JP2015093265A - Slit nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slit nozzle which is inexpensive, has excellent maintainability, can adjust the heating of a liquid stably, can prevent the solidification of the liquid to be atomized, and can atomize and spray the liquid homogeneously.SOLUTION: A slit nozzle 1 is equipped at a first intermediate member 2 or a second intermediate member 3 with heating means 25 and 35, and a first seal member 4 or a second seal member 5 on the side having the heating means 25 and 35 has insulation members 41 and 51. When a leading end part 11 of the slit nozzle 1 is sectionally seen, the extending direction of a first gas passage 13 and the extending direction of a second gas passage 14 intersect at an acute angle with respect to the extending direction of a liquid passage 12. When the leading end 11 is seen in the front, the injection port 12e of the fluid passage 12, the injection port 13e of the first gas passage 13, and the injection port 14e of the second gas passage 14 extend in a Y direction.

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. As a slit nozzle, for example, Patent Document 1 describes a nozzle provided with an ejection port for ejecting one liquid between gaps ejecting two gases. In the slit nozzle described in Patent Document 1, an ejection port for ejecting liquid is sandwiched between two gaps for ejecting gas, and two gaps for ejecting gas with respect to a direction in which the ejection port for ejecting liquid extends. The extending direction intersects at an acute angle. Therefore, the liquid can be sprayed uniformly.

  As techniques different from the slit nozzle, Patent Documents 2 and 3 disclose techniques for spraying a liquid heated from a nozzle so that the liquid does not solidify in the nozzle. However, since the nozzles described in Patent Documents 2 and 3 are not slit nozzles, liquid cannot be sprayed uniformly.

Special table 2009-517214 JP-A-1-215363 JP-A-7-16532

  As a method of heating the slit nozzle as described in Patent Document 1, a method of installing an electric heater or a jacket pipe outside the slit nozzle is generally known. If the slit nozzle can be heated in this way, solidification of the liquid to be sprayed can be prevented, the risk of damage to the slit nozzle due to clogging or clogging of the injection nozzle due to solidification of the liquid can be suppressed, and the liquid can be atomized uniformly and sprayed. It becomes possible.

  However, the method of heating the slit nozzle by installing an electric heater or jacket pipe outside the slit nozzle raises the manufacturing cost, and it is difficult to attach and detach the electric heater or jacket pipe once installed. It was. Moreover, in the slit nozzle of patent document 1, when heating the liquid to eject, gas is ejected between the electric heater or jacket piping installed in the outer side of a slit nozzle, and the injection nozzle which ejects a liquid. Because of the presence of voids, the adjustment of heating of the ejected liquid was unstable.

  Accordingly, it is an object of the present invention to provide a slit nozzle that can eliminate the drawbacks of the prior art described above.

  The present invention sandwiches a laminate composed of a pair of vertically long first intermediate member and second intermediate member between the first seal member on the first intermediate member side and the second seal member on the second intermediate member side, A slit nozzle integrated with the first member on the first seal member side and the second member on the second seal member side, wherein the slit nozzle is integrated. At least one of the first sealing member or the second sealing member on the first intermediate member side or the second intermediate member side having the heating unit has a heat insulating member, and has a heat insulating member. At the tip of the nozzle, a liquid flow path is formed in the gap between the first intermediate member and the second intermediate member, and a first gas flow path is formed in the gap between the first member and the first intermediate member. And a second gas in the gap between the second member and the second intermediate member. A passage is formed, and when the tip of the slit nozzle is viewed in cross-section, the extending direction of the first gas channel and the extending direction of the second gas channel with respect to the extending direction of the liquid channel Are crossed at an acute angle, and the front end of the slit nozzle is viewed from the front, and the first gas flow path is disposed on both sides of the liquid flow path and the liquid flow path. The jet nozzle and the jet port of the second gas channel each provide a slit nozzle extending in the longitudinal direction.

  According to the present invention, it is inexpensive, has good maintainability, can stably adjust the heating of the liquid, can prevent the liquid to be sprayed from solidifying, and can atomize and spray the liquid uniformly.

FIG. 1 is a diagram schematically showing how to assemble a slit nozzle according to an embodiment of the present invention. 2A is a plan view of the inner surface of the first intermediate member of the slit nozzle shown in FIG. 1, and FIG. 2B is a plan view of the outer surface of the first intermediate member of the slit nozzle shown in FIG. FIG. 3A is a plan view of the inner surface of the second intermediate member of the slit nozzle shown in FIG. 1, and FIG. 3B is a plan view of the outer surface of the second intermediate member of the slit nozzle shown in FIG. FIG. FIG. 4 is a plan view of the outer surface of the first seal member of the slit nozzle shown in FIG. FIG. 5 is a plan view of the outer surface of the second seal member of the slit nozzle shown in FIG. FIG. 6 is a plan view of the inner surface of the first member of the slit nozzle shown in FIG. FIG. 7 is a plan view of the inner surface of the second member of the slit nozzle shown in FIG. FIG. 8 is a cross-sectional view of a slit nozzle according to an embodiment of the present invention. 9 is a cross-sectional view of the tip of the slit nozzle shown in FIG. FIG. 10 is a plan view when the front end portion of the slit nozzle shown in FIG. 8 is viewed from the front. FIG. 11 is a graph for confirming the effect of the heat insulating member of the slit nozzle shown in FIG.

Hereinafter, the slit nozzle of this invention is demonstrated based on the preferable embodiment, referring 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 seal member 4 on the first intermediate member 2 side. And the second seal member 5 on the second intermediate member 3 side, which is further covered and integrated with the first member 6 on the first seal member 4 side and the second member 7 on the second seal member 5 side. It becomes. Specifically, the slit nozzle 1 forms the multiple structure 30 by sandwiching the laminated body 20 between the first seal member 4 from the first intermediate member 2 side and the second seal member 5 from the second intermediate member 3 side. The multiple structure 30 is integrally formed so as to be covered with the first member 6 from the first seal member 4 side and the second member 7 from the second seal member 5 side. More specifically, the slit nozzle 1 includes a first intermediate member 2, a second intermediate member 3, a first seal member 4, a second seal member 5, a first member 6, and a second plate that are six plate-like bodies. The members 7 are integrally formed by overlapping. 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. 2A, the first intermediate member 2 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. It is formed in a trapezoidal shape composed of a triangular tip portion 21 and a rectangular main body portion 22. As shown in FIG. 1, the distal end portion 21 has an inclined surface 211 that smoothly inclines from the surface facing the first member 6 toward the surface facing the second intermediate member 3. The angle θ1 (see FIG. 1) formed by the inclined surface 211 and the surface facing the second intermediate member 3 is 15 ° from the viewpoints 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 °.

  The main body portion 22 of the first intermediate member 2 is recessed toward the first seal member 4 in the center region of the surface facing the second intermediate member 3 in the slit nozzle 1 as shown in FIG. A recess 24 is formed. Thus, the main body 22 has the recess 24 on the surface facing the second intermediate member 3, and the region excluding the recess 24 is formed on a flat plane. As shown in FIG. 1 and FIG. 2A, the first intermediate member 2 has a bolt-tightening through-hole 23 that penetrates in the thickness direction (Z direction) along the outer periphery of the main body 22 excluding the recess 24. A plurality are formed. A plurality of through-holes 23 are formed at intervals in the longitudinal direction (Y direction) along the non-tip end side along the longitudinal direction (Y direction), and both end portions in the longitudinal direction (Y direction). A plurality of each is formed with an interval in the X direction. Each through-hole 23 is formed in a perfect circle shape in the slit nozzle 1. Moreover, in the main-body part 22 of the 1st intermediate member 2, as shown to FIG.1, FIG.2 (a), in the part located in the center of the side part by the side of the non-tip part along a longitudinal direction (Y direction), A circular liquid supply port 26 for supplying liquid penetrating in the thickness direction (Z direction) is formed. A packing member made of rubber, plastic or the like is provided on the outer periphery of the liquid supply port 26 on the surface of the first intermediate member 2 on the first seal member 4 side from the viewpoint of preventing leakage. May be.

