. The bottom surface of the first recess 541 is formed smoothly, and extends in parallel to the longitudinal direction (Y direction) when seen in a plan view from the side facing the second intermediate member 3. On the bottom surface of the first recess 541, as shown in FIG. 5, a circular gas penetrating the outer surface (a surface not facing the second intermediate member 3) in a portion located in the center of the longitudinal direction (Y direction). An introduction port 57 is formed. Further, the bottom surface of the second recess 542 is formed smoothly, and extends in parallel with the longitudinal direction (Y direction) when seen in a plan view from the surface facing the second intermediate member 3. A columnar raised portion 542a that protrudes from the bottom surface toward the second intermediate member 3 is formed. A plurality of raised portions 542a are formed at intervals in the longitudinal direction (Y direction). Each raised portion 542 a is raised from the bottom surface of the second recess 542 to a height that matches the height of the flat portion 544. In the slit nozzle 1, each raised portion 542 a is formed with a plurality of bolt through holes 58 penetrating the outer surface (surface not facing the second intermediate member 3) on the bottom surface. The bolt through hole 58 is formed at a position substantially coincident with the bolt fastening hole 35 of the second intermediate member 3. The third recess 543 extends in parallel with the longitudinal direction (Y direction) in a plan view from the side facing the second intermediate member 3 and is shallower than the depth of the first recess 541. Has been. The bottom surface of the third recess 543 is formed smoothly.

  As shown in FIG. 5, a groove 521 parallel to the X direction is formed on the inclined surface 52 of the sharp portion 51 of the second member 5 from the concave portion 54 to the tip of the sharp portion 51. A plurality of groove portions 521 are formed at intervals in the longitudinal direction (Y direction).

  As described above, the slit nozzle 1 has the liquid flow path 12 formed in the gap between the first intermediate member 2 and the second intermediate member 3 at the tip portion 11, and as shown in FIG. The first gas flow path 13 is formed in the gap between the first member 4 and the first intermediate member 2, and the second gas flow path 14 is formed in the gap between the second member 5 and the second intermediate member 3. . Specifically, as shown in FIG. 1, the slit nozzle 1 overlaps the first member 4 and the first intermediate member 2, and overlaps the second member 5 and the second intermediate member 3. The bolts are overlapped with each other, and bolts (not shown) are passed through the plurality of through holes 43, 23, 33, 53, and bolted with the bolts (not shown) and nuts (not shown). In the slit nozzle 1, the plane facing the first member 4 in the first intermediate member 2 and the first concave portion 441, the second concave portion 442, and the third concave portion 443 of the first member 4 are combined, and the upstream side The first gas reservoir 71, the gas flow path 72, and the second gas reservoir 73 are formed from the tip toward the tip. The slit nozzle 1 is combined with the inclined surface 22 of the distal end portion 21 of the first intermediate member 2 and the plurality of groove portions 421 of the inclined surface 42 of the sharpened portion 41 of the first member 4 in the slit shape. A plurality of first gas flow paths 13 are formed. As shown in FIG. 6, the first gas reservoir 71 is formed to communicate with the gas inlet 47 of the first member 4, and the second gas reservoir 73 includes the second gas reservoir 73 and the first gas. The first gas reservoir 71 communicates with the first gas reservoir 71 through a gas channel 72 narrower than the interval between the reservoirs 71, and the plurality of first gas channels 13 are formed to communicate with the second gas reservoir 73. .

  Further, as shown in FIG. 1, the slit nozzle 1 formed integrally by bolting with a bolt (not shown) and a nut (not shown) is opposed to the second member 5 in the second intermediate member 3. The first concave portion 541, the second concave portion 542, and the third concave portion 543 of the second member 5 are combined with each other, and the first gas reservoir 81 and the gas flow path 82 are directed from the upstream side toward the tip portion. And the 2nd gas reservoir 83 comes to be formed. The slit nozzle 1 is combined with the inclined surface 32 of the distal end portion 31 of the second intermediate member 3 and the plurality of groove portions 521 of the inclined surface 52 of the sharpened portion 51 of the second member 5 at the distal end portion of the slit nozzle 1. A plurality of second gas flow paths 14 are formed. As shown in FIG. 6, the first gas reservoir 81 is formed to communicate with the gas inlet 57 of the second member 5, and the second gas reservoir 83 includes the second gas reservoir 83 and the first gas. The first gas reservoir 81 communicates with the first gas reservoir 81 via a gas channel 82 narrower than the interval between the reservoirs 81, and the plurality of second gas channels 14 are formed to communicate with the second gas reservoir 83. . The first gas reservoir 81, the gas flow path 82 and the second gas reservoir 83 formed on the second member 5 side, the first gas reservoir 71, the gas flow path 72 formed on the first member 4 side, and As shown in FIG. 6, each of the second gas reservoirs 73 is formed symmetrically with respect to an imaginary line IL extending in the extending direction of the liquid flow path 12 at the tip of the slit nozzle 1.

