JP2006122733A - Nozzle apparatus for spraying fluid spray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To spray various kinds of fluids as a fine mist with an equal mist diameter not depending on a pressure and an amount of air by compression air and to make a noise at spraying as small as possible. <P>SOLUTION: The nozzle apparatus for spraying fluid spray is provided with an air pressure transferring pipe 4, provided with a nozzle 2 for jetting the air pressure at a distal end, and a fluid transferring pipe 7 provided with a fluid jetting part 5 by a porous material obtained by forming a spraying pore P by sintering particulates made of metal or non-metal at a distal end. The fluid jetting part 5 is arranged at an inner side of the nozzle 2. The fluid jetting part 5 is formed, for example, by ceramics grain aggregates solidified/produced by bonding between the non-metal particulate when the substance obtained by pressurizing/molding the non-metal particulate is subjected to heat treatment at a temperature of melting point or lower. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a spray nozzle for fluid sprays used as a sprayer for various fluids such as spray nozzles for release agents, lubricants, grease, etc., or fuel supply nozzles for gasoline, petroleum, etc., and other nozzles for engine combustors. It relates to the device.

Conventionally, for example, a viscous fluid sprayer such as a release agent has a configuration in which a pneumatic transfer pipe and a fluid transfer pipe are connected to a mixing chamber having a fluid ejection portion at one end. In use, compressed air and viscous fluid are respectively sent into a mixing chamber by a pneumatic transfer pipe and a fluid transfer pipe, and both are stirred and mixed in the mixing chamber to be sprayed, and then ejected to the outside by a fluid ejection section. ing. At this time, the mist particle size of the fluid in the spray state is proportional to the pressure, the air volume, etc. in the mixing chamber. For example, when the pressure is large, the mist particle size becomes small.
nothing special

  However, in the above-described conventional sprayer, when the pressure, air volume, etc. due to the compressed air in the mixing chamber are small, the adhesive force of the fluid is larger than the stirring and decomposing force due to the compressed air. Further, mixing of compressed air and fluid becomes insufficient, and the mist diameter of the fluid becomes extremely large. On the other hand, if the pressure, air volume, etc. by the compressed air at the time of spraying are increased in order to reduce the mist diameter, the noise is increased.

  Therefore, the present invention was created in view of the existing circumstances as described above, and it is possible to make various fluids fine and reduce the mist diameter regardless of the adjustment of pressure, air volume, etc. by compressed air. An object of the present invention is to provide a nozzle device for fluid spray spraying that can minimize noise during spraying.

In order to solve the above-described problem, in the present invention, a spray hole P is formed by sintering a pneumatic transfer pipe 4 having a nozzle 2 for ejecting pneumatic pressure at the tip, and metal or non-metallic particles. The fluid spraying nozzle device 1 is provided with a fluid transfer pipe 7 having a fluid ejection portion 5 made of a porous material at the tip, and the fluid ejection portion 5 is arranged inside the nozzle 2.
The nozzle 2 of the pneumatic transfer pipe 4 has a trumpet shape, and the fluid ejection portion 5 is arranged in a narrow inner portion 11 inside the nozzle 2 outlet. It is configured by arranging the fluid ejection part 5 in the narrow throat space.
The fluid ejection part 5 is formed of a ceramic particle aggregate formed by solidifying by bonding between nonmetallic particles when a non-metallic particle formed by pressure molding is heat-treated at a temperature below the melting point. it can.
The fluid ejection part 5 can be formed such that its outer shape is any one of a cylindrical shape, a spherical shape, an elliptical shape, a conical shape, and a polygonal shape.