  As shown in FIGS. 1 and 2A, the recess 24 of the main body portion 22 of the first intermediate member 2 is stepwise from the position of the liquid supply port 26 of the first intermediate member 2 toward the distal end portion 21. The first deep bottom concave portion 241, the second deep bottom concave portion 242, and the third deep bottom concave portion 243 are continuously provided so that the depth of the bottom becomes shallow. The first deep bottom concave portion 241 is deepest in the concave portion 24 and is formed in a T shape when seen in a plan view from the side facing the second intermediate member 3. The T-shaped horizontal bar portion 241 a extends in parallel with the longitudinal direction (Y direction), and the T-shaped vertical bar portion 241 b is formed at a position corresponding to the liquid supply port 26. The horizontal bar portion 241a in the first deep bottom recess 241 has a smooth bottom surface. The second deep bottom recess 242 extends in parallel to the longitudinal direction (Y direction) when seen in a plan view from the side facing the second intermediate member 3. The second deep bottom recess 242 has a smooth bottom surface. The third deep bottom concave portion 243 extends in parallel with the longitudinal direction (Y direction) in a plan view from the surface facing the second intermediate member 3, and includes the first deep bottom concave portion 241 and the second deep bottom. It is formed shallower than the depth of the recess 242.

  As shown in FIG. 1 and FIG. 2A, the first intermediate member 2 has a distal end portion 21 at the center region in the longitudinal direction (Y direction) and from the concave portion 24 to the distal end of the distal end portion 21 as shown in FIGS. A shallow concave portion 212 having a very shallow bottom compared to the concave portion 24 is formed. The shallow bottom recess 212 is formed along the longitudinal direction (Y direction) when seen in a plan view from the side facing the second intermediate member 3. The shallow concave portion 212 has a flat bottom surface.

  As shown in FIGS. 1 and 2B, the first intermediate member 2 has a heating means 25 in the slit nozzle 1. The heating means 25 has a flow path 251 provided on the surface of the first intermediate member 2 on the first seal member 4 side. The flow path 251 constituting the heating means 25 is arranged at a position corresponding to the liquid reservoir chamber 110 (see FIG. 8) formed between the first intermediate member 2 and the second intermediate member 3. Specifically, the main body portion 22 of the first intermediate member 2 includes the second intermediate member in the central region of the surface facing the first seal member 4 in the slit nozzle 1 as shown in FIG. A flow path 251 made of a groove recessed on the 3 side is formed. The flow path 251 in the central region is at a position corresponding to the liquid reservoir chamber 110, that is, at a position corresponding to the concave portion 24 on the surface facing the second intermediate member 3 in the first intermediate member 2 forming the liquid reservoir chamber 110. , Formed with a constant groove depth.

  In the slit nozzle 1, the flow path 251 constituting the heating means 25 of the first intermediate member 2 is located in a region corresponding to the liquid reservoir 110 (see FIG. 8), as shown in FIGS. In other words, the first intermediate member 2 is formed by being folded a plurality of times in a region corresponding to the concave portion 24 on the surface side facing the second intermediate member 3. Specifically, the flow path 251 of the first intermediate member 2 is a starting point portion at each of both end portions in the longitudinal direction (Y direction) on the side portion on the non-tip end side along the longitudinal direction (Y direction) of the main body portion 22. 251 s and an end point 251 e, and in a region corresponding to the recess 24, a plurality of end portions in the longitudinal direction (Y direction) are bent back and extend linearly, and from the start point 251 s to the end point 251 e It is formed with a single stroke. Further, on the surface of the main body portion 22 of the first intermediate member 2 facing the first seal member 4, the slit nozzle 1 has rubber or plastic along the entire outer periphery of the above-described one-stroke channel 251. A packing member 252 made of, for example, is disposed.

  Here, examples of the heating means 25 include those obtained by passing a fluid heated by a heater through the flow path 251, and those provided with a heater heating wire heated by the heater in the flow path 251. In No. 1, a fluid obtained by passing a fluid heated by a heater through a flow path 251 is used. In the slit nozzle 1, the packing member 252 is arranged along the entire outer periphery of the flow path 251, so that the fluid passed through the flow path 251 is the first intermediate member 2 in the integrated slit nozzle 1. Further, leakage from between the first seal members 4 can be prevented.

  Next, as shown in FIG. 3A, the second intermediate member 3 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. Then, it is formed in a trapezoidal shape composed of a triangular tip portion 31 and a rectangular main body portion 32. 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. As shown in FIG. 1, the distal end portion 31 has an inclined surface 311 that smoothly inclines from the surface facing the second member 7 toward the surface facing the first intermediate member 2. The angle θ2 (see FIG. 1) formed by the inclined surface 311 and the surface facing the first intermediate member 2 is 15 ° from the viewpoints 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, it 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 main body 32 of the second intermediate member 3 is recessed toward the second seal member 5 in the central region of the surface facing the first intermediate member 2 as shown in FIG. A recess 34 is formed. Thus, the main body 32 has the recess 34 on the surface facing the first intermediate member 2, and the region excluding the recess 34 is formed on a flat plane. Similarly to the first intermediate member 2, the second intermediate member 3 is formed with a plurality of bolting through holes 33 penetrating in the thickness direction (Z direction) along the outer periphery of the main body 32 excluding the recess 34. Yes. 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 formed in a perfect circle shape in the slit nozzle 1, similar to the shape of the through-hole 23.

  The concave portion 34 of the main body 32 of the second intermediate member 3 is stepped from the position corresponding to the liquid supply port 26 of the first intermediate member 2 toward the distal end portion 31 as shown in FIGS. In particular, 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 that the bottom depth becomes shallow. The first deep bottom concave portion 341 is formed at a position corresponding to the first deep bottom concave portion 241 of the first intermediate member 2, and is the deepest in the concave portion 34 and is viewed in plan view from the surface side facing the first intermediate member 2. Thus, it is formed in a T shape. 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 26 of the first intermediate member 2. Is formed. The bottom portion of the horizontal bar portion 341a in the first deep bottom recess 341 has a smooth bottom surface. The second deep bottom concave portion 342 is formed at a position corresponding to the second deep bottom concave portion 242 of the first intermediate member 2, and is viewed in a longitudinal direction (Y direction) in plan view from the side facing the first intermediate member 2. It extends parallel to. The second deep bottom recess 342 has a smooth bottom surface. The third deep bottom concave portion 343 is formed at a position corresponding to the third deep bottom concave portion 243 of the first intermediate member 2, and is viewed in a longitudinal direction (Y direction) in plan view from the surface facing the first intermediate member 2. The first deep bottom concave portion 341 and the second deep bottom concave portion 342 are shallower than the first deep bottom concave portion 341 and the second deep bottom concave portion 342.

  As shown in FIG. 1 and FIG. 3A, the slit portion 1 has a distal end portion 31 of the second intermediate member 3 in the central region in the longitudinal direction (Y direction) and from the recess 34 to the distal end of the distal end portion 31. A shallow concave portion 312 having a very shallow bottom compared to the concave portion 34 is formed. The shallow concave portion 312 is formed along the longitudinal direction (Y direction) in plan view from the surface facing the first intermediate member 2. The shallow recess 312 has a smooth bottom surface.

  As shown in FIGS. 1 and 3B, the second intermediate member 3 has a heating unit 35 in the slit nozzle 1 as in the case of the first intermediate member 2. The heating means 35 has a flow path 351 provided on the surface of the second intermediate member 3 on the second seal member 5 side. The flow path 351 constituting the heating means 35 is disposed at a position corresponding to the liquid reservoir chamber 110 (see FIG. 8) formed between the first intermediate member 2 and the second intermediate member 3. More specifically, the main body 32 of the second intermediate member 3 includes a first intermediate member in the slit nozzle 1 in the central region of the surface facing the second seal member 5 as shown in FIG. A flow path 351 made of a groove recessed on the second side is formed. The flow path 351 in the central region is at a position corresponding to the liquid reservoir chamber 110, that is, a position corresponding to the concave portion 34 on the surface side facing the first intermediate member 2 in the second intermediate member 3 forming the liquid reservoir chamber 110. , Formed with a constant groove depth.

