JPH0585452U - Nozzle structure of liquid atomizer - Google Patents

Abstract

(57) [Summary] [Object] To provide a nozzle structure of a liquid spraying device capable of appropriately sucking and atomizing a spraying liquid even when there is some error in the positional relationship between the first nozzle and the second nozzle. . A two-fluid in which a second nozzle for sucking up the spray liquid in a direction orthogonal to the center line of the first nozzle 1 is arranged in front of the first nozzle 1 for blowing out the vapor of the liquid for steam. In the nozzle structure of the atomizing liquid atomizer,
At the tip of the inner passage 1a of the first nozzle 1, a blow-out guide surface 1c having a diameter gradually increasing toward the tip surface 1b of the first nozzle 1 is formed. It is possible to blow out steam at a wide angle along 1c, and even if there is some error in the positional relationship between the first nozzle 1 and the second nozzle 2, the error is absorbed and the spray liquid is sucked up and atomized. Can be properly converted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nozzle structure in a two-fluid spraying liquid spraying device having a first nozzle for blowing out steam of a steaming liquid and a second nozzle for sucking up spraying liquid.

[0002]

[Prior Art]

 FIG. 2 shows a schematic configuration of this type of liquid spraying device. In the figure, 21 is a first tank for containing the liquid for vapor, 22 is a liquid supply pipe having one end inserted into the first tank 21, 23 is a pump interposed in the middle of the liquid supply pipe 22, and 24 is a liquid supply pipe. The vaporizer connected to the other end of the liquid pipe 22, 25 is the first nozzle connected to the outlet of the vaporizer 24, 26 is the second tank for containing the spray liquid, and 27 is the second tank 26. A liquid suction pipe having one end inserted therein is a second nozzle 28 connected to the other end of the liquid suction pipe 27.

The vaporizer 24 is provided with an inlet and an outlet (not shown) and a vaporizing space communicating with these, a porous vaporizing element made of sintered metal or the like in the vaporizing space, and the vaporizing space and the vaporizing element. Is equipped with a heater for heating. The first and second nozzles 25 and 28 are each made of a small-diameter metal pipe material, and the second nozzle 28 is arranged in front of the first nozzle 25 in a direction orthogonal to the center line of the first nozzle 25. There is.

In the above liquid spraying device, when the pump 23 is operated in a state where the vaporizer 24 is heated to a predetermined temperature by a heater, the vapor sent into the vaporization space of the vaporizer 24 via the liquid supply pipe 22. The working liquid is vaporized, and its vapor is blown out from the first nozzle 25. At the same time, a negative pressure is generated in the tip portion of the second nozzle 28 by the blowing steam, and the negative pressure causes the spray liquid in the second tank 26 to reach the tip of the second nozzle 28 via the liquid suction pipe 27. The liquid for suction is sucked up, collides with the blowing vapor, is atomized, and is blown out as the atomizing gas together with the vapor.

[0005]

[Problems to be solved by the device]

 By the way, in the above-mentioned liquid spraying device, since a pipe material having a predetermined diameter is cut and used as a nozzle, the angular range of the steam blown out from the first nozzle 25 is narrow, and the first nozzle 25 and the second nozzle 25 Even if there is a slight error in the positional relationship of the nozzle 28, the negative pressure due to the blowing vapor is greatly reduced, and it is difficult to properly suck and atomize the spray liquid.

The present invention has been made in view of the above circumstances, and an object thereof is to suck up and atomize a spray liquid even when there is some error in the positional relationship between the first nozzle and the second nozzle. It is to provide a nozzle structure of a liquid spraying device that can properly perform the above.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, a first nozzle for sucking the spray liquid in a direction orthogonal to the center line of the first nozzle is provided in front of the first nozzle for blowing the vapor of the liquid for vapor. Two nozzles are arranged, and when the vapor of the vapor liquid is blown out from the first nozzle, the spray liquid is sucked up by the negative pressure generated at the tip of the second nozzle, and the spray liquid is made to collide with the blow vapor. In a nozzle structure of a two-fluid atomization type liquid atomization device which is atomized by a blower, a blow-out guide having a diameter gradually increasing toward the tip end portion of the internal passage of the first nozzle toward the tip end surface of the first nozzle. Forming a surface.

[0008]

[Action]

 In the nozzle structure according to the present invention, since the blowout guide surface having a gradually increasing diameter is formed toward the tip end surface of the first nozzle, the first nozzle has a wide angle range along the blowout guide surface. You can blow out steam.

[0009]

【Example】

 FIG. 1 shows a nozzle structure to which the present invention is applied. In the figure, 1 is a first nozzle, 2 is a second nozzle, and 3 is a holder.

The first and second nozzles 1 and 2 are made of stainless (SUS316) pipe material having a tube diameter of about 1.6 mm and a length of about 20 mm, and have an internal passage having an inner diameter of about 0.4 mm.

