JP2509120Y2 - Nozzle structure of liquid spray device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle structure in a two-fluid spray type liquid spraying device having a first nozzle for blowing out the vapor of a vapor liquid and a second nozzle for sucking up the spray liquid. it is intended to function.

[0002]

2. Description of the Related Art FIG. 3 shows a schematic structure of a liquid spraying device of this type. In FIG. 1, reference numeral 21 denotes a first tank for storing a vapor liquid, 22 denotes a liquid supply pipe having one end inserted into the first tank 21, 23 denotes a pump interposed in the liquid supply pipe 22, and 24 denotes a supply pipe. A vaporizer connected to the other end of the liquid pipe 22, 25 is a first nozzle connected to the outlet of the vaporizer 24, 26 is a second tank containing the liquid for spraying, 27 is one end in the second tank 26. Inserted suction pipe, 28
Is a second nozzle connected to the other end of the liquid absorbing pipe 27.

The vaporizer 24 has an inlet and an outlet (not shown) and a vaporizing space communicating with these, and a porous vaporizing element made of sintered metal or the like in the vaporizing space, and the vaporizing space and the vaporizing element. It 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 is installed in front of the first nozzle in a direction orthogonal to the center line of the first nozzle. 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 the heater, the vapor liquid fed into the vaporization space of the vaporizer 24 through the liquid supply pipe 22 is discharged. It is vaporized and its vapor is blown out from the tip of the first nozzle 25. At the same time,
A negative pressure based on the Venturi action is generated at the tip portion of the second nozzle 28 by the blown steam, and the negative pressure causes the second pressure
The atomizing liquid in the tank 26 is sucked up to the tip of the second nozzle 28 via the liquid absorbing pipe 27, the atomizing liquid collides with the blown vapor, is atomized, and is blown out together with the vapor.

[0006]

In the liquid spraying apparatus described above, the negative pressure generated at the tip of the second nozzle 28 when the vapor of the vaporizing liquid is blown from the tip of the first nozzle 25 causes the spraying liquid to be sprayed. Because it is sucking up,
The mixing amount and atomized particle size of the atomizing liquid in the atomizing gas greatly differ depending on the positional relationship between the two nozzles 25 and 28.

Conventionally, in order to obtain a predetermined mixing amount and atomized particle size, the first and second nozzles 25 and 28 are configured to be movable in the center line direction, and both nozzles 25 and 28 are formed using a measuring jig or the like.
Although the positional relationship of is adjusted after assembly, both nozzles 25,
The adjustment work is extremely troublesome due to the fact that the tube diameter of 28 is small, and there is a drawback that high accuracy cannot be expected because the adjustment is performed by visual measurement. In addition, since the nozzles 25 and 28 after adjustment may be displaced due to the addition of impact or vibration, it is difficult to maintain the initial positional relationship.

[0008] The present invention has been made in view of the above circumstances, and has as its object a required adjustment of the position of both the nozzle, moreover to maintain the mutual positional relationship, in the spray gas
Stable atomization of a predetermined amount of spray liquid and atomized particle size
And to provide a nozzle structure of a liquid spray device you allow.

[0009]

In order to achieve the above-mentioned object, in the first aspect of the present invention, a spray is provided in front of a first nozzle for ejecting vapor of a vapor liquid in a direction orthogonal to the center line of the first nozzle. A second nozzle for sucking up the spray liquid, and sucking the spray liquid by the negative pressure generated at the tip of the second nozzle when the vapor of the steam liquid is blown from the tip of the first nozzle, In a nozzle structure of a two-fluid spray type liquid spraying device, in which a working liquid is collided with blown-out steam to be atomized, the first nozzle tip and the above-mentioned
The distance from the center line of the second nozzle is X mm, and the first nozzle
The amount of protrusion of the second nozzle from the center line of the nozzle was set to Ymm.
When, X = K1 · φ (where, 3 ≦ K1 ≦ 25, φ is first
Inside diameter mm) Y = K2 · X of the nozzle (where, 0 <K2 ≦ 0.08) of
The first nozzle and the second nozzle are arranged so that the positional relationship satisfying the conditions is established.
The sluice is arranged and insert-molded with a resin holder.

[0010]

In the nozzle structure according to the present invention, since the first and second nozzles are insert-molded and integrated with the resin holder, both nozzles can be fixed in a predetermined positional relationship at the same time as the molding. it can.

[0012] The first blow-off steam from the first nozzle
2 Effective to generate a large negative pressure at the tip of the nozzle
Rarely, and spraying liquid (liquid) for spraying vapor (gas)
Can be made to collide accurately with the spray liquid (liquid)
Stable and reliable granulation (atomization) can be performed.

[0012]

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 have a tube diameter of about 1.6.
It is made of stainless steel (SUS316) pipe material having a length of 20 mm and a length of about 20 mm, and has a circular passage having an inner diameter of about 0.4 mm therein. Further, the outer surface of the upper end portion of the second nozzle 2 is sharpened, and the outer ring of the tip end surface has a curved surface finish of about R0.1.