  In the slit nozzle 1, the flow path 351 constituting the heating means 35 of the second intermediate member 3 is located in a region corresponding to the liquid reservoir chamber 110, that is, the second intermediate member 3 as shown in FIG. In the region corresponding to the concave portion 34 on the surface side facing the first intermediate member 2, a plurality of folds are formed. Specifically, the flow path 351 of the second intermediate member 3 is a starting point portion at each of both end portions in the longitudinal direction (Y direction) on the non-tip end side along the longitudinal direction (Y direction) of the main body portion 32. 351s and an end point portion 351e, and in a region corresponding to the concave portion 34, a plurality of end portions in the longitudinal direction (Y direction) are bent back to extend linearly, and from the start point portion 351s to the end point portion 351e. It is formed with a single stroke. Further, on the surface of the main body 32 of the second intermediate member 3 facing the second seal member 5, in the slit nozzle 1, along the entire outer periphery of the aforementioned one-stroke-shaped channel 351, rubber or plastic A packing member 352 made of, for example, is disposed.

  As the heating means 35 of the second intermediate member 3, as in the case of the heating means 25 of the first intermediate member 2, the one by passing the fluid heated by the heater through the flow path 351 is used. In the slit nozzle 1, the packing member 352 is arranged along the entire outer periphery of the flow path 351, so that the fluid passed through the flow path 351 is the second intermediate member 3 in the integrated slit nozzle 1. And it can prevent leaking from between the 2nd seal members 5.

  In the slit nozzle 1, the first seal member 4 on the first intermediate member 2 side having the heating means 25 has a heat insulating member 41 as shown in FIG. 1. Specifically, as shown in FIG. 4, the first seal member 4 is a rectangular shape that is long in the Y direction when viewed from the surface facing the first member 6, and is a cross-sectional view in the Z direction. It is formed in a rectangular shape. In the slit nozzle 1, the outline of the outer shape of the first seal member 4 as viewed from the surface facing the first member 6 and the surface of the main body 22 of the first intermediate member 2 facing the first seal member 4. The outline of the outer shape in plan view coincides with the above. In the slit nozzle 1, a rectangular heat insulating member 41 that is long in the Y direction is disposed on the first seal member 4 in the central region of the surface facing the first member 6. More specifically, the first seal member 4 is formed with a concave portion recessed toward the first intermediate member 2 in a shape corresponding to the rectangular heat insulating member 41 in the central region of the surface facing the first member 6. The heat insulating member 41 is disposed in the recess. In the slit nozzle 1, the heat insulating member 41 is screwed with screws 42 at both ends in the longitudinal direction (Y direction). In the state where the heat insulating member 41 is disposed and fixed, each of the first seal member 4 and the surface facing the first member 6 and the surface facing the first intermediate member 2 are formed in a flat plane.

  As shown in FIGS. 1 and 4, the heat insulating member 41 of the first seal member 4 is located at a position corresponding to a region surrounded by the flow path 251 of the heating means 25 formed in the main body portion 22 of the first intermediate member 2. Is formed. From the viewpoint of enhancing the heat insulation effect, the heat insulating member 41 has an area larger than the area surrounded by the flow path 251 constituting the heating unit 25 and is disposed at a position covering the area surrounded by the flow path 251. Preferably it is.

  The heat insulation member 41 preferably has a thermal conductivity of 0.07 W / m · K or more and 0.8 W / m · K or less. As the heat insulating member 41, it is preferable to use a member in which a main material made of a borate binder or a silicate binder is arranged on a main base material made of glass fiber.

  As shown in FIGS. 1 and 4, the first seal member 4 is formed with a plurality of bolting through holes 43 that penetrate in the thickness direction (Z direction) along the outer periphery of the heat insulating member 41. A plurality of through holes 43 are formed at positions substantially coincident with the through holes 23 of the first intermediate member 2. The shape of each through-hole 43 is formed in a perfect circle shape in the slit nozzle 1 like the shape of the through-hole 23.

  Further, as shown in FIGS. 1 and 4, the first seal member 4 is located outside the heat insulating member 41 at a position corresponding to the start point 251 s of the flow path 251 constituting the heating means 25 of the first intermediate member 2. In addition, an introduction port 45s penetrating in the thickness direction (Z direction) and a lead-out port 45e penetrating in the thickness direction (Z direction) are formed at positions corresponding to the end point portion 251e of the flow path 251 of the first intermediate member 2. Has been. In the slit nozzle 1, the shapes of the inlet 45s and the outlet 45e are formed in a perfect circle shape. In addition, packing members over the entire circumference may be provided on the outer circumferences of the inlet 45s and the outlet 45e on the first member 6 side surface of the first seal member 4 from the viewpoint of preventing leakage. .

  Further, as shown in FIGS. 1 and 4, the first seal member 4 is arranged in the thickness direction (Z direction) at a position corresponding to the liquid supply port 26 of the first intermediate member 2 outside the heat insulating member 41. A penetrating liquid supply port 46 is formed. The liquid supply port 46 is formed in a circular shape having the same shape as the liquid supply port 26 of the first intermediate member 2. In addition, on the outer periphery of the liquid supply port 46 on the surface of the first seal member 4 on the first member 6 side, a packing member may be provided over the entire periphery from the viewpoint of preventing leakage.

  Next, in the slit nozzle 1, as shown in FIG. 5, the second seal member 5 on the second intermediate member 3 side having the heating means 35 also has a heat insulating member 51, similarly to the first seal member 4. ing. More specifically, as shown in FIG. 5, the second seal member 5 has a rectangular shape that is long in the Y direction when viewed from the surface facing the second member 7, as in the case of the first seal member 4. , Formed in a rectangular shape when viewed in cross-section in the Z direction. In the slit nozzle 1, the outline of the outer shape of the second seal member 5 in plan view from the surface facing the second member 7 and the surface of the main body 32 of the second intermediate member 3 facing the second seal member 5. The outline of the outline in plan view coincides with the outline of the outline of the first seal member 4. In the slit nozzle 1, a rectangular heat insulating member 51 that is long in the Y direction is disposed on the second seal member 5 in the center region of the surface facing the second member 7. More specifically, the second seal member 5 is formed with a recess recessed toward the second intermediate member 3 in a shape corresponding to the rectangular heat insulating member 51 in the central region of the surface facing the second member 7. The heat insulating member 51 is disposed in the recess. In the slit nozzle 1, the heat insulating member 51 is screwed with screws 52 at both ends in the longitudinal direction (Y direction). In the state where the heat insulating member 51 is disposed and fixed, each of the second seal member 5 and the surface facing the second member 7 and the surface facing the second intermediate member 3 are formed in a flat plane.

  As shown in FIG. 5, the heat insulating member 51 of the second seal member 5 is formed at a position corresponding to a region surrounded by the flow path 351 of the heating means 35 formed in the main body portion 32 of the second intermediate member 3. ing. From the viewpoint of enhancing the heat insulation effect, the heat insulating member 51 is arranged at a position where the area is wider than the area surrounded by the flow path 351 constituting the heating means 35 and covers the area surrounded by the flow path 351. Preferably it is. As the heat insulation member 51, the thing similar to the heat insulation member 41 of the 1st seal member 4 can be used.

  As shown in FIGS. 1 and 5, the second seal member 5 has a plurality of through-holes 53 for bolt tightening that penetrates in the thickness direction (Z direction) along the outer periphery of the heat insulating member 51. A plurality of through holes 53 are formed at positions substantially matching 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 second seal member 5 is located outside the heat insulating member 51 at a position corresponding to the start point 351 s of the flow path 351 constituting the heating means 35 of the second intermediate member 3. In addition, an introduction port 55s penetrating in the thickness direction (Z direction) and a lead-out port 55e penetrating in the thickness direction (Z direction) are formed at positions corresponding to the end point portion 351e of the flow path 351 of the second intermediate member 3. Has been. The inlet 55s and the outlet 55e are formed in a perfect circle shape in the slit nozzle 1. In addition, packing members over the entire circumference may be provided on the outer circumferences of the inlet 55s and the outlet 55e on the surface of the second seal member 5 on the second member 7 side from the viewpoint of preventing leakage. .