  The slit nozzle 1 configured as described above will be described in detail. As shown in FIG. 7, the first gas flow in the extending direction of the liquid flow path 12 is shown in a sectional view of the tip portion 11 of the slit nozzle 1. The extending direction of the channel 13 and the extending direction of the second gas channel 14 intersect each other at an acute angle. Specifically, since the first intermediate member 2 is formed at an angle θ1 formed by the distal end portion 21, as shown in FIG. 7, the extending direction of the liquid flow path 12 and the extending of the first gas flow path 13 are provided. The crossing angle with the direction is θ1, so that the liquid flow and the gas flow are merged, and is formed at an angle θ2 formed by the distal end portion 31 of the second intermediate member 3. The crossing angle between the extending direction and the extending direction of the second gas channel 14 is θ2, so that the liquid flow and the gas flow are merged.

  Further, as shown in FIG. 8, when the front end portion 11 of the slit nozzle 1 is viewed from the front, the ejection port 12 e of the liquid channel 12 extends in the longitudinal direction (Y direction), and the ejection port of the liquid channel 12 A plurality of jet outlets 13e of the first gas channel 13 and jet nozzles 14e of the second gas channel 14 are arranged along the both sides of the first gas channel 13 at intervals in the longitudinal direction (Y direction). The outlet 13e of the flow path 13 and the outlet 14e of the second gas flow path 14 are alternately arranged.

  In the slit nozzle 1, the ejection port 13 e of each first gas channel 13 is formed in a rectangular shape that is long in the longitudinal direction (Y direction), and the ejection port 14 e of each second gas channel 14 is also elongated in the same manner. It is formed in a rectangular shape that is long in the direction (Y direction). And the length of the longitudinal direction (Y direction) of the jet nozzle 13e of each 1st gas flow path 13 and the length of the longitudinal direction (Y direction) of the jet nozzle 14e of each 2nd gas flow path 14 are the same. The length in the Y direction of the outlet 13e of each first gas channel 13 (the outlet 14e of each second gas channel 14) is 0.1 mm or more, preferably 0.5 mm or more, more preferably 0.8 mm or more. It is. And it is 2 mm or less, Preferably it is 1.5 mm or less, More preferably, it is 1.2 mm or less. More specifically, it is 0.1 mm or more and 2 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.8 mm or more and 1.2 mm or less. The interval between the ejection openings 13e of the first gas flow paths 13 (ejection openings 14e of the second gas flow paths 14) is 0.01 mm or more, preferably 0.03 mm or more, and 1 mm or less, preferably 0. 0.5 mm or less, more specifically 0.01 mm or more and 1 mm or less, and more preferably 0.03 mm or more and 0.5 mm or less.

  In the slit nozzle 1, the interval between the ejection ports 13 e of the first gas flow paths 13 adjacent in the longitudinal direction (Y direction) and the length of the ejection openings 14 e of the second gas flow paths 14 are the same. In other words, the interval between the ejection openings 14e of the second gas flow paths 14 adjacent in the longitudinal direction (Y direction) and the length of the ejection openings 13e of the first gas flow paths 13 are the same.

  The slit nozzle 1 includes the positions of the ejection ports 13e of the plurality of first gas flow paths 13 formed in the gap between the first member 4 and the first intermediate member 2, and the second member 5 and the second intermediate member 3. Means that can adjust the positions of the jet outlets 14e of the plurality of second gas flow paths 14 formed in the gap in the longitudinal direction (Y direction) are provided. Specifically, as described above, the second member 5 has a plurality of perfect circular through holes 53, and the second intermediate member 3 has a plurality of perfect circular through holes 33. The through hole 53 and each through hole 33 have the same formation position and shape. On the other hand, the first member 4 has a plurality of through holes 43 having a circular flat shape that is long in the Y direction, and the first intermediate member 2 has a plurality of through holes 23 having a circular flat shape that is long in the Y direction. The through holes 43 and the through holes 23 have the same formation positions and shapes. Thus, the inserted bolts (not shown) can move in the Y direction between the through holes 43 and the through holes 23. Therefore, the first member 4 and the first intermediate member 2 are overlapped, and the second member 5 and the second intermediate member 3 are overlapped, and a plurality of through holes 43, 23, 33, When the slit nozzle 1 is formed integrally by passing a bolt (not shown) through 53 and tightening the bolt with a bolt (not shown) and a nut (not shown), as shown in FIG. ) And a nut (not shown) to adjust the bolting position, and the first member 4 and the first intermediate member 2 are overlapped with the second member 5 and the second intermediate member 3 overlapped with each other. The combined items can be moved back and forth in the Y direction.