In the fluid spray spray nozzle device 1 according to the present invention configured as described above, the fluid ejection portion 5 in which the spray hole P is formed by the porous material at the tip of the fluid transfer pipe 7 is pneumatically transferred. When air is ejected from the nozzle 2 for ejecting pneumatic pressure by the air pressure from the pipe 4, the fluid ejection part 5 is brought into a negative pressure state by the air flow rate from the pneumatic transfer pipe 4 to the nozzle 2. These fluids are ejected from the fluid ejection part 5 with a fine and equivalent mist diameter, and the fluid misted from the nozzles 2 by stirring and mixing with the air in the nozzles 2 is sprayed outward. Let
The fluid ejection part 5 disposed in the narrow back part 11 of the trumpet-shaped nozzle 2 accelerates the air flow velocity from the pneumatic transfer pipe 4 at the back part 11, and a cross section from the back part 11 to the jet outlet of the nozzle 2. The air is further accelerated by the expansion of the air, and the negative pressure effect on the inside of the fluid ejection portion 5 is improved, and the amount of spray from the ejection port of the nozzle 2 is increased.
The fluid ejecting portion 5 formed by the ceramic particle aggregate sprays various fluids through the spray holes P formed between the individual particles of the ceramic grain aggregate with a fine and equivalent mist diameter. Let
The fluid ejecting portion 5 having an outer shape formed in a columnar shape, a spherical shape, an elliptical shape, a conical shape, or a polygonal shape has any one of a cylindrical shape, a spherical shape, an elliptical shape, a conical shape, or a polygonal shape. The fluid ejection part 5 is made changeable in accordance with the shape of the nozzle 2 due to the above.

  According to the present invention, various fluids are made fine regardless of adjustment of pressure, air volume, etc. by compressed air, and sprayed with a mist diameter equivalent to this, as well as noise caused by compressed air during spraying, etc. It can be made as small as possible.

  That is, the present invention is a fluid ejection by a porous material formed by forming a spray hole P by sintering a pneumatic transfer pipe 4 having a nozzle 2 for pneumatic ejection at its tip and sintering of metal or non-metallic particles. This is because the fluid ejection pipe 5 is provided with a fluid transfer pipe 7 having a tip 5 at the tip, and the fluid ejection part 5 is arranged inside the nozzle 2, so that the pressure is about one-third that of conventional compressed air.・ Even with the air volume, the fluid is sprayed through the fluid ejection part 5 made of a porous material, so that it is possible to spray a viscous fluid with a fine and equivalent mist diameter, and only about one third of the pressure and air volume are sufficient. Therefore, the noise during spraying is minimized.

  The nozzle 2 of the pneumatic transfer pipe 4 has a trumpet shape, and the fluid ejection portion 5 is arranged in a narrow inner portion 11 inside the ejection port of the nozzle 2, so that the opening diameter of the nozzle 2 is increased. It is possible to increase the application area or supply amount of the surface to be sprayed by spraying various mists of various fluids.

  Since the fluid ejection part 5 is formed of a ceramic particle aggregate that is generated by solidifying by bonding between nonmetallic particles when heat-treated at a temperature equal to or lower than the melting point of non-metallic particles. Through the spray holes P formed between the individual particles of the ceramic particle aggregate, various fluids can be sprayed with a fine mist diameter equivalent to that of the spray holes P. Moreover, the size of the mist diameter can be arbitrarily set by arbitrarily setting the size of each particle size forming the ceramic particle aggregate in the range of, for example, 0.2 mm and 0.5 mm by controlling the heat treatment temperature. Can be changed. Moreover, by making the ceramics itself oleophilic and hydrophilic by selecting the material, it is possible to prevent the spray holes P from being clogged by the adhesion of oil, and to easily separate the infiltrated fluid. it can.

  Since the outer shape of the fluid ejection part 5 is formed in any one of a cylindrical shape, a spherical shape, an elliptical shape, a conical shape, and a polygonal shape, the outer shape is a cylindrical shape, a spherical shape, an elliptical shape, a conical shape, and a polygonal shape. The fluid ejecting unit can be changed in accordance with the shape of the nozzle 2 according to any of the shapes.

