JP2883516B2 - Bubble mixing nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble mixing nozzle for mixing very small bubbles in a water flow.

[0002]

2. Description of the Related Art Mixing air bubbles into a water stream has various effects, such as dissolving oxygen in water to activate the water, protecting living organisms in the water, or promoting the generation of bacteria in the water. For this reason, research is being actively conducted to utilize this.

[0003] As a device for mixing air bubbles into such a water stream, a device is used in which countless small holes are used to feed air into a large number of foamed stones using a small compression pump and create small air bubbles when passing through the foamed stones. It has been known.

[0004] In this bubble mixing device, when the pressure-fed air is discharged into the water as bubbles, the bubbles expand and become large. Therefore, a bubble generator that generates bubbles with a nozzle that mixes not compressed air but negative pressure air is used. The present applicant has proposed this in Japanese Patent Application Laid-Open No. 4-126542.

[0005]

However, in the bubble generator according to the above-mentioned publication, while the water stream is spirally rotated, negative pressure air is sent to the center of the stream to generate ultrafine bubbles. Is large and the structure is complicated, so that it is not suitable for, for example, mixing air bubbles in a water flow in a small water tank for ornamental fish.

An object of the present invention is to provide a bubble mixing nozzle capable of mixing extremely small bubbles of negative pressure into a water flow with an extremely simple structure, taking into account the problems of the conventional bubble generator described above. I do.

[0007]

According to the present invention, as a means for solving the above-mentioned problems, a pressure reducing portion for changing the cross section is provided in the middle of a pipe through which a water flow passes, and a gas inlet is formed in the pressure reducing portion. A branch member is provided near the boundary where the cross section changes to divide the water flow in the pipeline, and a bubble mixing nozzle is provided to allow gas to be freely mixed into the water flow from the outer circumference of the pressure reducing portion and the center of the pipeline.

[0008] In the bubble mixing nozzle having such a configuration,
The conduit is formed from an introduction pipe and a discharge pipe having an enlarged cross section with an inner diameter different from that of the cross section.A fixing ring and a gas inlet are provided near a position where the cross section changes, and the fixing ring has a branch member at the center thereof. Can be included.

Alternatively, the pipe is formed from a discharge pipe having the same inner diameter as the inlet pipe, and a fixing ring serving as an orifice having an inner diameter smaller than the inner diameter of the pipe and a gas inlet are provided near the boundary between the two. The fixing ring may have a branch member near its center.

[0010]

When the required flowing water is supplied to the bubble mixing nozzle having the above-described structure, the flow velocity decreases when moving from the inflow side to the discharge side of the pipeline, and the divided water having a reduced dynamic pressure becomes a negative pressure. The gas is sucked from the gas inlet provided near the section where the cross section changes.

The sucked gas is mixed into flowing water as small negative pressure bubbles. The size of this bubble can be changed by providing a valve such as a throttle valve above the inlet and adjusting the state of the gas to be sucked, and the smallest bubble obtained can be visually identified. It is so small that it cannot be controlled and floats in the water for a long time as small points, and does not easily float out of the water.

For this reason, the gas naturally dissolves in the water and dissolves in the water within a long time, and disappears. In this nozzle, various kinds of gas, such as air, ozone, and carbon dioxide, are suctioned depending on the purpose of use and can be mixed into water.

[0013]

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

FIG. 1 is a view showing the principle structure of the bubble mixing nozzle of the embodiment. The inner diameter of the discharge pipe 2 on the outlet side is larger than the inner diameter of the inlet pipe 1 on the inlet side. By expanding the pipe line, the dynamic pressure of the water flow flowing in the pipe line is reduced, forming a decompression portion. .

A suction pipe 3 having a gas inlet 3a is provided in the vicinity of a boundary portion serving as a decompression portion, and a fixed ring 4 having a branch member 4a for diverting a flow of a water flow.
Is provided. The fixed ring 4 is a ring-shaped member having an inner diameter substantially equal to the inner diameter of the introduction pipe 1 and equal to the inner diameter of the discharge pipe 2, and is provided with a branch member 4 a at the center of the inner diameter for dividing the flow path into two. Have been.

The fixing ring 4 is for fixing the branching member 4a in the pipe, and has an inlet pipe 1 and a discharge pipe 2
The fixing ring 4 may not necessarily be provided as long as the fixing ring 4 can be formed integrally with any of the above. Also, the inner diameter of the inlet pipe 1 does not need to be smaller than the inner diameter of the discharge pipe 2, and the inner diameters of both may be the same by providing the fixing ring 4 as an orifice.

FIG. 2 shows a bubble mixing nozzle according to a second embodiment. (A) is a main cross-sectional view in an assembled state, (b) is an arrow B
FIG. 3C is a cross-sectional view as viewed from −B, and FIG. The basic structure is the same as that of the first embodiment.

The inner diameter of the inlet pipe and the inner diameter of the outlet pipe 2 are the same, and the fixing ring 4 is provided as an orifice and divides the flow by the branching member 4a. (C) As shown in the figure, the fixing ring 4 and the discharge pipe 2 are formed as separate members so as to be fitted inside the introduction pipe 1 and assembled.

