JP2000140716A - Gas-liquid mixing type mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject mixer realizing the good mixing of air and a liquid to atomize the liquid to eject the same as fine particles. SOLUTION: A conical part 10 throttled in a downstream direction is formed to the downstream end of a cylindrical mixing chamber 9 and a gas-liquid passage 3a is connected to the conical part 10, and a liquid passage 4a arranged in coaxial relation to the gas-liquid passage 3a is allowed to face to the interior of the mixing chamber 9 to be opened toward the conical part 10 at its end part and an air passage 5a is connected to a ring-shaped space S formed outside the liquid passage 4a in the mixing chamber 9 to constitute a gas-liquid mixing type mixer 1. By this constitution, water (liquid) flowing in the mixing chamber 9 from the liquid passage 4a is throttled by the flow along the conical part 10 of air (gas) flowing in the mixing chamber 9 from the air passage 5a and, therefore, a negative pressure area is generated in the central part of the flow of water and, since the negative pressure area involves the air flowing along the periphery of this area, water and air are well mixed and water is atomized by this mixing to be ejected as fine particles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid mixing mixer for mixing a gas and a liquid to jet a spray-like mixed flow.

[0002]

2. Description of the Related Art For example, a gas-liquid mixing type mixer is used for a cleaning nozzle device for removing foreign matter such as cutting chips clogged in a narrow place or a deep hole of a machined workpiece. This gas-liquid mixing mixer atomizes a liquid such as water or a coolant by an accelerated air flow and jets it.

FIGS. 4 and 5 show a conventional gas-liquid mixing type mixer 1.
1 and 201, the gas-liquid mixing type mixer 101 shown in FIG. 4 has an air passage 1 in a cylindrical mixing chamber 109 formed in a mixer body 102.
05 is opened, the water passage 104 is connected to the ring-shaped space S formed outside the air passage 105 in the mixing chamber 109, and water flowing from the water passage 104 into the mixing chamber 109 through the check valve 111 is removed. The air is sprayed from the air passage 105 to the mixing chamber 109 through the check valve 112 to increase the speed and atomize the air.

A gas-liquid mixing type mixer 201 shown in FIG.
The air nozzle 205 tapered toward the downstream (right side in FIG. 5) is opened in the cylindrical mixing chamber 209 formed in the mixer body 202, and formed outside the air passage 205 a in the mixing chamber 209. The water passage 204 is connected to the ring-shaped space S, and the water passage 20 is connected.
The water flowing into the mixing chamber 209 from No. 4 is accelerated and atomized by the air ejected from the air passage 205a into the mixing chamber 209.

[0005]

However, in the conventional gas-liquid mixing type mixers 101 and 201 shown in FIGS. 4 and 5, since water to be mixed with air is repelled by a high-speed air flow, both of them are repelled. There was a problem that mixing was not performed well.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to realize good mixing of a gas and a liquid so that the liquid can be atomized into fine particles and ejected. It is to provide a gas-liquid mixing type mixer.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a conical portion narrowed downstream is formed at a downstream end in a cylindrical mixing chamber. And a liquid passage coaxially arranged with the gas-liquid passage facing the inside of the mixing chamber, and an end thereof is opened toward the conical portion, and the liquid passage in the mixing chamber is connected to the gas passage. A gas passage is connected to a ring-shaped space formed outside of the mixer to constitute a gas-liquid mixing type mixer.

According to a second aspect of the present invention, in the first aspect, a plate having a plurality of holes is provided in the ring-shaped space.

According to a third aspect of the present invention, in the second aspect of the present invention, the holes are formed obliquely with respect to a gas flow direction.

Therefore, according to the first aspect of the present invention, the liquid flowing into the mixing chamber from the liquid passage is throttled by the flow along the conical portion of the gas flowing from the gas passage into the mixing chamber. A negative pressure region is generated in the center, and the liquid and the gas are mixed well because the gas flowing around the negative pressure region is entrained, and the liquid is atomized and ejected as fine particles by the mixing.