  As described above, the slit nozzle 1 has means capable of adjusting the position of the jet outlet 13e of the first gas flow path 13 and the position of the jet outlet 14e of the second gas flow path 14 in the longitudinal direction (Y direction). Therefore, as shown in FIG. 8, the outlets 14e of the second gas passages 14 are arranged at positions between the outlets 13e of the first gas passages 13 adjacent in the longitudinal direction (Y direction). It can be adjusted so that the jet outlets 13e of the first gas passages 13 are arranged at positions between the jet outlets 14e of the second gas passages 14 adjacent in the longitudinal direction (Y direction). In this way, by arranging the outlets 13e of the plurality of first gas passages 13 and the outlets 14e of the plurality of second gas passages 14, the front end portion 11 of the slit nozzle 1 is front as shown in FIG. As seen, no gap is formed between the jet outlets 13e of the plurality of first gas flow paths 13 and the jet outlets 14e of the plurality of second gas flow paths 14, and the first gas flow paths 13 can be arranged in a straight line.

  Further, as described above, there is a means capable of adjusting the position of the jet outlet 13e of the first gas flow path 13 and the position of the jet outlet 14e of the second gas flow path 14 in the longitudinal direction (Y direction). Therefore, as shown in FIG. 10, when the front end portion 11 of the slit nozzle 1 is viewed from the front, one end portion 13 e 1 of the ejection port 13 e of each first gas channel 13 and the ejection port of each second gas channel 14. It can adjust so that one terminal part 14e1 of 14e may overlap. When adjusted to overlap in this way, in the slit nozzle 1, the front end portion 11 of the slit nozzle 1 is viewed from the front as shown in FIG. 9, and the other of the outlets 13 e of the plurality of first gas flow paths 13. A gap is formed between the end portion and the other end portion of the ejection ports 14 e of the plurality of second gas flow paths 14. The overlapping width W between the end portion 13e1 and the end portion 14e1 is determined from the viewpoint of atomization of the spray droplet diameter and the effect on the uniform spray over a wide range (gas outlet (the outlet 13e of the first gas channel 13 or the second gas). The length is preferably 0% or more and 50% or less in the longitudinal direction (Y direction) of the jet outlet 14e) of the flow path 14.

As materials of the first intermediate member 2, the second intermediate member 3, the first member 4 and the second member 5 constituting the slit nozzle 1, in addition to metals such as aluminum alloy, stainless steel, steel and titanium, ceramic, Examples thereof include heat-resistant resins, which can be appropriately selected depending on the application.
As a liquid sprayed by the slit nozzle 1, various liquids can be used according to a use. Various gases can be used as the gas used when the liquid is sprayed by the slit nozzle 1 depending on the liquid.

Next, the operation of the slit nozzle 1 will be described with reference to FIGS.
First, a liquid supply pipe (not shown) is connected to the liquid inlet 45 of the slit nozzle 1, and a gas supply pipe (not shown) is connected to each of the gas inlet 47 and the gas inlet 57.
As shown in FIG. 6, the liquid supplied from the liquid introduction port 45 flows from the upstream side toward the downstream side (front end portion 11 side), the liquid supply path 46, the liquid supply port 24, the liquid reservoir chamber 6, and the liquid The liquid flows in the order of the flow path 12 and the liquid is ejected from the ejection port 12e of the liquid flow path 12.
As shown in FIG. 6, the gas supplied from the gas introduction port 47 flows from the upstream side toward the downstream side (tip portion 11 side), the first gas reservoir 71, the gas flow path 72, and the second gas reservoir. 73 and flows in the order of the plurality of first gas flow paths 13, and gas is ejected from the outlet 13 e of the first gas flow path 13.
Further, as shown in FIG. 6, the gas supplied from the gas introduction port 57 flows from the upstream side toward the downstream side (tip portion 11 side), the first gas reservoir 81, the gas flow path 82, and the second gas. Gas flows in the order of the reservoir 83 and the plurality of second gas passages 14, and then jets out from the outlet 14 e of the second gas passage 14.

  In the slit nozzle 1, as shown in FIG. 7, when the tip end portion 11 is viewed in cross section, the extending direction of the first gas flow path 13 is an acute angle (intersection angle θ 1) with respect to the extending direction of the liquid flow path 12. Furthermore, the extending direction of the second gas channel 14 intersects the extending direction of the liquid channel 12 at an acute angle (intersecting angle θ2). As shown in FIGS. 8 and 10, the front end portion 11 is viewed from the front, and the jet outlet 12e of the liquid flow path 12 extends in the longitudinal direction (Y direction), along both sides of the jet outlet 12e. A plurality of jet outlets 13e of the first gas channel 13 and jet nozzles 14e of the second gas channel 14 are arranged at intervals in the longitudinal direction (Y direction). Therefore, with respect to the liquid ejected from the ejection port 12e of the liquid channel 12, the gas ejected from the ejection port 13e of the first gas channel 13 and the ejection from the ejection port 14e of the second gas channel 14 from both sides thereof. Gas to collide. Further, as shown in FIGS. 8 and 10, the front end portion 11 is viewed from the front, and the jet outlets 13e of the first gas flow path 13 and the jet outlets 14e of the second gas flow path 14 are alternately arranged. Therefore, the liquid ejected from the ejection port 12e collides with the gas ejected from the ejection port 13e, and the liquid is sprayed in a direction crossing the extending direction of the liquid flow path 12, and the liquid ejected from the ejection port 12e is ejected. The liquid collides with the gas ejected from the outlet 14e and is sprayed in the direction crossing the extending direction of the liquid flow path 12, and the liquid is sprayed uniformly over a wide range.

