JP4328904B2 - Gas-liquid mixing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas-liquid mixing apparatus that supplies air to a fluid agitator immersed in water and mixes it.
[0002]
[Problems to be solved by the invention]
A cylindrical fluid stirrer that is open at both ends and provided with gas-liquid mixing means inside the tube is immersed in water, and gas is sent from a gas nozzle tube below the gas-liquid mixing means to mix the gas and water. Liquid mixing devices are known.
These gas-liquid mixing devices are widely used for aerators, aeration devices, gas-liquid reactions and the like.
[0003]
Conventionally, as shown in FIG. 2, this type of gas-liquid mixing apparatus comprises a fluid stirrer 2 having a gas-liquid mixing means and a gas nozzle pipe 3 formed by two separate members, and a gas supply main pipe. The gas stirrer 2 is attached to the gas nozzle tube 3 integrated with the support leg 17 via the support leg 17.
[0004]
By the way, this kind of gas-liquid mixing device arranges the fluid agitator 2 and the gas nozzle tube 3 concentrically, and between the gas-liquid mixing means inside the fluid agitator 2 and the discharge port of the gas nozzle tube 3, It is necessary to secure and install a predetermined space necessary for drawing water with the buoyancy of the gas. However, in the conventional structure, each fluid agitator 2 is in a state where the inside cannot be seen, and the gas nozzle tube 3 is used each time. Therefore, it is difficult to secure the above-mentioned concentric arrangement and a predetermined space, and this problem cannot be completely solved even with highly skilled techniques.
[0005]
Further, since the fluid agitator 2 is conventionally attached to the gas supply main pipe 5 via a separate support member 17, the number of parts increases and the cost increases. Furthermore, since the support member 17 is a separate member from the gas nozzle tube 3, there is a problem that the displacement of the fluid agitator 2 and the gas nozzle tube 3 is likely to occur after attachment.
[0006]
Accordingly, an object of the present invention is to form a fluid stirrer and a gas nozzle pipe integrally, and simply hold the gas nozzle pipe in communication with the gas supply main pipe so that the fluid stirrer and the gas nozzle pipe maintain a predetermined positional relationship. Another object of the present invention is to provide a gas-liquid mixing device having a structure attached to a gas supply main.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a gas-liquid mixing apparatus of the present invention comprises a fluid stirrer provided with gas-liquid mixing means inside a tubular body having a fluid inlet on one side and a discharge port on the other side; A gas nozzle pipe having a communication fixing means to the gas supply main pipe on the proximal end side of the pipe body having a smaller diameter than the pipe body of the stirrer and having a discharge port on the distal end side, and the discharge port of the gas nozzle pipe are fluid-stirred. A coupling member that is arranged below the gas-liquid mixing means of the vessel via a predetermined space, and that forms a fluid passage between the fluid agitator and the gas nozzle tube and integrates the gas nozzle tube and the fluid agitator coaxially; It is characterized by comprising.
[0008]
The communication fixing means of the gas nozzle pipe to the gas supply main pipe is preferably configured by a screw portion formed on the shaft body base end side of the gas nozzle pipe.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the fluid mixing device 1 of the present invention integrates a fluid agitator 2 and a gas nozzle tube 3 in a predetermined positional relationship by a coupling member 4, and the gas nozzle tube 3 is a gas supply main tube 5 at the installation site. It is structured to communicate with and be fixed to.
[0010]
The fluid agitator 2 of the embodiment shown in the figure is provided with a gas-liquid stirring and mixing means 9 in a tube body 8 having a fluid inlet 6 on one side (lower) and a discharge port 7 on the other side (upper). It is configured.
Incidentally, the gas-liquid agitation / mixing means 9 in the embodiment shown in the figure generates a gas-liquid mixed fluid introduced from the fluid inlet 6 of the tube body 8 into a swirling flow having a negative pressure portion at the center. 9a and a projection 9b that makes the generated swirl flow collide and gas-liquid mix, and the variable flow path structure 9a is upstream (lower side) of the crossing portion of the crossed left and right semi-elliptical vanes 10 and 10. The edge is closed by an inverted triangular partition plate 11 that bisects the tubular body 8, and a cylindrical body 12 for controlling the flow rate in the direction of the central axis thereof is penetrated and integrally coupled.
[0011]
The gas nozzle tube 3 has a gas introduction port 13 on one side (lower side) and a gas discharge port 14 on the other side (upper end), and has a smaller diameter than the tube 8 of the fluid agitator 2. And a communicating / fixing means 15 to the gas supply main pipe 5 is provided on the base end side. The communication / fixing means 15 of the embodiment shown in the figure is formed of a screw portion formed in the cylindrical body of the gas nozzle tube 3 and is screwed into a screw hole of the gas supply main tube 5 so that the gas supply main tube 5 and the gas nozzle are connected. The pipe 3 is configured to communicate.