  Note that the reference numerals added in the means for solving the above-described problems and the effects of the invention are given for easy reference to the parts showing the components shown in the drawings. The present invention is not limited to the structure / shape indicated by the reference numeral.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the figure denotes, for example, a sprayer of various fluids having high concentrations such as a release agent, a lubricant, and grease, Or it is a nozzle device for fluid spray spraying used as a sprayer of the free flowing low viscosity fluid, such as gasoline, petroleum, and water. The fluid spray spray nozzle device 1 includes, for example, a large-diameter L-shaped pneumatic transfer pipe 4 formed by attaching a cylindrical nozzle 2 for pneumatic ejection made of, for example, an oleophobic material to a tip thereof via a screw tightening ring 3; A small-diameter straight tubular fluid in which, for example, a cylindrical fluid ejection portion 5 is screwed into the tip via a screw cap portion 6 made of a porous material in which spray holes P are formed by sintering metallic or non-metallic particles. And a transfer pipe 7.

  That is, in the pneumatic transfer pipe 4 connected to the compressed pneumatic pressure source not shown, for example, the fluid source not shown in the drawing along the horizontal portion of the pneumatic transfer pipe 4 from the back side of the portion bent in an L shape, for example. The fluid transfer pipe 7 connected to the nozzle is inserted, and the fluid ejection part 5 at the tip of the fluid transfer pipe 7 is arranged at a position inside the jet outlet of the nozzle 2 at the tip of the pneumatic transfer pipe 4.

  Further, the outer shape of the fluid ejection portion 5 is formed in a substantially cylindrical shape corresponding to the cylindrical shape of the nozzle 2, but is not limited thereto, and any of a hollow spherical shape, an elliptical shape, a conical shape, and a polygonal shape is used. The outer shape may be formed in any one of a substantially spherical shape, a substantially elliptical shape, a substantially conical shape, a substantially polygonal shape, etc.

  As a specific configuration of the fluid ejecting portion 5, for example, the surface energy is reduced when a non-metallic particle of ceramics having an oleophilic property / hydrophilic property is pressure-formed and heat-treated at a temperature below the melting point. It is formed by utilizing the bond between non-metallic particles in the direction, and extremely small spray holes P are formed between individual particles of the ceramic particle aggregate when solidified by such adhesion. Is. By passing various fluids through the spray hole P, a spray of the fluid with a fine mist diameter equivalent to the diameter of the spray hole P is formed. For example, the size of the mist diameter can be arbitrarily set by arbitrarily setting the size of each particle size forming the ceramic particle aggregate in the range of 0.2 mm and 0.5 mm, for example, by controlling the heat treatment temperature. Of course, when the spray diameter is formed as a predetermined one, it is not limited to these.

  Next, the operation of use according to the above configuration will be described. First, air is ejected from the pneumatic ejection nozzle 2 through the pneumatic transfer pipe 4. At this time, the inside of the fluid ejection part 5 is in a negative pressure state by the air flow velocity from the pneumatic transfer pipe 4 to the nozzle 2. Then, when various fluids are transferred through the fluid transfer pipe 7 to the fluid ejection part 5 made of the porous material at the tip, the fluid has a fine and equivalent mist diameter from the fluid ejection part 5 due to the air flow rate of the pneumatic transfer pipe 4. The fluid is sprayed outward from the nozzle 2 by jetting and stirring and mixing with the air in the nozzle 2. Various fluids can be sprayed regardless of the presence or absence of viscosity or the magnitude of viscosity.

  FIG. 2 shows another example of the present embodiment. In this case, the nozzle 2 of the pneumatic transfer pipe 4 is formed in a so-called laval nozzle type having a substantially trumpet shape. The fluid ejecting portion 5 is arranged in a narrow throat space portion of the inner portion 11 having a substantially neck shape on the inner inner side of the nozzle 2.