  As shown in FIG. 8, 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 in the multiple structure 30 are overlapped has a first deep bottom recess 241 and a second deep bottom of the first intermediate member 2. There is a liquid reservoir chamber 110 formed by combining the concave portion 242 and the third deep bottom concave portion 243 with each of the first deep bottom concave portion 341, the second deep bottom concave portion 342, and the third deep bottom concave portion 343 of the second intermediate member 3. Will be formed. A slit-like liquid flow path 12 formed by combining the shallow concave portion 212 of the first intermediate member 2 and the shallow concave portion 312 of the second intermediate member 3 is provided in the longitudinal direction (at the front end portion of the stacked body 20). (Y direction). As shown in FIG. 8, the liquid reservoir chamber 110 is formed in communication with the liquid supply port 26 of the first intermediate member 2, and the liquid flow path 12 is formed in communication with the liquid reservoir chamber 110. As shown in FIG. 8, the liquid supply port 26 of the first intermediate member 2 communicates with a liquid introduction port 66 of the first member 6 described later via a liquid supply port 46 of the first seal member 4. Become.

  As shown in FIGS. 1 and 6, the first member 6 that covers the multiple structure 30 from the first seal member 4 side is viewed in plan view from the surface facing the first intermediate member 2 (first seal member 4). In addition, the rectangular shape is long in the Y direction, covers the tip of the laminate 20 (tip 21 of the first intermediate member 2) in a cross-sectional view in the Z direction, and a sharp portion toward the liquid channel 12 It has a sharp portion 61 and a rectangular main body portion 62. The sharpened portion 61 protrudes in parallel with the Z direction from the smooth surface of the main body 62 facing the first intermediate member 2 (first seal member 4) toward the first intermediate member 2 (first seal member 4). Furthermore, the first intermediate member 2 protrudes so as to have an inclined surface 611 that uniformly inclines corresponding to the inclined surface 211 of the distal end portion 21. In the slit nozzle 1, the height of the sharpened portion 61 that protrudes in parallel with the Z direction from the main body portion 62 is substantially the same as the thickness of the first seal member 4. Further, a gap is formed between the first seal member 4 and a portion of the sharpened portion 61 that protrudes in parallel with the Z direction from the main body portion 62.

  An angle θ3 formed by the inclined surface 611 of the sharpened portion 61 of the first member 6 and the virtual surface IF1 parallel to the surface of the main body 62 facing the first intermediate member 2 (first seal member 4) (see FIG. 1). ) Is 105 ° or more, preferably 120 ° or more, and more preferably 135 ° or more, from the viewpoints of uniform spraying over a wide range, the strength of the nozzle tip, and adhesion of the spray liquid to the nozzle. 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 main body 62 of the first member 6 has an outer surface (a surface not facing the first intermediate member 2) formed in a flat plane, and the first intermediate member 2 (the first seal member 4). ) Is formed in the central region of the surface facing the outer surface). That is, the surface of the main body 62 that faces the first intermediate member 2 has a recess 64, and a region excluding the recess 64 is formed on a flat plane. As shown in FIGS. 1 and 6, the main body portion 62 of the first member 6 is for bolt tightening that penetrates in the thickness direction (Z direction) along the outer periphery of the concave portion 64 as shown in FIGS. 1 and 6. A plurality of through holes 63 are formed. A plurality of through holes 63 are formed at positions corresponding to the through holes 23 of the first intermediate member 2 and the through holes 43 of the first seal member 4. The shape of each through-hole 63 is formed in a perfect circle shape in the slit nozzle 1, similar to the shape of the through-holes 23 and 43.

  As shown in FIGS. 1 and 6, the main body portion 62 of the first member 6 penetrates in the thickness direction (Z direction) at a position corresponding to the introduction port 45 s of the first seal member 4 outside the recess 64. An inlet 65s that penetrates in the thickness direction (Z direction) is formed at a position corresponding to the outlet 45e of the first seal member 4. In the slit nozzle 1, the shape of the introduction port 65 s and the outlet port 65 e is formed in a perfect circle shape that is the same shape as the introduction port 45 s and the outlet port 45 e of the first seal member 4.

  As shown in FIGS. 1 and 6, the main body 62 of the first member 6 has a liquid supply port 26 of the first intermediate member 2 and a liquid supply port of the first seal member 4 outside the recess 64. A liquid supply port 66 penetrating in the thickness direction (Z direction) is formed at a position corresponding to 46. The liquid supply port 46 is formed in a circular shape having the same shape as the liquid supply port 26 of the first intermediate member 2 and the liquid supply port 46 of the first seal member 4.

  As shown in FIG. 6, the concave portion 64 of the first member 6 includes a first concave portion 641 having the deepest concave portion and a shallowest concave portion from the liquid supply port 66 side toward the sharpened portion 61. 2 recesses 642 and a third recess 643 having a deep recess are continuously provided. The first concave portion 641 has a smooth bottom surface and extends parallel to the longitudinal direction (Y direction) when viewed from the surface facing the first intermediate member 2 (first seal member 4). doing. On the bottom surface of the first recess 641, as shown in FIG. 6, 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 67 is formed. Further, the second recess 642 extends in parallel with the longitudinal direction (Y direction) when seen in a plan view from the side facing the first intermediate member 2. The third recess 643 extends in parallel to the longitudinal direction (Y direction) in a plan view from the surface facing the first intermediate member 2, and compared to the depth of the first recess 641. It is shallow. The bottom surfaces of the second recess 642 and the third recess 643 are formed smoothly.

  As shown in FIG. 6, the inclined surface 611 of the sharp portion 61 of the first member 6 has a bottom region as compared with the concave portion 64 extending from the concave portion 64 to the tip of the sharp portion 61 in the longitudinal direction (Y direction) central region. A shallow recess 612 having a very shallow depth is formed. The shallow recess 612 is formed in a rectangular shape along the longitudinal direction (Y direction). The shallow recess 612 is formed so as to include the shallow recess 212 corresponding to the position of the shallow recess 212 of the first intermediate member 2. The shallow recess 612 has a smooth bottom surface.

  Next, as shown in FIGS. 1 and 7, the second member 7 that covers the multiple structure 30 from the second seal member 5 side is from the side facing the second intermediate member 3 (second seal member 5). In a plan view, the shape is a rectangle that is long in the Y direction, and in a cross-sectional view in the Z direction, covers the distal end portion (the distal end portion 31 of the second intermediate member 3) of the stacked body 20 and sharpens toward the liquid flow path 12. A sharpened portion 71 having a large portion and a rectangular main body 72 are provided. In the slit nozzle 1, the outline of the second member 7 in plan view from the surface facing the second intermediate member 3 and the outer shape of the first member 6 in plan view from the surface facing the first intermediate member 2. Is consistent with the outline. The sharpened portion 71 bulges in parallel to the Z direction from the smooth surface of the main body 72 facing the second intermediate member 3 (second seal member 5) toward the second intermediate member 3 (second seal member 5). Further, the second intermediate member 3 protrudes so as to have an inclined surface 711 that uniformly inclines corresponding to the inclined surface 311 of the distal end portion 31. Note that the protruding height of the sharpened portion 71 that protrudes in parallel with the Z direction from the main body portion 72 is substantially the same as the thickness of the second seal member 5 in the slit nozzle 1. Further, a gap is formed between the second seal member 5 and a portion of the sharpened portion 71 that protrudes in parallel with the Z direction from the main body portion 72.

  An angle θ4 formed by the inclined surface 711 of the sharpened portion 71 of the second member 7 and the virtual surface IF2 parallel to the surface of the main body 72 facing the second intermediate member 3 (second seal member 5) (see FIG. 1). ) Is 105 ° or more, preferably 120 ° or more, and more preferably 135 ° or more, from the viewpoints of uniform spraying over a wide range, the strength of the nozzle tip, and adhesion of the spray liquid to the nozzle. 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 °.

  The main body 72 of the second member 7 has a flat outer surface (a surface not facing the second intermediate member 3) in the slit nozzle 1, and is formed on the second intermediate member 3 (second seal member 5). A concave portion 74 that is recessed toward the outer surface is formed in the central region of the opposing surface. That is, the surface of the main body 72 facing the second intermediate member 3 has a recess 74, and the region excluding the recess 74 is formed as a flat surface. As shown in FIGS. 1 and 7, the main body portion 72 of the second member 7 is for bolt tightening that penetrates in the thickness direction (Z direction) along the outer periphery of the recess 74, as shown in FIGS. 1 and 7. A plurality of through holes 73 are formed. A plurality of through holes 73 are formed at positions corresponding to the through holes 33 of the second intermediate member 3 and the through holes 53 of the second seal member 5. The shape of each through-hole 73 is formed in a perfect circle shape in the slit nozzle 1 like the shape of the through-holes 33 and 53.