[0012]
The coupling member 4 is used to integrally couple the fluid agitator 2 and the gas nozzle tube 3 in advance while maintaining a predetermined positional relationship. In the illustrated embodiment, the outer surface of the gas nozzle tube 3 and the tube of the fluid agitator 2 are coupled together. The discharge nozzle 14 of the gas nozzle tube 3 is arranged concentrically in the tube 8 of the fluid agitator 2 and includes the gas nozzle tube 3. The fluid agitator 2 and the gas nozzle tube 3 are integrally coupled so that a predetermined space is formed between the discharge port 14 and the variable flow path structure 9 a of the fluid agitator 2.
Here, the “predetermined space” is sufficient to draw water from the lower part of the tube body 8 and send it to the gas-liquid mixing means 9 with the lift force of the gas discharged from the discharge port 14 of the gas nozzle tube 3. Means space.
[0013]
The gas-liquid mixing device 1 of the present invention is installed in a liquid such as water, and a gas such as air sent from an external gas supply main pipe 5 is sent to the fluid agitator 2 through the gas nozzle pipe 3 to The liquid is drawn in using the lift force in the liquid and is sent toward the gas-liquid mixing means 9 above. Therefore, the pipe body 8 integrated with the gas nozzle pipe 3 needs to hold the fluid inlet 6 between the gas nozzle pipe 3. In the embodiment shown in the figure, the passage between the plates 4a constituting the coupling member 4 is a fluid introduction port 6, and the lower end of the tube body 8 is cut out in an arc shape to expand the opening of the fluid introduction port 6. The port 6 is not limited to the illustrated embodiment. For example, although the drawing is omitted, an opening is formed in the side plate of the tube body 8 below the discharge port 14 of the gas nozzle tube 3 to form a fluid introduction port. May be.
[0014]
In the illustrated embodiment, a screw is formed in the lower part of the gas nozzle tube 3 to serve as a communication / fixing means 15 to the gas supply main tube 5. For this reason, the nut portion 16 for screw fastening is integrally formed on the shaft body of the gas nozzle tube 3.
[0015]
In the gas-liquid mixing apparatus 1 of the present invention, the use of a synthetic resin material is advantageous in terms of cost and processing, but it can also be formed of a metal material such as steel, aluminum, and stainless steel.
[0016]
【effect】
In the gas-liquid mixing device of the present invention, the fluid stirrer and the gas nozzle pipe are integrated in advance in a predetermined positional relationship, and the gas nozzle pipe is provided with a means for communicating / fixing to the gas supply main pipe. By simply coupling the fixing means to the gas supply main pipe, the fluid agitator and the gas nozzle pipe are attached to the installation position in a predetermined positional relationship.
[0017]
Therefore, it is not necessary to pay attention to the alignment of the fluid agitator and the gas nozzle tube, and to secure the space between the discharge port of the gas nozzle tube and the gas-liquid mixing means.
[0018]
By simply screwing onto the gas supply main pipe of the gas nozzle pipe, the installation is completed and the operation is simple, and the gas-liquid mixing device can be firmly fixed against the centrifugal force caused by the swirling fluid.
In addition, since the support legs for supporting the fluid agitator are not necessary, manufacturing costs and installation costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a gas-liquid mixing apparatus according to an embodiment of the present invention in a partially cutaway cross section. FIG. 2 is a diagram of a conventional gas-liquid mixing apparatus and its mounting configuration.
DESCRIPTION OF SYMBOLS 1 ... Gas-liquid mixing apparatus 2 ... Fluid stirrer 3 ... Gas nozzle pipe 4 ... Connecting member 4a ... Connecting rib 5 ... Gas supply main pipe 6 ... Fluid introduction port 7 ... Discharge port 8 ... Tube 9 ... Gas-liquid stirring mixing means 9a ... Variable flow path structure 9b ... Protrusion 10 ... Semi-elliptical blade 11 ... Partition plate 12 ... Cylindrical body 13 ... Gas inlet 14 ... Gas outlet 15 ... Communication / fixing means 16 ... Nut 17 ... Support member

Claims (1)

A fluid stirrer provided with gas-liquid mixing means inside a tube having a fluid inlet on one side and a discharge port on the other, and a gas on the proximal end side of the tube having a smaller diameter than the tube of the fluid stirrer A gas nozzle pipe having a communication fixing means to the supply main pipe and a discharge port on the tip side, and a discharge port of the gas nozzle pipe are arranged below the gas-liquid mixing means of the fluid agitator via a predetermined space, a coupling member to integrate the gas nozzle pipe and the fluid agitator coaxially to form a fluid passage between the fluid agitator and a gas nozzle pipe, Ri Tona, communication fixed gas nozzle pipe to the gas supply main pipe The gas-liquid mixing device characterized in that the means is a screw portion formed on the shaft body proximal end side of the gas nozzle tube

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