  In particular, in the slit nozzle 1, as shown in FIGS. 8 and 10, the number of the ejection ports 13 e of the first gas channel 13 and the number of the ejection ports 14 e of the second gas channel 14 are the same, The outlet 13e of each first gas channel 13 and the outlet 14e of each second gas channel 14 have the same shape and the same size. Therefore, the flow velocity of the gas ejected from each ejection port 13e and the flow velocity of the gas ejected from each ejection port 14e are substantially the same, and the liquid ejected from the ejection port 12e is substantially the same force from both sides thereof. The gas ejected from the ejection port 13e and the gas ejected from the ejection port 14e collide with each other. Therefore, the liquid spreads in a substantially uniform range with respect to the extending direction of the liquid flow path 12 and is uniformly sprayed.

  Further, as shown in FIG. 9, the slit nozzle 1 determines the positions of the outlets 13 e of the plurality of first gas passages 13 and the positions of the outlets 14 e of the plurality of second gas passages 14, FIG. As shown in FIG. 10, it has means that can be adjusted in the longitudinal direction (Y direction). As described above, since the overlap width W between the end portion 13e1 and the end portion 14e1 can be adjusted, it is possible to adjust the flow rate of the gas that squeezes the liquid and collides, and the spray is separated in two directions by changing the spray conditions. Even in this case, the range in which the liquid is sprayed uniformly can be adjusted.

  The slit nozzle of this invention is not restrict | limited to the slit nozzle 1 of the above-mentioned embodiment at all, and can be changed suitably.

  For example, in the slit nozzle 1 of the above-described embodiment, as shown in FIG. 7, the intersection angle θ1 between the extending direction of the liquid flow path 12 and the extending direction of the first gas flow path 13 is the liquid flow path 12. Although the crossing angle θ2 between the extending direction of the second gas channel 14 and the extending direction of the second gas flow path 14 coincides, it does not need to coincide.

  Moreover, in the slit nozzle 1 of the above-mentioned embodiment, as shown in FIG. 8, FIG. 10, the number of the ejection openings 13e of the 1st gas flow path 13 and the number of the ejection openings 14e of the 2nd gas flow path 14 are. It matches, but it does not need to match. Moreover, although the jet outlet 13e of each 1st gas flow path 13 and the jet outlet 14e of each 2nd gas flow path 14 are the same in shape and the magnitude | size is formed, it is not necessary to be the same. .

  Moreover, in the slit nozzle 1 of the above-mentioned embodiment, as shown in FIG. 6, although the liquid introduction port 45 is formed in the 1st member 4 in the back surface (surface on the opposite side to the sharp part 41 side), it is a slit. Depending on the size of the nozzle 1, it may be formed in another location.

  Further, in the slit nozzle 1 of the above-described embodiment, as shown in FIG. 6, the liquid reservoir chamber 6 has a plane facing the second intermediate member 3 in the first intermediate member 2 and the second intermediate member 3. 1 deep bottom concave portion 341, second deep bottom concave portion 342 and third deep bottom concave portion 343 are formed in combination, but the first intermediate member 2 is provided with a concave portion on the surface facing the second intermediate member 3, The surface of the second intermediate member 3 facing the first intermediate member 2 may be formed as a flat surface, or may be formed by providing a recess on each of the surfaces facing each other. Further, the liquid reservoir 6 may be omitted.

  Moreover, in the slit nozzle 1 of the above-mentioned embodiment, as shown in FIG. 6, the 1st gas reservoir 71, the gas flow path 72, and the 2nd gas reservoir 73 are the 1st member 4 in the 1st intermediate member 2. As shown in FIG. The first concave portion 441, the second concave portion 442, and the third concave portion 443 are formed in combination with each other, but are opposed to the first member 4 in the first intermediate member 2. Three concave portions may be provided on the surface, and the surface facing the first intermediate member 2 of the first member 4 may be formed as a flat surface, or the concave portions may be provided on the surfaces facing each other. Further, the first gas reservoir 71, the gas flow path 72, and the second gas reservoir 73 may be omitted. The first gas reservoir 81, the gas channel 82, and the second gas reservoir 83 are the same as the first gas reservoir 71, the gas channel 72, and the second gas reservoir 73.

  The slit nozzle of the present invention can be used, for example, for spraying water, chemicals, paints and the like.