The fixing ring 4 has a branching member 4a at the center of its inner diameter, and is divided into four extending in the flow path direction (the number of divisions is not limited to this, and may be two, three, or five or more). Having a cylindrical portion 4b. When the fixing ring 4 and the discharge pipe 2 are assembled, a slight annular gap 4X is formed between the fixing ring 4 and the discharge pipe 2 so that the inlet 3a of the gas suction pipe 3 matches the position of the gap 4X. It is provided in.

The basic operation is the same in any of the embodiments constructed as described above. When the water flow is sent from the introduction pipe 1 to the discharge pipe 2, since the inner diameter of the discharge pipe 2 is larger than the inner diameter of the fixed ring 4, the pressure of the water flow is reduced by an amount corresponding to the reduced flow velocity and the reduced dynamic pressure. . Therefore, gas is sucked from the intake 3a of the suction pipe 3 provided near the position where the cross section is enlarged. This gas is inhaled at a slight but negative pressure.

As shown by arrows in FIG. 1B, the inhaled gas is sent to the center of the flow along the surface of the fixed ring 4 in an annular shape and along the central branching member 4a. Mixed in.

The mixed gas becomes turbulent due to an increase in the diameter of the pipe, and is mixed into the water flow in which a vortex or the like is generated. Therefore, the gas is mixed as fine bubbles. The size of these bubbles can be adjusted to some extent by adjusting a valve (not shown) provided above the suction pipe.

The extremely fine bubbles obtained by this adjustment may not be distinguished from the bubbles, for example, by visual observation, but may be small enough to be noticed as bubbles only after staring at it for a while, and may look like a white dust. For example, if it is contained at a certain depth in the water tank, bubbles that do not easily float are obtained.

The same applies to the second embodiment. However, since the internal structure is slightly different, only the gas mixing path is slightly different, and almost the same operation and effect can be obtained. In this embodiment, the gas from the suction pipe 3 is supplied to the inlet 3a → the gap 4X between the fixed ring 4 and the discharge pipe 2 → the divided gap of the cylindrical part 4b of the fixed ring 4 → the inside of the cylindrical part 4b → the discharge pipe. It is taken into 2.

FIG. 3 shows a bubble mixing nozzle 1 according to the second embodiment.
0 shows an example in which the water in the aquarium fish tank is activated and used in combination with a water tank pump. Circulation pump 11
The water tank pump in which the motor 12 is integrated into the water tank sucks the water in the water tank from the suction pipe 14 having the filter 13 at the lower end, and sends the water flow to the bubble mixing nozzle 10.

In the bubble mixing nozzle 10, the valve 15 is adjusted to adjust the fine particle size of the bubbles, and these extremely small bubbles are mixed into the water stream and discharged into the water tank. Since the discharged water contains extremely minute bubbles for a long time, oxygen is dissolved in the water from the bubbles, for example, when the gas is air.

[0027]

As described in detail above, the air bubble mixing nozzle of the present invention has a gas inlet at a position where the cross section of the pipe changes, and has a very simple structure capable of mixing extremely fine air bubbles into the water flow. Nozzle, so that the necessary gas can be contained in the water stream in the form of ultra-fine particles and dissolved, activating water quality or dissolving various gases such as ozone and carbon dioxide in water as necessary It has a very remarkable effect that a gas can be mixed in accordance with each application, such as the formation of a gas.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bubble mixing nozzle according to a first embodiment.

FIG. 2 is a sectional view and an exploded perspective view of a bubble mixing nozzle according to a second embodiment.

FIG. 3 is a schematic diagram of an application example in combination with an aquarium fish tank pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Introductory pipe 2 Discharge pipe 3 Suction pipe 3a Inlet 4 Fixing ring 4a Branch member 4X Annular clearance

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-87446 (JP, A) JP-A-61-74664 (JP, A) JP-A-2-26658 (JP, A) JP-A-4- 235761 (JP, A) Fully open 49-55766 (JP, U) Fully open 63-133229 (JP, U) Fully open 5-26149 (JP, U) Fully open 5-26151 (JP, U) J. 46-32633 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B05B 1/00-1/36

Claims (3)

(57) [Claims] 1. A depressurization portion for changing the cross section to reduce the pressure is provided in the middle of a pipe through which a water flow passes, and a gas inlet is formed in the depressurization portion, and the water flow in the pipe near the boundary position where the cross section changes. A bubble mixing nozzle provided with a branching member for branching so that gas can be freely mixed into the water flow from the outer periphery of the decompression portion and the center of the pipeline. 2. The pipe line is formed of an inlet pipe and a discharge pipe having an enlarged cross section having an inner diameter of a different diameter, and a fixing ring and a gas inlet are provided near a position where the cross section changes. The air bubble mixing nozzle according to claim 1, further comprising a branch member at the center. 3. The pipe is formed from a discharge pipe having the same diameter as the inlet pipe, and a fixing ring and an air inlet are provided near the boundary between the two, serving as orifices whose inner diameter is smaller than the pipe inner diameter. 2. The air bubble mixing nozzle according to claim 1, wherein the fixing ring has a branch member near the center thereof.