The holder 3 is made of PPS (polyphenylene sulfide), PES (polyether sulfone), PS.
(Polysulfone) or other amorphous thermoplastic engineering plastics to L
It is formed in a letter shape and holds substantially middle portions of the first and second nozzles 1 and 2 at both ends.

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 1a of the first nozzle 1 and the center line S2 of the second nozzle 2 is about 5 mm. It is set. The tip 2a of the second nozzle 2 slightly projects from the center line S1 of the first nozzle 1, and the projection amount Y is set to about 0.07 mm.

The above interval X (mm) and the amount of protrusion Y (mm)
Can be calculated based on the following formula obtained from experimental data: X = K1 · φ (where 3 ≦ K1 ≦ 25, φ is the inner diameter mm of the first nozzle) Y = K2 · X ( However, 0 < K2 ≦ 0.08) Incidentally, in the present embodiment, the interval X and the protrusion amount Y can be properly set even if other values within the above range are used as K1 and K2.

In the above nozzle structure, the rear end 1b of the first nozzle 1 is at the outlet of the vaporizer 24 shown in FIG. 3, while the rear end 2b of the second nozzle 2 is at the liquid suction pipe 27 shown in FIG. Used by connecting each.

In this embodiment, since the outer ring of the tip end surface of the second nozzle 2 has a curved surface finish of about R0.1, the center line S1 of the first nozzle 1 substantially coincides with the lower end of the curved surface, and the first nozzle The vapor of the liquid for vapor blown out from 1 is blown out around this lower end.

Then, a negative pressure due to the Venturi action is generated at the tip portion of the second nozzle 2 by the blown vapor, and the spray liquid is sucked up by the tip of the second nozzle 2 by the negative pressure, and the spray liquid is collected. It collides with the blowing steam and is atomized and blown out with the steam.

According to the above-mentioned nozzle structure, since the first and second nozzles 1 and 2 are insert-molded and integrated with the resin holder 3, both nozzles 1 and 2 are formed at predetermined positions at the same time when they are molded. The nozzles 1 and 2 can be fixed relative to each other, and there is no need to adjust the positions of the nozzles 1 and 2 after assembly. Even when shock or vibration is added, both nozzles 1,
The mutual positional relationship between the two can be maintained as it is at the time of molding.

Further, the tip 2a of the second nozzle 2 is made to project slightly from the center line S1 of the first nozzle 1 so that both nozzles 1, 2
Since the positional relationship between the spray liquid and the spray liquid is appropriately set, a sufficient load can be generated at the tip portion of the second nozzle 2 by the spray steam, and the spray steam can collide with the spray liquid accurately. Stable and fine atomization can be performed. By the way, in the positional relationship illustrated in the above example, the atomized particle size of about 10 μm could be obtained in the spray liquid.

The positional relationship between the two nozzles in the embodiment can be changed in various ways depending on the nozzle diameter and the vapor pressure blown out from the first nozzle. Further, the shape of the holder is not limited to the L shape, and various shapes can be adopted within a range in which the holder can be formed.

[0023]

As described in detail above, according to the nozzle structure of claim 1, since the first and second nozzles are insert-molded and integrated with the resin holder, both nozzles are molded. At the same time, it is possible to fix them in a predetermined positional relationship, and after assembly , troublesome fine adjustment of the positional relationship between both nozzles, etc.
There is no need to. Further, even if impact or vibration is added, there is an advantage that the mutual positional relationship between the two nozzles can be maintained in the state at the time of molding.

Further, effective for the balloon steam from the first nozzle Ru to generate a large negative pressure to the tip of the second nozzle
The fruit is born , and the spraying vapor (gas) is a liquid for spraying.
A liquid for spraying that can accurately collide with (liquid)
Stable and reliable atomization (atomization) of (liquid) can be performed.

[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 top view of FIG.

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

[Explanation of symbols]

1 ... 1st nozzle, 2 ... 2nd nozzle, 2a ... tip, 3 ... holder, S1, S2 ... center line.

Claims (1)

(57) [Scope of utility model registration request] 1. A first method 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 when the vapor of the vapor liquid is discharged from the tip of the first nozzle, siphoning spray liquid by the negative pressure generated at the tip portion of the second nozzle, the two-fluid spray nozzle structure of a liquid spray apparatus that atomizes collide into steam blows the spray liquid, the first nozzle tip And the center line of the second nozzle
Is X mm, and the second nozzle from the center line of the first nozzle is
When the Ymm amount of protrusion of the le, X = K1 · φ (where, 3 ≦ K1 ≦ 25, φ is the
Inner diameter of one nozzle mm) Y = K2 · X (where 0 <K2 ≦ 0.08) so that the first nozzle and the second nozzle form a positional relationship satisfying the condition of 0 <K2 ≦ 0.08 .
Nozzle structure of the liquid spray apparatus and a nozzle arranged, characterized by being insert-molded with resin retainer.