  The following slit nozzle is further disclosed regarding the embodiment mentioned above.

<1> A laminated body composed of a pair of vertically long first intermediate member and second intermediate member is sandwiched and integrated between the first member on the first intermediate member side and the second member on the second intermediate member side. Slit nozzle,
At the tip of the slit nozzle, a liquid flow path is formed in the gap between the first intermediate member and the second intermediate member, and the first gas flow path is formed in the gap between the first member and the first intermediate member. And a second gas flow path is formed in the gap between the second member and the second intermediate member,
In a sectional view of the tip of the slit nozzle, the extending direction of the first gas channel and the extending direction of the second gas channel intersect each other at an acute angle with respect to the extending direction of the liquid channel. And
When the front end portion of the slit nozzle is viewed from the front, the jet port of the liquid channel extends in the longitudinal direction, and the jet port of the first gas channel extends along both sides of the jet port of the liquid channel. And a plurality of outlets of the second gas flow path are arranged at intervals in the longitudinal direction, and the outlets of the first gas flow path and the outlets of the second gas flow path are alternately arranged. Slit nozzle.

<2> The slit nozzle includes a plane of the first intermediate member that faces the second intermediate member, a first deep bottom recess, a second deep bottom recess, and a third deep bottom recess of the second intermediate member. The slit nozzle according to <1>, wherein a liquid reservoir chamber is formed by combining the two.
<3> The concave portion of the second intermediate member is a first deep concave portion so that the bottom depth gradually decreases from the position corresponding to the liquid supply port of the first intermediate member toward the tip portion. The slit according to <1> or <2>, wherein the slit has the second deep bottom recess and the third deep bottom recess continuously, and the shallow bottom recess having a very shallow bottom. nozzle.
<4> The slit nozzle according to <3>, wherein the second deep-bottom concave portion is formed with a columnar protruding portion that protrudes from the bottom surface toward the first intermediate member.
<5> The first member includes a sharpened portion and a liquid supply path that are pointed toward the liquid flow path in a cross-sectional view in the Z direction, and the concave portion of the first member is formed on the liquid supply path. From the position corresponding to the outlet toward the sharp portion, the first recess having the deepest recess, the second recess having the shallowest recess, and the third recess having the deep recess are continuously provided. The slit nozzle according to any one of <1> to <4>.
<6> A columnar ridge is formed to protrude from the bottom surface of the second recess of the first member toward the first intermediate member, and the ridge is spaced apart in the longitudinal direction (Y direction). The slit nozzle according to <5>, wherein a plurality of the raised portions are raised from the bottom surface of the second recess to a height that matches the height of the flat portion.
<7> The second member includes a sharp portion that is sharp toward the liquid flow path, and the concave portion of the second member is a first concave portion that has the deepest recess toward the sharp portion. The slit nozzle according to any one of <1> to <6>, further including a second recess having the shallowest recess and a third recess having a deep recess.
<8> A columnar ridge is formed to protrude from the bottom surface of the second recess of the second member toward the second intermediate member, and the ridge is spaced apart in the longitudinal direction (Y direction). The slit nozzle according to <7>, wherein a plurality of the raised portions are raised from the bottom surface of the second recess to a height that matches the height of the flat portion.
<9> In the slit nozzle, a plane of the first intermediate member that faces the first member is combined with the first concave portion, the second concave portion, and the third concave portion of the first member. The first gas reservoir, the gas flow path, and the second gas reservoir are formed from the upstream side toward the tip,
The first gas reservoir is formed in communication with the gas inlet of the first member, and the second gas reservoir is narrower than the interval between the second gas reservoir and the first gas reservoir. Any of <5> to <8>, wherein the first gas reservoir is in communication with the first gas reservoir via the gas channel, and the first gas channel is formed in communication with the second gas reservoir. Or a slit nozzle according to claim 1.