According to the second aspect of the present invention, the flow velocity of the gas flowing from the gas passage through the ring-shaped space is adjusted by the opening area of the hole formed in the plate, so that the gas flow velocity suitable for demand can be obtained. Energy saving can be realized.

According to the third aspect of the present invention, the gas that has passed through the hole formed obliquely in the plate forms a swirling flow, so that the gas and the liquid are more effectively mixed by the swirling flow. In addition, the atomization of the liquid is performed more efficiently.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a gas-liquid mixing type mixer according to the present invention, FIG. 2 is an exploded perspective view of the gas-liquid mixing type mixer,
FIG. 3 is an enlarged sectional view taken along line AA of FIG.

Gas-liquid mixing type mixer 1 according to the present embodiment
Is a method in which water is atomized into fine particles by mixing water and air, and the atomized water is spouted out for use in required applications such as washing. Is connected to three pipes 3, 4, and 5.

The mixer body 2 includes a plurality of two-stage cylindrical members 2A and 2B, which are divided into two parts, with a ring-shaped orifice plate 6 and two O-rings 7 for sealing interposed therebetween. (In the embodiment, six bolts) 8 are integrally fastened, and a cylindrical mixing chamber 9 is formed therein.

As shown in FIG. 2, a plurality of (six in the present embodiment) screw holes 2a are formed at an equiangular pitch (6 in the present embodiment) in the joint end face of one member 2A constituting the mixer main body 2.
The same number (six) of bolt insertion holes 2 are provided in the other member 2B and the orifice plate 6.
b and 6a are formed at an equal angular pitch.

Thus, the mixer main body 2 includes the two members 2A,
The orifice plate 6 and the O-ring 7 are sandwiched between the two members 2B, and the bolt 8 inserted into the bolt insertion holes 2b and 6a respectively formed in the member 2B and the orifice plate 6 is screwed into the other member 2A. The two members 2A and 2B are screwed into 2a and joined and integrated.

As shown in FIG. 1, a mixing chamber 9 is formed inside the mixer main body 2 as described above.
A conical portion 10 narrowed toward the downstream of the flow direction of water and air indicated by an arrow in FIG.
The pipe 3 connected to the conical portion 10 is connected to the center of B. The inside of the pipe 3 forms a gas-liquid passage 3a, and a cleaning nozzle (not shown) or the like is attached to the other end of the pipe 3.

The pipe 4 is arranged coaxially with the pipe 3 and passes through the center of the member 2A of the mixer body 2 and the center of the orifice plate 6.
And its end is open toward the conical portion 10. The inside of the pipe 4 is a liquid passage 4a.
The other end of the pipe 4 is connected to a water pump (not shown).

A ring-shaped space S is formed around the pipe 4 of the mixing chamber 9, and the orifice plate 6 is provided so as to divide the ring-shaped space S. A plurality (16 in the illustrated example) of circular holes 6
b, and each circular hole 6b is formed obliquely to the direction of air flow (the direction of the arrow in FIG. 3) as shown in FIG.

The pipe 5 is connected to the member 2A of the mixer main body 2 in a direction perpendicular to the axis with respect to the other pipes 3 and 4.
The ring-shaped space S formed therein is opened upstream of the orifice plate 6. The inside of the pipe 5 constitutes a gas passage 5a, and the other end of the pipe 5 is connected to an air compressor (not shown).

Next, the operation of the gas-liquid mixing type mixer 1 configured as described above will be described.

A water pump (not shown) and an air compressor are driven to supply pressurized water to the liquid passage 4a in the pipe 4.
While the compressed air flows through the gas passage 5a in the pipe 5.
In the gas-liquid mixing type mixer 1, the compressed air flows from the gas passage 5 a into the ring-shaped space S in the mixing chamber 9, and this air flows into the orifice plate 6.
Pass through the circular hole 6b formed in the hole. Here, as described above, since the circular hole 6b is formed obliquely with respect to the flow direction of the air (see FIG. 3), the air passing through the circular hole 6b forms a swirling flow along the conical portion 10. Flowing.