  As shown in FIGS. 1 and 7, the main body 72 of the second member 7 penetrates in the thickness direction (Z direction) at a position corresponding to the introduction port 55 s of the second seal member 5 outside the recess 74. An introduction port 75s is formed, and a lead-out port 75e penetrating in the thickness direction (Z direction) is formed at a position corresponding to the lead-out port 55e of the second seal member 5. In the slit nozzle 1, the shape of the introduction port 75 s and the lead-out port 75 e is formed in a perfect circle shape that is the same shape as the introduction port 55 s and the lead-out port 55 e of the second seal member 5.

  As shown in FIGS. 1 and 7, the concave portion 74 of the second member 7 has a first concave portion 741 having the deepest concave portion and a second concave portion 742 having the shallowest concave portion toward the sharpened portion 71. And the third recess 743 having a deep recess is continuously provided. As shown in FIG. 7, the first recess 741, the second recess 742, and the third recess 743 of the second member 7 are respectively the first recess 641, the second recess 642, and the third recess 643 of the first member 6. It is provided corresponding to the formation position. The first recess 741 has a bottom surface that is smooth, and extends in parallel with the longitudinal direction (Y direction) when viewed from the side facing the second intermediate member 3 (second seal member 5). doing. On the bottom surface of the first recess 741, as shown in FIG. 7, 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 77 is formed. Further, the second recess 742 extends in parallel with the longitudinal direction (Y direction) in a plan view from the side facing the second intermediate member 3. The third recess 743 extends in parallel to the longitudinal direction (Y direction) in a plan view from the surface facing the second intermediate member 3, and compared to the depth of the first recess 741, It is shallow. The bottom surfaces of the second recess 742 and the third recess 743 are formed smoothly.

  As shown in FIG. 7, the inclined surface 711 of the sharp portion 71 of the second member 7 has a bottom region as compared with the concave portion 74 extending from the concave portion 74 to the tip of the sharp portion 71 in the central region in the longitudinal direction (Y direction). A shallow recess 712 having an extremely shallow depth is formed. In the slit nozzle 1, the shallow recess 712 is formed in a rectangular shape having the same shape and size as the shallow recess 612 of the first member 6 along the longitudinal direction (Y direction). The shallow recess 712 is formed so as to include the shallow recess 312 corresponding to the position of the shallow recess 312 of the second intermediate member 3. The shallow concave portion 712 has a smooth bottom surface.

  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 11 thereof, and as shown in FIG. The first gas flow path 13 is formed in the gap between the first member 6 and the first intermediate member 2, and the second gas flow path 14 is formed in the gap between the second member 7 and the second intermediate member 3. . Specifically, as shown in FIG. 1, the slit nozzle 1 includes a laminated body 20 composed of a first intermediate member 2 and a second intermediate member 3, and a first seal member 4 and a first intermediate member 2 from the first intermediate member 2 side. (2) A multiple structure 30 is formed by sandwiching the second seal member 5 from the intermediate member 3 side, and the multiple structure 30 is further moved from the first seal member 4 side to the first member 6 and from the second seal member 5 side to the second. By overlapping so as to cover with the member 7, bolts (not shown) are passed through the plurality of through holes 63, 43, 23, 33, 53, 73 and bolted with the bolts (not shown) and nuts (not shown). It is formed integrally. The slit nozzle 1 includes a plane facing the first member 6 in the first seal member 4 overlaid on the main body portion 22 of the first intermediate member 2, a first concave portion 641, a second concave portion 642 of the first member 6, and Each of the third recesses 643 is combined to form the first gas reservoir 121, the second gas reservoir 122, and the third gas reservoir 123 from the upstream side toward the tip of the sharpened portion 61. . Further, the gas passage 124 is formed in the gap between the first seal member 4 and the portion of the sharpened portion 61 of the first member 6 that protrudes in parallel with the Z direction from the main body portion 62. The slit nozzle 1 is combined with the inclined surface 211 of the distal end portion 21 of the first intermediate member 2 and the shallow concave portion 612 of the inclined surface 611 of the sharpened portion 61 of the first member 6 in the slit shape. The first gas flow path 13 is formed. As shown in FIG. 8, the first gas reservoir 121 is formed to communicate with the gas inlet 67 of the first member 6, and the third gas reservoir 123 includes the first gas reservoir 121 and the third gas. The first gas reservoir 121 communicates with the second gas reservoir 122 narrower than the interval between the reservoirs 123. The first gas channel 13 is formed in communication with the third gas reservoir 123 via the gas passage 124.

  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 overlapped with the main body portion 32 of the second intermediate member 3. In addition, the flat surface of the second seal member 5 that faces the second member 7 and the first recess 741, the second recess 742, and the third recess 743 of the second member 7 are combined, respectively, toward the tip from the upstream side. Thus, the first gas reservoir 131, the second gas reservoir 132, and the third gas reservoir 133 are formed. Further, the gas passage 134 is formed in the gap between the portion of the sharpened portion 71 of the second member 7 that protrudes in parallel with the Z direction from the main body 72 and the second seal member 5. The slit nozzle 1 is combined with the inclined surface 311 of the distal end portion 31 of the second intermediate member 3 and the shallow concave portion 712 of the inclined surface 711 of the sharpened portion 71 of the second member 7 at the distal end portion of the slit nozzle 1. The second gas flow path 14 is formed. As shown in FIG. 8, the first gas reservoir 131 is formed to communicate with the gas inlet 77 of the second member 7, and the third gas reservoir 133 includes the first gas reservoir 131 and the third gas. It communicates with the first gas reservoir 131 via the second gas reservoir 132 that is narrower than the interval between the reservoirs 133. The second gas channel 14 is formed in communication with the third gas reservoir 133 via the gas passage 134. The first gas reservoir 131, the second gas reservoir 132, and the third gas reservoir 133 formed on the second member 7 side, the first gas reservoir 121 formed on the first member 6 side, and the second gas As shown in FIG. 8, the reservoir 122 and the third gas reservoir 123 are 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. Yes.

  The slit nozzle 1 configured as described above will be described in detail. As shown in FIG. 9, 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. 9, 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. 10, when the front end portion 11 of the slit nozzle 1 is viewed from the front, the nozzles 12 e of the liquid channel 12 and the nozzles 12 e of the liquid channel 12 are arranged on both sides along the Y direction. The jet outlet 13e of the 1 gas flow path 13 and the jet outlet 14e of the 2nd gas flow path 14 are each extended in the longitudinal direction (Y direction). As described above, as shown in FIGS. 1 to 8, the shallow concave portion 612 of the first member 6 and the shallow concave portion 712 of the second member 7 correspond to the position of the shallow concave portion 212 of the first intermediate member 2 and the second portion. Corresponding to the position of the shallow bottom recess 312 of the intermediate member 3, the shallow bottom recesses 212, 312 are included. Therefore, when the front end portion 11 of the slit nozzle 1 is viewed from the front, the length in the longitudinal direction (Y direction) of the jet port 12e of the liquid channel 12 is the length of the jet port 13e of the first gas channel 13 and the second gas. Both ends of the outlet 13e of the first gas channel 13 and both ends of the outlet 14e of the second gas channel 14 are shorter than the length of the outlet 14e of the channel 14 in the longitudinal direction (Y direction). These are arranged outward in the longitudinal direction (Y direction) from both end portions of the ejection port 12e of the liquid channel 12.

  Furthermore, in the slit nozzle 1, the shallow recess 712 of the second member 7 is formed in the same shape and size as the shallow recess 612 of the first member 6. Therefore, as shown in FIG. 10, when the front end portion 11 of the slit nozzle 1 is viewed from the front, the length in the longitudinal direction (Y direction) of the ejection port 13 e of the first gas channel 13 and the second gas channel 14 The length of the jet port 14e in the longitudinal direction (Y direction) is the same.