<10> The first intermediate member is formed in a trapezoidal shape having a tip when viewed in a cross-section in the Z direction, and the tip is formed on the second intermediate member from the surface facing the first member. The angle θ1 formed by the inclined surface 22 and the surface facing the second intermediate member is 15 ° or more, preferably 20 ° or more, more preferably 22.5 ° or more, and 75 ° or less, preferably 60 ° or less, more preferably 45 ° or less, and more specifically 15 ° or more and 75 ° or less. The slit nozzle according to any one of <1> to <9>, preferably 20 ° to 60 °, more preferably 22.5 ° to 45 °.
<11> The second intermediate member is formed in a trapezoidal shape having a tip when viewed in a cross-section in the Z direction, and the tip is formed on the first intermediate member from the surface facing the second member. An angle θ2 formed by the inclined surface and the surface facing the first intermediate member is 15 ° or more, preferably 20 Or more, more preferably 22.5 ° or more, and 75 ° or less, preferably 60 ° or less, more preferably 45 ° or less, and more specifically 15 ° or more and 75 ° or less. The slit nozzle according to any one of <1> to <10>, which is preferably 20 ° to 60 °, and more preferably 22.5 ° to 45 °.
<12> The first member includes a sharp portion that is pointed toward the liquid channel in a cross-sectional view in the Z direction, and the sharp portion is formed on an inclined surface of a tip portion of the first intermediate member. The angle θ3 formed by the inclined surface and the flat portion is 105 ° or more, preferably 120 ° or more, more preferably 135 ° or more, and 165. Or less, preferably 160 ° or less, more preferably 157.5 ° or less, more specifically 105 ° or more and 165 ° or less, preferably 120 ° or more and 160 ° or less, and more preferably 135 ° or more. The slit nozzle according to <10> or <11>, which is 157.5 ° or less.
<13> The second member includes a sharp portion that is pointed toward the liquid channel in a cross-sectional view in the Z direction, and the sharp portion is formed on an inclined surface of a tip portion of the second intermediate member. Correspondingly, it has an inclined surface that is uniformly inclined, and an angle θ4 (see FIG. 1) formed by the inclined surface and the plane portion is 105 ° or more, preferably 120 ° or more, more preferably 135 ° or more. And not more than 165 °, preferably not more than 160 °, more preferably not more than 157.5 °, more specifically not less than 105 ° and not more than 165 °, preferably not less than 120 ° and not more than 160 °, The slit nozzle according to <11> or <12>, which is preferably 135 ° or more and 157.5 ° or less.
<14> When the front end portion of the slit nozzle is viewed from the front, the length in the longitudinal direction of the ejection port of each of the first gas channels is the same as the length in the longitudinal direction of the ejection port of each of the second gas channels. The slit nozzle according to any one of <1> to <13>.
<15> The length in the Y direction of the ejection port of each first gas channel or the ejection port of each second gas channel is 0.1 mm or more, preferably 0.5 mm or more, more preferably 0.8 mm or more. 2 mm or less, preferably 1.5 mm or less, more preferably 1.2 mm or less, more specifically 0.1 mm or more and 2 mm or less, preferably 0.5 mm or more and 1.5 mm or less, more preferably The slit nozzle according to any one of <1> to <14>, preferably 0.8 mm or more and 1.2 mm or less.
<16> The interval between the outlet of each first gas channel or the outlet of each second gas channel is 0.01 mm or more, preferably 0.03 mm or more, and 1 mm or less, preferably 0.5 mm. Hereinafter, more specifically, it is preferably 0.01 mm or more and 1 mm or less, and more preferably 0.03 mm or more and 0.5 mm or less, and the slit according to any one of the above items <1> to <15>. nozzle.

<17> When the front end portion of the slit nozzle is viewed from the front, the interval between the ejection ports of the first gas flow paths adjacent in the longitudinal direction matches the length of the ejection holes of the second gas flow paths. The slit nozzle according to any one of <1> to <16>.
<18> When the front end portion of the slit nozzle is viewed from the front, one end portion of the ejection port of each of the first gas passages overlaps with one end portion of the ejection port of each of the second gas passages. The slit nozzle according to any one of <1> to <17>.
<19> When adjusted so as to overlap, the front end portion of the slit nozzle is viewed from the front, the other end of the outlet of each first gas channel and the other outlet of each second gas channel A gap is generated between the end of each of the first gas flow paths, and the overlap width W between the end of each of the first gas flow paths and the end of each of the second gas flow paths is the length of the gas outlet. The slit nozzle according to <18>, wherein the length is 0% or more and 50% or less of the direction.
<20> Formed in gaps between the second member and the second intermediate member, and positions of the outlets of the plurality of first gas flow paths formed in the gap between the first member and the first intermediate member. The slit nozzle according to any one of <1> to <19>, further including means capable of adjusting the positions of the ejection ports of the plurality of second gas flow paths in the longitudinal direction.
<21> The first member has a plurality of through holes having a circular flat shape that is long in the longitudinal direction (Y direction), and the first intermediate member has a plurality of circular flat shapes that are long in the longitudinal direction (Y direction). It has a through hole, and each through hole of the first member and each through hole of the first intermediate member have the same formation position and shape, and any one of <1> to <10> The slit nozzle as described.
<22> The means that can be adjusted in the longitudinal direction (Y direction) is formed by superimposing the first member and the first intermediate member on the superposition of the second member and the second intermediate member. The slit nozzle according to the above <20>, wherein the combined product can be moved back and forth in the longitudinal direction (Y direction).

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited by the examples.