On the other hand, the pressurized water flowing through the liquid passage 4 a in the pipe 4 is mixed with the mixing chamber 9 in the mixer body 2.
However, since the flow of the pressurized water is restricted by the swirling flow of the air along the conical portion 10, a negative pressure region is generated at the center of the flow, and this negative pressure region is Water and air are satisfactorily mixed to entrain the air flowing around, and the water is atomized as fine particles by this mixing and is ejected to the gas-liquid passage 3 a in the pipe 3. Then, the atomized water in the form of spray is used for required uses such as washing.

In this embodiment, the gas passage 5
Since the flow velocity of the air flowing through the ring-shaped space S from a is adjusted by the opening area of the circular hole 6b formed in the orifice plate 6, it is possible to obtain a flow velocity of the air suitable for the application and realize energy saving. Can be. In particular, since water is efficiently mixed with a small amount of air and atomized as fine particles, the amount of air consumption is smaller than before,
Thereby, energy saving is realized.

In this embodiment, since the air passing through the circular hole 6b formed obliquely in the orifice plate 6 forms a swirling flow, the mixing of the air and water is further improved by the swirling flow. The atomization of water is performed more efficiently.

In this embodiment, a gas-liquid mixing mixer for mixing water and air has been particularly described. However, the present invention is also applicable to a gas-liquid mixing mixer for mixing liquid and gas in other places. Of course, it is included in the application object.

[0029]

As is apparent from the above description, claim 1
According to the described invention, the liquid flowing into the mixing chamber from the liquid passage is throttled by the flow along the conical portion of the gas flowing into the mixing chamber from the gas passage, so that a negative pressure region is generated at the center of the flow. In this negative pressure region, the liquid and the gas are mixed well because the gas flowing around the negative pressure region is entrained, and the liquid is atomized and ejected as fine particles by this mixing.

According to the second aspect of the present invention, the flow velocity of the gas flowing from the gas passage through the ring-shaped space is adjusted by the opening area of the hole formed in the plate, so that a gas flow velocity suitable for demand can be obtained. And energy saving can be achieved.

According to the third aspect of the present invention, the gas that has passed through the hole formed obliquely in the plate forms a swirling flow, so that the gas and the liquid can be more effectively mixed by the swirling flow. Thus, the effect that the atomization of the liquid is performed more efficiently can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a gas-liquid mixing type mixer according to the present invention.

FIG. 2 is an exploded perspective view of a gas-liquid mixer according to the present invention.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 1;

FIG. 4 is a side sectional view of a conventional gas-liquid mixing type mixer.

FIG. 5 is a side sectional view of a conventional gas-liquid mixing type mixer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas-liquid mixing type mixer 2 Mixer main body 3, 4, 5 Pipe 3a Gas-liquid passage 4a Liquid passage 5a Gas passage 6 Orifice plate (plate) 6b Circular hole (hole) 9 Mixing chamber 10 Conical part S Ring-shaped space

Claims (3)

[Claims] 1. A conical portion narrowed toward the downstream at a downstream end in a cylindrical mixing chamber, a gas-liquid passage is connected to the conical portion, and the conical portion is coaxially arranged with the gas-liquid passage. The liquid passage facing the mixing chamber, the end of the liquid passage is opened toward the conical portion, and the gas passage is connected to a ring-shaped space formed outside the liquid passage in the mixing chamber. A gas-liquid mixing type mixer characterized by the above-mentioned. 2. A gas-liquid mixer according to claim 1, wherein a plate having a plurality of holes is provided in said ring-shaped space. 3. The gas-liquid mixing type mixer according to claim 2, wherein said holes are formed obliquely to a gas flow direction.