  The length in the longitudinal direction (Y direction) of the rectangular ejection port 12e of the liquid channel 12 is the rectangular jet of the first gas channel 13 from the viewpoint of preventing the generation of coarse droplets and suppressing the amount of air used. The length in the longitudinal direction (Y direction) of the outlet 13e or the rectangular jet port 14e of the second gas channel 14 is preferably 70% or more, more preferably 80% or more. And it is preferably 95% or less, more preferably 90% or less. More specifically, it is preferably 70% or more and 95% or less, and more preferably 80% or more and 90% or less.

  The materials of the first intermediate member 2, the second intermediate member 3, the first seal member 4, the second seal member 5, the first member 6 and the second member 7 constituting the slit nozzle 1 are aluminum alloy and stainless steel. In addition to metals such as steel and titanium, ceramics, heat-resistant resins and the like can be used, and these can be appropriately selected and used depending on the application.

  As the liquid sprayed by the slit nozzle 1, various liquids can be used depending on the application. In particular, since the slit nozzle 1 has a heating means, a high-viscosity liquid that easily becomes solid at room temperature is used. You can also

  In addition, as the fluid passing through the flow paths 251 and 351, various fluids can be used according to the liquid to be sprayed, and specifically, water, oil, or the like can be used. The fluid heating temperature can be adjusted according to the liquid to be sprayed. The flow rate of the fluid passing through the flow paths 251 and 351 can be adjusted according to the liquid to be sprayed. Moreover, as gas used when spraying a liquid with the slit nozzle 1, various gas can be used according to the said liquid to spray.

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 supply path 66 of the slit nozzle 1, and a gas supply pipe (not shown) is connected to each of the gas inlet 67 and the gas inlet 77.
Here, as shown in FIG. 8, the liquid supplied from the liquid supply path 66 flows from the upstream side toward the downstream side (the tip portion 11 side), the liquid supply port 46, the liquid supply port 26, and the liquid reservoir 110. Then, the liquid flows in the order of the liquid flow path 12, and the liquid is ejected from the ejection port 12e of the liquid flow path 12.
In addition, as shown in FIG. 8, the gas supplied from the gas introduction port 67 flows from the upstream side toward the downstream side (tip portion 11 side), the first gas reservoir 121, the second gas reservoir 122, The gas flows in the order of the three gas reservoirs 123, the gas passage 124, and the first gas passage 13, and the gas is ejected from the outlet 13 e of the first gas passage 13.
In addition, as shown in FIG. 8, the gas supplied from the gas introduction port 77 flows from the upstream side toward the downstream side (tip portion 11 side), the first gas reservoir 131, the second gas reservoir 132, The gas flows in the order of the 3 gas reservoir 133, the gas passage 134, and the second gas passage 14, and the gas is ejected from the ejection port 14 e of the second gas passage 14.

  In the slit nozzle 1, as shown in FIG. 9, the extending direction of the first gas flow path 13 is an acute angle (crossing angle θ <b> 1) with respect to the extending direction of the liquid flow path 12 when the tip end portion 11 is viewed in cross section. 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). Further, as shown in FIG. 10, the first gas flow path 13 is formed along both sides of the rectangular ejection port 12 e of the liquid flow channel 12 and the ejection port 12 e of the liquid flow channel 12 when the front end portion 11 is viewed from the front. The jet port 13e and the jet port 14e of the second gas channel 14 each extend 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 collides, and the liquid can be atomized uniformly and sprayed.

  Moreover, in the slit nozzle 1, as shown in FIG. 8, the 1st intermediate member 2 and the 2nd intermediate member 3 which comprise the slit nozzle 1 have the heating means 25 and 35, respectively. Therefore, the liquid supplied into the liquid reservoir 110 formed between the first intermediate member 2 and the second intermediate member 3 can be heated by the heating means 25 and 35 incorporated in the slit nozzle 1. it can. Further, the first seal member 4 laminated on the first intermediate member 2 side having the heating means 25 has a heat insulating member 41, and the second seal member 5 laminated on the second intermediate member 3 side having the heating means 35. Has a heat insulating member 51. Therefore, even if the gas supplied from the gas inlets 67 and 77 flows through the first gas reservoirs 121 and 131, the second gas reservoirs 122 and 132, and the third gas reservoirs 123 and 133, the heating means The liquid in the liquid reservoir chamber 110 heated at 25 and 35 can be kept warm without being cooled, the liquid heating can be adjusted stably, and solidification of the sprayed liquid can be prevented. In the slit nozzle 1, as described above, since the heating means 25 and 35 and the heat insulating members 41 and 51 are built in the slit nozzle 1, the slit nozzle 1 can be manufactured at low cost, and the heating means 25 and 35 or the heat insulating members 41 and 51. Since only the member having the can be replaced, the maintainability is also improved.

  In the slit nozzle 1, as shown in FIG. 8, the heating means 25, 35 has a flow path 251 of the first intermediate member 2 and a flow path 351 of the second intermediate member 3. In the slit nozzle 1, a liquid supply pipe (not shown) that supplies fluid heated by a heater is connected to the inlets 65s and 75s of the slit nozzle 1, and the fluid is discharged to the outlets 65e and 75e of the slit nozzle 1. A liquid discharge pipe (not shown) is connected. Accordingly, the heated fluid supplied from the introduction ports 65s and 75s flows from the start point portions 251s and 351s of the flow paths 251 and 351 to the end point portions 251e and 351e of the flow paths 251 and 351 through the introduction ports 45s and 55s. It flows in the paths 251 and 351. The fluid that has flowed through the flow paths 251 and 351 is then discharged from the outlets 65e and 75e via the outlets 45e and 55e. As described above, since the fluid that is always heated flows in the flow paths 251 and 351, the liquid in the liquid reservoir 110 can be stably heated.

  As described above, in the slit nozzle 1, the heating means 25, 35 includes the flow path 251 of the first intermediate member 2 and the flow path 351 of the second intermediate member 3, and the heated fluid is supplied to the flow paths 251, 251. However, instead of this, a flow path 251, 351, and a heater heating wire disposed in the flow path 251, 351 and heated by the heater may be provided.

  In the slit nozzle 1, as shown in FIG. 8, the flow paths 251 and 351 constituting the heating means 25 and 35 are liquid reservoirs formed between the first intermediate member 2 and the second intermediate member 3. It is arranged at a position corresponding to the chamber 110. Therefore, the liquid supplied into the liquid reservoir 110 can be efficiently heated by the heating means 25 and 35 built in the slit nozzle 1.

  Further, in the slit nozzle 1, as shown in FIG. 8, a plurality of flow paths 251, 351 constituting the heating means 25, 35 are formed by being folded back into a region corresponding to the liquid reservoir chamber 110. Therefore, the liquid supplied into the liquid reservoir 110 can be efficiently heated by the heating means 25 and 35.

  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. 8, the first intermediate member 2 and the second intermediate member 3 constituting the slit nozzle 1 have heating means 25 and 35, respectively. It is sufficient that at least one of the first intermediate member 2 and the second intermediate member 3 has a heating means. Thus, when at least one of the 1st intermediate member 2 and the 2nd intermediate member 3 has a heating means, the 1st seal member 4 by the side of the 1st intermediate member 2 which has a heating means, or the 2nd intermediate member 3 side. Or the 2nd seal member 5 should just have a heat insulation member.

  Moreover, in the slit nozzle 1 of the above-mentioned embodiment, as shown in FIG. 8, the flow paths 251 and 351 constituting the heating means 25 and 35 are provided between the first intermediate member 2 and the second intermediate member 3. Although it is arranged at a position corresponding to the liquid reservoir chamber 110 to be formed, it may not be arranged corresponding to the liquid reservoir chamber 110.

  Further, in the slit nozzle 1 of the above-described embodiment, as shown in FIG. 9, the intersecting 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. Further, as shown in FIG. 10, the jet outlet 13e of the first gas flow path 13 and the jet outlet 14e of the second gas flow path 14 have the same shape and the same length in the longitudinal direction (Y direction). Although formed, they need not be the same.