[Example 1]
The slit nozzle which has the structure similar to the slit nozzle 1 of the said embodiment shown in FIGS. 1-10 was used. The slit nozzle will be described in detail. The angle θ1 formed by the tip of the first intermediate member 2 is 45 °, and the angle θ2 formed by the tip of the second intermediate member 3 is also 45 °. The inclination angle θ3 of the inclined surface of the first member 4 was 135 °, and the inclination angle θ4 of the inclined surface of the second member 5 was also 135 °. The jet outlet 12e of the liquid flow path 12 had a length in the Y direction of 100 mm and an interval of 0.1 mm. Next, the number of the jet outlets 13e of the first gas flow path 13 and the number of the jet outlets 14e of the second gas flow path 14 were 50, and each had a rectangular shape that was long in the longitudinal direction (Y direction). The outlet 13e of each first gas channel 13 (the outlet 14e of each second gas channel 14) had a length in the Y direction of 1 mm and an interval of 0.1 mm. The interval between the jet ports 13e of the first gas flow paths 13 adjacent in the longitudinal direction (Y direction) and the interval between the jet ports 14e of the second gas flow paths 14 adjacent in the longitudinal direction (Y direction) were also 1 mm. And the overlap width W of the terminal part 13e1 and the terminal part 14e1 was 0.3 mm.

[Comparative Example 1]
The slit of Example 1 except that the outlet of the first gas channel and the outlet of the second gas channel extend continuously in the longitudinal direction (Y direction), like the outlet of the liquid channel. A slit nozzle having the same conditions as the nozzle was used. The slit nozzle of the comparative example 1 is a slit nozzle which provided the injection port which ejects one liquid between the ejection ports which eject two gas similarly to the slit nozzle of the patent document 3 mentioned above. . The slit nozzle of Comparative Example 1 will be described in detail. Each of the liquid channel ejection port, the first gas channel ejection port, and the second gas channel ejection port has a length in the Y direction of 100 mm and an interval of 0. 0. It was 1 mm.

[Performance evaluation]
Regarding the slit nozzles of Example 1 and Comparative Example 1, the spray range and the uniformity of the sprayed liquid were evaluated according to the following methods. The liquid used was water and the gas used was air. The results of the spray range are shown in the following Table 1, and the results of the uniformity of the sprayed liquid are shown in the following Table 1 and FIGS.

[Spraying range]
The slit nozzles of Example 1 and Comparative Example 1 are installed so that the tip portion is in the horizontal direction, the flow rate of the liquid flow is 457 mL / min, the flow rate of the gas flow from the outlet of the first gas flow path, and the second The flow rate of the gas flow from the gas channel outlet was set to 250 NL / min, and the liquid was sprayed. In the slit nozzle of Example 1, the flow rate from the ejection port 13e of each first gas channel 13 and the flow rate from the ejection port 14e of each second gas channel 14 were set to the above values. The state in which the liquid is sprayed from the slit nozzle of Example 1 and Comparative Example 1 is photographed from the side using a digital camera, and the maximum spray angle is visually observed with respect to the image or the printed photograph. Was measured. The slit nozzles of Example 1 and Comparative Example 1 were measured three times, and the average value was taken as the spray range of each slit nozzle.

[Uniformity]
In order to evaluate the uniformity of the sprayed liquid, the measuring tool 100 shown in FIG. 11 was produced. The measuring tool 100 has a rectangular parallelepiped shape of 360 mm in the vertical direction (the same direction as the Y direction), 230 mm in the horizontal direction (the same direction as the X direction), and 325 mm in the height direction. As shown in FIG. 11, the measuring tool 100 is a test in which a square plate 110 is arranged on the top surface, a plate 120 is arranged below the square plate 110, and an opening is formed below the plate 120 toward the top surface. A plurality of tubes 130 are formed. As shown in FIGS. 11 and 12, the grid plate 110 has a group of 15 ridges 111 that are 20 mm in the Y direction and 20 mm in the X direction, arranged in the Y direction with 10 rows in the X direction without any gaps. Yes. As shown in FIG. 12, a circular opening 112 having a diameter of 16 mm is formed at the bottom of each ridge 111. As shown in FIG. 11, through holes 121 are formed in the plate 120 at positions corresponding to the openings 112 of the ribs 111 of the grid plate 110. A plurality of test tubes 130 are arranged at positions corresponding to the openings 112 of the ridges 111 of the grid plate 110 and at positions corresponding to the through holes 121 of the plate 120.

  Next, as shown in FIG. 11, the slit nozzles of Example 1 and Comparative Example 1 are on a bisector whose tip extends in the Y direction of the measuring tool 100 (Y in the fifth column from the left shown in FIG. 11). It was installed toward the measuring tool 100 so as to be positioned on the group of ridges 111 extending in the direction. The distance between the tip of the slit nozzle and the measuring tool is 155 mm. Then, the flow rate of the liquid flow is set to 457 mL / min, the flow rate of the gas flow from the jet port of the first gas channel and the flow rate of the gas flow from the jet port of the second gas channel are set to 250 NL / min. The liquid was sprayed for 1 minute. Then, the amount of liquid collected in each test tube 130 after the liquid was sprayed for 1 minute by each slit nozzle was measured, and a contour map showing the distribution of the liquid spray amount was created. Each test tube 130 is assigned a Y-direction number and an X-direction number. For example, the test tube 130a shown in FIG. 11 is a test tube whose position in the Y direction is No. 15 and whose position in the X direction is No. 1, and that of the test tube 130b is No. 1 in the Y direction and No. 1 in the X direction. The test tube 130c is a test tube whose position in the Y direction is number 15 and whose position in the X direction is number 10.