As shown in FIG. 2, the first nozzle 1 is chamfered at the tip of the circular passage 1a. In the illustrated example, the tip end peripheral surface of the circular passage 1a having an inner diameter of about 0.4 mm is chamfered with the tip surface 1b at an angle θ of 30 to 60 °, whereby the tip surface gradually becomes larger in diameter toward 1b. It shows the blowout guide surface 1c formed at the tip of the internal passage 1a.

The outer surface of the upper end portion of the second nozzle 2 is sharpened. In the illustrated example, the outer surface of the upper end portion of the second nozzle 2 is cut or polished so as to form an angle of 10 to 35 ° with the center line S2 of the second nozzle 2, and the truncated cone-shaped sharp portion 2a is formed into the second nozzle 2. It is shown formed on the upper end of the.

The holder 3 is formed in an L-shape from an amorphous thermoplastic engineering plastic such as PPS (polyphenylene sulfide), PES (polyethersulfone), PS (polysulfone), and has first and second ends at both ends. It holds the approximately middle portion between the nozzles 1 and 2.

The first and second nozzles 1 and 2 are insert-molded together with the holder 3 so as to form a predetermined positional relationship with each other. Specifically, the center line S1 of the first nozzle 1 and the center line S2 of the second nozzle 2 are orthogonal to each other, and the distance X between the tip surface 1b of the first nozzle 1 and the center line S2 of the second nozzle 1 is set to about 5 mm. Has been done. The tip surface 2b of the second nozzle 2 projects slightly from the center line S1 of the first nozzle 1, and the projection amount Y is set to about 0.07 mm.

In the above-mentioned nozzle structure, the rear end 1d of the first nozzle 1 is at the outlet of the carburetor 24 shown in FIG. 3, while the rear end 2c of the second nozzle 2 is the liquid absorbent shown in FIG. Used by connecting to the pipes 27, respectively. As in the conventional case, when the vapor of the liquid for vapor is blown out from the first nozzle 1, the negative pressure generated at the tip of the second nozzle 2 sucks up the liquid for atomization, and the liquid for atomization blows out as vapor. It collides, is atomized, and is blown out as a spray gas together with steam.

In the above-mentioned nozzle structure, since the blowout guide surface 1c having a diameter gradually increasing toward the tip surface 1b is formed at the tip of the internal passage 1a, the blowout guide surface 1c of the first nozzle 1 is formed. It is possible to blow out steam in a wide angle range along the inclination, and even if there is some error in the positional relationship between the first nozzle 1 and the second nozzle 2, the error is absorbed and suction of the spray liquid and You can properly atomize.

Further, since the upper end portion of the second nozzle 2 is formed to be sharp, it is possible to reduce the collision area of the blown steam with respect to the second nozzle 2 and also the influence on the flow of the blown steam. Can be suppressed. In other words, it is possible to blow the steam discharged from the first nozzle 1 forward without lowering the flow velocity or causing turbulence, and obtain the desired negative pressure at the tip of the second nozzle 2 to greatly improve the suction efficiency. Moreover, the spraying can be performed stably.

FIG. 4 shows another embodiment of the first nozzle, which is different from the above embodiment in that the tip of the internal passage 11a is curved or finished by polishing or etching so that the tip surface faces 1b. The difference is that a blowout guide surface 11c having a gradually increasing diameter is formed. Also in the first nozzle 11 of this embodiment, the blown steam can be blown out in a wide angle range along the curvature of the blowout guide surface 11c, and the same action and effect as those of the above-mentioned embodiment can be obtained.

The positional relationship between the two nozzles illustrated in the embodiment may be appropriately changed according to the nozzle diameter and the blowing vapor pressure.

[0020]

As described in detail above, according to the present invention, it is possible to blow out steam from the first nozzle in a wide angle range along the inclination of the blowout guide surface. Even if there is a slight error in the positional relationship with, the error can be absorbed and suction and atomization of the spray liquid can be performed properly.

[Brief description of drawings]

FIG. 1 is a side view of a nozzle structure to which the present invention is applied.

FIG. 2 is a sectional view of a main part of a first nozzle.

FIG. 3 is a schematic configuration diagram of a two-fluid spray liquid spray device.

FIG. 4 is a sectional view of an essential part showing another embodiment of the first nozzle.

[Explanation of symbols]

1 ... 1st nozzle, 1a ... Internal passage, 1b ... Tip surface, 1c
... Blowout guide surface, 2 ... second nozzle, S1, S2 ... center line,
11 ... 1st nozzle, 11a ... Internal passage, 11c ... Blow-out guide surface.

Claims (1)

[Scope of utility model registration request] 1. A first for blowing out vapor of a vapor liquid.
A second nozzle for sucking up the spray liquid in a direction orthogonal to the center line of the first nozzle is arranged in front of the nozzle, and the second nozzle is used when the vapor of the vapor liquid is blown out from the first nozzle. In the nozzle structure of the two-fluid atomization type liquid atomization device in which the atomization liquid is sucked up by the negative pressure generated at the tip portion of the A nozzle structure of a liquid spraying device, characterized in that a blowout guide surface having a diameter gradually increasing toward the front end surface of the first nozzle is formed at the front end portion.