  Moreover, in the slit nozzle 1 of the above-described embodiment, as shown in FIG. 8, the liquid reservoir chamber 110 has the first deep bottom concave portion 241, the second deep bottom concave portion 242, and the third deep bottom of the first intermediate member 2. The concave portion 243 is formed by combining the first deep bottom concave portion 341, the second deep bottom concave portion 342, and the third deep bottom concave portion 343 of the second intermediate member 3. A surface facing the member 3 may be provided with a recess, and a surface facing the first intermediate member 2 of the second intermediate member 3 may be formed as a flat surface, or a surface facing the second intermediate member 3 of the first intermediate member 2 May be formed by providing a recess on the surface of the second intermediate member 3 facing the first intermediate member 2. Further, the shape of the recesses 24 and 34 may be other shapes.

  In the slit nozzle 1 of the above-described embodiment, as shown in FIGS. 6 and 8, the first gas reservoir 121, the second gas reservoir 122, and the third gas reservoir 123 are provided in the first seal member 4. The flat surface facing the first member 6 and the first concave portion 641, the second concave portion 642, and the third concave portion 643 of the first member 6 are formed in combination, but the shape of the concave portion 64 of the first member 6 However, the first gas reservoir 121, the second gas reservoir 122, and the third gas reservoir 123 may be omitted. The first gas reservoir 131, the second gas reservoir 132, and the third gas reservoir 133 are the same as the first gas reservoir 121, the second gas reservoir 122, and the third gas reservoir 123.

  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 laminate composed of a pair of vertically long first intermediate member and second intermediate member is sandwiched between the first seal member on the first intermediate member side and the second seal member on the second intermediate member side, and further, A slit nozzle integrated with a first member on the first seal member side and a second member on the second seal member side,
At least one of the first intermediate member and the second intermediate member has a heating means,
The first seal member or the second seal member on the first intermediate member side or the second intermediate member side having the heating means has a heat insulating member,
At the tip of the slit nozzle, a liquid channel is formed in the gap between the first intermediate member and the second intermediate member, and a first gas channel 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 of the slit nozzle is viewed from the front, the outlet of the liquid channel, the outlet of the first gas channel disposed on both sides of the outlet of the liquid channel, and the second gas channel Slit nozzles each having a jet port extending in the longitudinal direction.
<2>
In the laminated body in which the first intermediate member and the second intermediate member are overlapped, the first deep bottom concave portion, the second deep bottom concave portion, and the third deep bottom concave portion of the first intermediate member, and the second intermediate member first A liquid reservoir chamber is formed by combining each of the first deep recess, the second deep recess, and the third deep recess, and a shallow recess of the first intermediate member and a second recess are formed at the tip of the laminate. The slit nozzle according to <1>, wherein a slit-like liquid flow path formed by combining the shallow concave portion of the intermediate member extends in the longitudinal direction (Y direction).
<3>
The concave portion of the first intermediate member has a first deep bottom concave portion, a second deep bottom concave portion, so that the depth of the bottom gradually decreases from the position of the liquid supply port of the first intermediate member toward the tip portion. The slit nozzle as described in <1> or <2> which has a 3rd deep bottom recessed part continuously.
<4>
The concave portion of the second intermediate member has a first deep concave portion and a second deep bottom so that the depth of the bottom gradually decreases from the position corresponding to the liquid supply port of the first intermediate member toward the tip portion. The slit nozzle of any one of <1>-<3> which has a recessed part and a 3rd deep bottom recessed part continuously.
<5>
In the front end portion of the first intermediate member, a shallow concave portion is formed in the central region in the longitudinal direction (Y direction) from the concave portion to the front end of the front end portion. The bottom recess is the slit nozzle according to any one of <1> to <4>, which is formed along the longitudinal direction (Y direction) in a plan view from the side facing the second intermediate member.
<6>
In the front end portion of the second intermediate member, a shallow concave portion is formed in the central region in the longitudinal direction (Y direction) from the concave portion to the front end of the front end portion. The bottom recess is the slit nozzle according to any one of <1> to <5>, which is formed along the longitudinal direction (Y direction) in a plan view from the side facing the first intermediate member.
<7>
The first intermediate member has a rectangular shape that is long in the Y direction in plan view from the side facing the second intermediate member, and has a triangular tip and a rectangular main body in cross section in the Z direction. The tip portion has an inclined surface that inclines smoothly from the surface side facing the first member toward the surface side facing the second intermediate member. And an angle θ1 formed with 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, more specifically 15 ° or more and 75 ° or less, preferably 20 ° or more and 60 ° or less, more preferably 22.5 ° or more and 45 ° or less. The slit nozzle according to any one of <1> to <6>.
<8>
The second intermediate member has a rectangular shape that is long in the Y direction when viewed from the side facing the first intermediate member, and has a triangular tip and a rectangular main body when viewed in cross section in the Z direction. The tip has an inclined surface that smoothly inclines from the surface facing the second member toward the surface facing the first intermediate member. And an angle θ2 formed with 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, more specifically 15 ° or more and 75 ° or less, preferably 20 ° or more and 60 ° or less, more preferably 22.5 ° or more and 45 ° or less. The slit nozzle according to any one of <1> to <7>.
<9>
The concave portion of the first member includes a first concave portion having a deepest concave portion, a second concave portion having a shallowest concave portion, and a third concave portion having a deepest concave portion from the liquid supply port side toward the sharp portion. The slit nozzle of any one of <1>-<8> which has a recessed part continuously.
<10>
On the inclined surface of the sharp part of the first member, a shallow concave part is formed in the central region in the longitudinal direction (Y direction), which has a very shallow bottom compared to the concave part from the concave part to the tip of the sharp part. The shallow bottom recess is formed in a rectangular shape along the longitudinal direction (Y direction), and is formed so as to include the shallow bottom recess corresponding to the position of the shallow recess of the first intermediate member < The slit nozzle according to any one of 1> to <9>.
<11>
The concave portion of the second member is formed by continuously connecting the first concave portion having the deepest concave portion, the second concave portion having the shallowest concave portion, and the third concave portion having the deepest concave portion toward the sharpened portion. The slit nozzle according to any one of <1> to <10>.
<12>
On the inclined surface of the sharp part of the second member, a shallow concave part is formed in the central region in the longitudinal direction (Y direction), which has a very shallow bottom compared to the concave part, extending from the concave part to the tip of the sharp part. The shallow recess is formed in a rectangular shape having the same shape and size as the shallow recess of the first member along the longitudinal direction (Y direction), and corresponds to the position of the shallow recess of the second intermediate member. The slit nozzle according to any one of <1> to <11>, which is formed so as to include a shallow concave portion.
<13>
The angle θ3 formed by the inclined surface of the sharp part of the first member and the virtual surface parallel to the surface facing the first intermediate member (first seal member) in the main body 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, more preferably 135 ° or more and 157.5 ° or less. In the slit nozzle, the inclination angle θ3 is formed to be the same as the angle obtained by subtracting the angle θ1 formed by the first intermediate member from 180 °. The slit nozzle according to any one of <1> to <12>.
<14>
The angle θ4 formed by the inclined surface of the sharp part of the second member and the virtual surface parallel to the surface facing the second intermediate member (second seal member) in the main body 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, more preferably 135 ° or more and 157.5 ° or less. In the slit nozzle, the inclination angle θ4 is formed to be the same as the angle obtained by subtracting the angle θ2 formed by the second intermediate member from 180 °. The slit nozzle according to any one of <1> to <13>.
<15>
The heating means includes a flow path provided on a surface of the first intermediate member on the first seal member side or on a surface of the second intermediate member on the second seal member side. The slit nozzle according to any one of 14>.
<16>
The slit nozzle according to <15>, wherein the flow path constituting the heating unit is disposed at a position corresponding to a liquid reservoir chamber formed between the first intermediate member and the second intermediate member.
<17>
<15> or <16> The slit nozzle according to <15> or <16>, wherein the flow path constituting the heating means is formed by being folded back multiple times in a region corresponding to the liquid reservoir chamber.
<18>
The area of the heat insulating member is larger than the area surrounded by the flow path constituting the heating means, and is arranged at a position covering the area surrounded by the flow path <1> to <17>. A slit nozzle according to any one of the above.
<19>
The heat insulating member is the slit nozzle according to any one of <1> to <18>, in which the thermal conductivity is 0.07 W / m · K or more and 0.8 W / m · K or less.
<20>
The slit nozzle according to any one of <1> to <19>, wherein the heat insulating member uses a member in which a main material made of a borate binder or a silicate binder is arranged on a main base material made of glass fiber. .
<21>
The heating means includes a flow path provided on a surface of the first intermediate member on the first seal member side or a surface of the second intermediate member on the second seal member side, and a heater disposed on the flow path. The slit nozzle according to any one of <1> to <20>, which has a heater heating wire heated by.
<22>
The slit nozzle according to any one of <1> to <21>, wherein the heater is a cartridge heater.