  FIG. 13 is a contour map showing the distribution of the liquid spray amount by the slit nozzle of Example 1, and FIG. 14 is a contour map showing the distribution of the liquid spray amount by the slit nozzle of Comparative Example 1. 15A is a line graph taken along the line AA ′ shown in FIG. 13 and the line AA ′ line shown in FIG. 14, and FIG. 15B is a cross section taken along the line BB ′ shown in FIG. It is a line graph in the BB 'line cross section shown in FIG.

As is clear from the results shown in Table 1, the slit nozzle of Example 1 was found to have a wider spray range than the slit nozzle of Comparative Example 1.
Moreover, as is clear from the results shown in Table 1 and the results shown in FIGS. 13 to 15, the slit nozzle of Example 1 has a larger spray area than the slit nozzle of Comparative Example 1, and further the liquid sprayed. It was found that the uniformity was high.

DESCRIPTION OF SYMBOLS 1 Slit nozzle 11 Front-end | tip part 12 Liquid flow path 12e Spout 13 First gas flow path 13e Spout 14 Second gas flow path 14e Spout 20 Laminate 2 1st intermediate member 21 Front-end | tip part 22 Inclined surface 23 Through-hole 24 Liquid Supply port 25 Bolt tightening hole 3 Second intermediate member 31 Tip portion 32 Inclined surface 33 Through hole 34 Recess 341 First deep bottom recess 341a T-shaped horizontal bar portion, 341b T-shaped vertical bar portion 342 Second depth Bottom recessed portion 342a Raised portion 343 Third deep bottom recessed portion 344 Shallow bottom recessed portion 35 Bolt tightening hole 4 First member 41 Sharp portion 42 Inclined surface 421 Groove portion 43 Through hole 44 Recessed portion 441 First recessed portion 442 Second recessed portion 442a Raised portion 443 3 concave portion 444 flat portion 45 liquid inlet 46 liquid supply passage 47 gas inlet 48 bolt through hole 5 second member 51 pointed portion 52 inclined surface 521 groove 53 through hole 54 recess 541 first recess 542 second recess 542a raised portion 543 third recess 544 flat portion 57 gas inlet 58 bolt through hole 6 liquid reservoir 71 first gas reservoir, 72 gas Channel, 73 second gas reservoir 81 first gas reservoir, 82 gas channel, 83 second gas reservoir 91, 92 volts

Claims (5)

A slit nozzle integrated by sandwiching a laminate composed of a pair of vertically long first intermediate member and second intermediate member between the first member on the first intermediate member side and the second member on the second intermediate member side Because
At the tip of the slit nozzle, a liquid flow path is formed in the gap between the first intermediate member and the second intermediate member, and the first gas flow path is formed in the gap between the first member and the first intermediate member. And a second gas flow path is formed in the gap between the second member and the second intermediate member,
In a sectional view of the tip of the slit nozzle, the extending direction of the first gas channel and the extending direction of the second gas channel intersect each other at an acute angle with respect to the extending direction of the liquid channel. And
When the front end portion of the slit nozzle is viewed from the front, the jet port of the liquid channel extends in the longitudinal direction, and the jet port of the first gas channel extends along both sides of the jet port of the liquid channel. And a plurality of outlets of the second gas flow path are arranged at intervals in the longitudinal direction, and the outlets of the first gas flow path and the outlets of the second gas flow path are alternately arranged. Slit nozzle.   The length in the longitudinal direction of the ejection port of each of the first gas flow paths is the same as the length in the longitudinal direction of the ejection port of each of the second gas flow paths when the front end portion of the slit nozzle is viewed from the front. The slit nozzle according to 1.   The front end portion of the slit nozzle is viewed from the front, and the interval between the ejection ports of the first gas flow paths adjacent in the longitudinal direction matches the length of the ejection holes of the second gas flow paths. The slit nozzle according to 1 or 2.   The front end portion of the slit nozzle is viewed from the front, and one end portion of the ejection port of each first gas flow channel and one end portion of the ejection port of each second gas flow channel overlap each other. The slit nozzle according to 1 or 2.   A plurality of positions formed at gaps between the second member and the second intermediate member, and positions of jet ports of the plurality of first gas flow paths formed in the gap between the first member and the first intermediate member. The slit nozzle of any one of Claims 1-4 which has a means which can adjust the position of the jet nozzle of said 2nd gas flow path of a longitudinal direction.