  Specifically, on the base housing 12 whose rear opening side is expanded in a skirt shape, a screw cylinder portion 13 formed on the back portion (throat space portion) 11 side of the Laval nozzle 2 is interposed via an O-ring 14. Screwed in. At this time, an annular gap 15 is formed between the small-diameter cylindrical back portion 11 on the inner back side of the screw tube portion 13 and the narrow-diameter opening side of the base housing 12, and is arranged on the side surface of the screw tube portion 13. The provided pneumatic transfer pipe 4 communicates with the gap 15.

  In addition, an arcuate curved portion 16 is formed on the inner peripheral surface of the throat space 11 facing the gap 15, and the pneumatic flow velocity fed from the pneumatic transfer pipe 4 follows the curved portion 16. The Counder effect can be obtained by flowing. The base housing 12 can be provided with a swinging mechanism (not shown), whereby the nozzle 2 itself can be freely directed in any direction, and can be sprayed evenly on the spray target. It is like that.

  Further, a fluid transfer tube 7 is inserted between the curved portion 16 and the back portion 11 and is connected to the tip of the fluid transfer tube 7 so as to be positioned at the approximate center of the back portion 11. The inner casing 17 is disposed with the opening side of the inner casing 17 facing the nozzle 2 outlet. For example, a cylindrical fluid ejection portion 5 made of a porous material formed by forming a spray hole P by sintering metal or non-metallic particles is fitted to the opening side of the inner housing 17. It should be noted that the internal casing 17 may be provided with a swing mechanism (not shown) so that the fluid ejection part 5 itself is freely directed in an arbitrary direction.

  Next, the operation of using the configuration according to the present embodiment will be described. First, air is ejected from the pneumatic ejection nozzle 2 through the pneumatic transfer pipe 4. At this time, the air flow velocity from the pneumatic transfer pipe 4 is accelerated at the back portion 11 through the curved portion 16, and the air flow velocity is further accelerated by the expansion of the air due to the wide cross section from the back portion 11 to the nozzle 2 ejection port. . Then, when various fluids are transferred through the fluid transfer pipe 7 to the fluid jetting part 5 made of the porous material at the tip, the fluid has a fine and equivalent mist diameter from the fluid jetting part 5 due to the air flow rate of the pneumatic transfer pipe 4. As a result of the stirring and mixing with the air in the nozzle 2, the fluid that has been misted outward over a wide area is uniformly sprayed from the expanded pneumatic outlet of the nozzle 2.

It is sectional drawing which shows the best form for implementing this invention. It is sectional drawing of the use condition which shows the other example of this Embodiment.

Explanation of symbols

P ... Spray hole 1 ... Fluid spray spray nozzle device 2 ... Nozzle 3 ... Screw tightening ring 4 ... Pneumatic transfer pipe 5 ... Fluid ejection part 6 ... Screw cap part 7 ... Fluid transfer pipe 11 ... Back part 12 ... Base housing 13 ... Screw cylinder part 14 ... O-ring 15 ... Gap 16 ... Bending part 17 ... Internal housing

Claims (4)

  A pneumatic transfer pipe having a nozzle for pneumatic ejection at the tip, and a fluid transfer pipe having a fluid jet portion made of a porous material formed by spraying a metal or non-metal particle to form a spray hole at the tip. A fluid spray spray nozzle device comprising: the fluid ejection portion disposed inside the nozzle.   2. The nozzle device for fluid spraying according to claim 1, wherein the nozzle of the pneumatic transfer pipe has a trumpet shape, and the fluid ejection part is arranged in a narrow inner part inside the nozzle outlet.   The fluid ejection part is formed of a ceramic particle aggregate formed by solidifying by bonding between nonmetallic particles when a non-metallic particle formed by pressure molding is heat-treated at a temperature below the melting point. Or the nozzle apparatus for fluid spraying of 2 description. The fluid spraying nozzle device according to any one of claims 1 to 3, wherein an outer shape of the fluid ejection portion is formed in any one of a cylindrical shape, a spherical shape, an elliptical shape, a conical shape, and a polygonal shape.

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