  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 crossing angle between the extending direction of the liquid flow path 12 and the extending direction of the first gas flow path 13 is θ1, and the liquid flow and the gas flow are merged. Since the tip end portion 31 of the second intermediate member 3 is formed at an angle θ2, the crossing angle between the extending direction of the liquid channel 12 and the extending direction of the second gas channel 14 is θ2, and the liquid flow And the gas flow merge. The angle θ1 formed by the distal end portion of the first intermediate member 2 was 45 °, and the angle θ2 formed by the distal end portion of the second intermediate member 3 was also 45 °. Further, the inclination angle θ3 of the inclined surface of the first member 6 was 135 °, and the inclination angle θ4 of the inclined surface of the second member 7 was also 135 °. The jet port 12e of the liquid channel 12 had a length in the Y direction of 90 mm. Next, the jet outlet 13e of the first gas flow path 13 and the jet outlet 14e of the second gas flow path 14 each had a length in the Y direction of 100 mm. As the heat insulating members 41 and 51, members having a thermal conductivity of 0.08 W / m · K and a main material made of a silicate binder on a main base material made of glass fiber were used. In addition, water heated to 60 ° C. was used as a fluid flowing in the flow paths 251 and 351. The flow rate of water flowing in the flow paths 251 and 351 was 0.3 L / min.

[Performance evaluation]
Regarding the spray nozzle of Example 1, it was evaluated whether or not solidification of the sprayed liquid could be prevented even when a highly viscous liquid that solidifies at room temperature was used. As the liquid to be sprayed, an aqueous solution containing 70% by mass of sodium lauryl sulfate as a main component was used. The viscosity of the aqueous solution at 60 ° C. was 7,750 mPa · s. The gas used was air. Next, the slit nozzle of Example 1 is installed so that the tip portion is in the horizontal direction, and the liquid is discharged from the ejection port 12e of the liquid flow path 12, and the liquid discharge pressure at that time is measured with a liquid pressure gauge. And measured. The measured pressure was 0.37 MPa. Next, after the aqueous solution was left in the liquid reservoir 110 for 1 hour, the liquid was discharged from the jet 12e of the liquid channel 12, and the liquid discharge pressure at that time was measured. The measured pressure was 0.37 MPa.

From the above measurement results, in the slit nozzle of Example 1, the aqueous solution does not solidify in the liquid reservoir 110 and the liquid discharge pressure does not change even after the aqueous solution is left in the liquid reservoir 110 for 1 hour. I understood that. By using the slit nozzle of Example 1 as described above, the liquid in the heated liquid reservoir 110 can be kept warm without being cooled even when a high-viscosity liquid that solidifies at room temperature is used. It can be performed stably and can be expected to prevent solidification of the sprayed liquid.
[Performance evaluation 2]
Regarding the spray nozzle of Example 1, the suppression effect of the temperature drop of the liquid flow path by having arrange | positioned the heat insulation member was evaluated. The gas flow rate was set to 250 NL / min without discharging the liquid. The other conditions were that the liquid was ejected from the ejection port 12e of the liquid channel 12 under the same conditions as in Example 1 and performance evaluation. Thereafter, the discharge was stopped, and the temperature change due to the aging of the first intermediate member constituting the liquid reservoir 110 was measured. FIG. 11 is a plot of the obtained results. Moreover, the heat insulation member was removed from the spray nozzle of Example 1, and the liquid was discharged from the jet outlet of the liquid flow path on the same conditions using the spray nozzle from which the heat insulation member was removed. Thereafter, the discharge was stopped, the temperature change due to the change over time of the first intermediate member constituting the liquid reservoir was measured, and the obtained results were plotted in FIG. From the result of FIG. 11, it was found that the temperature decrease in the liquid flow path was suppressed by arranging the heat insulating member.

DESCRIPTION OF SYMBOLS 1 Slit nozzle 11 Front-end | tip part 12 Liquid flow path 12e Outlet 13 1st gas flow path 13e Outlet 14 Second gas flow path 14e Outlet 20 Laminated body 30 Multiple structure 2 1st intermediate member 21 End part 211 Inclined surface 212 Shallow bottom recess 22 Body portion 23 Through-hole 24 Recess 241 First deep bottom recess 241a T-shaped horizontal bar portion, 241b T-shaped vertical bar portion 242 Second deep bottom recess 243 Third deep bottom recess 25 Heating means 251 Channel 252 Packing member 26 Liquid supply port 3 Second intermediate member 31 Tip 311 Inclined surface 312 Shallow recess 32 Main body 33 Through hole 34 Recess 341 First deep recess 341a T-shaped horizontal bar portion, 341b T Character-shaped vertical bar portion 342 Second deep bottom recess 343 Third deep bottom recess 35 Heating means 351 Flow path 352 Packing member 4 First sheet Member 41 Heat insulating member 42 Screw 43 Through hole 45s Inlet port, 45e Outlet port 46 Liquid supply port 5 Second seal member 51 Heat insulating member 52 Screw 53 Through hole 55s Inlet port, 55e Outlet port 56 Liquid supply port 6 First member 61 Sharp Portion 611 Inclined surface 612 Shallow bottom recess 62 Body portion 63 Through hole 64 Recess 641 First recess 642 Second recess 643 Third recess 65s Inlet, 65e Outlet 66 Liquid inlet 67 Gas inlet 7 Second member 71 Sharp portion 711 Inclined surface 712 Shallow bottom recess 72 Body portion 73 Through hole 74 Recess 741 First recess 742 Second recess 743 Third recess 75s Inlet, 75e Outlet 77 Gas inlet 110 Liquid reservoir 121 First gas reservoir, 122 Second gas reservoir, 123 Third gas reservoir, 124 Gas passage 131 First gas reservoir, 132 Second gas reservoir 133 third gas reservoir, 135 gas passage

Claims (7)

A laminate composed of a pair of vertically long first intermediate member and second intermediate member is sandwiched between the first seal member on the first intermediate member side and the second seal member on the second intermediate member side, and further, A slit nozzle integrated with a first member on the first seal member side and a second member on the second seal member side,
At least one of the first intermediate member and the second intermediate member has a heating means,
The first seal member or the second seal member on the first intermediate member side or the second intermediate member side having the heating means has a heat insulating member,
At the tip of the slit nozzle, a liquid channel is formed in the gap between the first intermediate member and the second intermediate member, and a first gas channel 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 of the slit nozzle is viewed from the front, the outlet of the liquid channel, the outlet of the first gas channel disposed on both sides of the outlet of the liquid channel, and the second gas channel Slit nozzles each having a jet port extending in the longitudinal direction.   The said heating means has the flow path provided in the surface by the side of the said 1st seal member of the said 1st intermediate member, or the surface by the side of the said 2nd seal member of the said 2nd intermediate member. Slit nozzle.   The slit nozzle according to claim 2, wherein the flow path constituting the heating unit is disposed at a position corresponding to a liquid reservoir chamber formed between the first intermediate member and the second intermediate member.   The slit nozzle according to claim 3, wherein the flow path constituting the heating unit is formed by being folded back multiple times in a region corresponding to the liquid reservoir.   5. The heat insulating member according to claim 1, wherein an area of the heat insulating member is larger than an area surrounded by the flow path constituting the heating unit, and is disposed at a position covering the area surrounded by the flow path. A slit nozzle according to claim 1.   The heating means includes a flow path provided on a surface of the first intermediate member on the first seal member side or a surface of the second intermediate member on the second seal member side, and a heater disposed on the flow path. The slit nozzle of any one of Claims 1-5 which has a heating wire for heaters heated by.   The slit nozzle according to any one of claims 1 to 6, wherein the heater is a cartridge heater.

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