JP2522730B2 - Aeration device that also generates liquid flow - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration device that also serves to generate a liquid flow. More specifically, the present invention relates to an apparatus that can efficiently stir or pressure-feed a liquid while generating fine bubbles in the liquid.

[0002]

2. Description of the Related Art An aeration device for introducing a gas such as air into a liquid is widely used in a live fish tank, a sewage tank, and an activating device for a lake or the like. When these water tanks are small, agitation is performed only by the aeration device to some extent, but when the devices are large, agitation is not sufficiently performed and liquid flow does not occur. Therefore, in the live fish tanks and the like currently put into practical use, in addition to an aerator for supplying oxygen, a liquid flow generator is separately provided for circulating and pumping the liquid in the tank. Therefore, there is a problem that the device becomes large. Therefore, an object of the present invention is to provide a simple device capable of performing aeration and liquid flow in a water tank.

[0003]

SUMMARY OF THE INVENTION The inventors of the present invention have installed a simple aerator, which has already been developed by one of the present inventors, by mounting an impeller for liquid flow generation coaxially with an impeller for gas introduction, thereby reducing the size of the apparatus. We succeeded in reducing the weight and completed the present invention.

That is, according to the present invention, a self-priming aerator which introduces air as fine air bubbles by utilizing a negative pressure generated on the back surface of a rotating impeller, and coaxially with the impeller of the aerator. An aerator which also has a liquid flow generation impeller for mounting the liquid flow.

[0005]

The structure of the present invention will be described below with reference to the accompanying drawings showing an embodiment. The aeration apparatus of this embodiment is shown in FIG.
FIG. 1A is a front sectional view, and FIG. 1B is AA of FIG.
As shown in the cross-sectional view, a rotatable drive shaft 6, an impeller 7 fixed to the lower part of the drive shaft along the drive shaft 6, a lower end of the impeller 7 keeps a gap 8 with an upper end of the impeller 7 , and It is composed of an outer pipe 9 which penetrates the shaft 6 with a space therebetween.

An impeller 10 for coaxially generating a liquid flow is installed coaxially at the lower end of the impeller attached to the drive shaft 6, and the impeller 10 sucks the water in the water tank 2 when the impeller 10 rotates. It is covered with an outer cylinder 13 having a port 11 and a discharge port 12 for discharging the sucked water. The outer cylinder 13 is connected and supported to the outer pipe 9 by four support rods 14a, 14b, 14c and 14d. ing.

When the drive shaft 6 rotates due to the rotation of the motor 15 as a power source and the impeller 7 rotates, a negative pressure is generated on the back surface of the impeller 7. Air is sucked from the space 16 between the motor 15 and the outer pipe above the outer pipe 9 toward this negative pressure, and bubbles are intensely generated. The bubbles diffuse out of the frame formed by the outer pipe 9, the support rods 14a to 14d, and the outer cylinder 13 and spread to the entire upper area around the outer pipe 9 and rise.

On the other hand, the rotation of the impeller 10 at the lower end of the drive shaft 6 produces a liquid flow in which water is sucked from the suction port 11 of the lower outer cylinder 13 of the aeration device 4 and discharged from the discharge port 12. That is, the lower outer cylinder portion of the aeration device 4 functions as a pump that generates a liquid flow. The liquid flow generated here may be circulated in the water tank as it is to stir the water tank, or a pipe (not shown) connected to the outlet 12 may be introduced to the outside for purification treatment and then in the water tank. May be recycled.

[0009]

[Modification of aeration device] As the air introduction part of the aeration device of the present invention, a system in which air is sucked toward the negative pressure generated on the back surface of the impeller can be used. Air is sucked in through the holes of the cylindrical pipe (Japanese Patent Laid-Open No. 59-160516), and a gas injection hole is formed in the back of the hollow box-shaped impeller fixed to the ventilation hole of the cylindrical pipe ( Japanese Patent Laid-Open No. 59-203693), one in which a gas ejection port is spirally attached to a cylindrical pipe along the back surface of an impeller spirally attached to a cylindrical pipe (Japanese Patent Laid-Open No. 60-114331), etc. A device developed by the inventors can be used.

All of these aeration devices are self-priming type,
A large amount of gas can be generated in the liquid as ultrafine air bubbles, and because of the structure that applies the negative pressure generated on the back surface of the impeller in the rotating direction, a strong vacuum pressure is generated in the liquid and the gas can be generated with a small amount of energy. Can be sucked into the liquid, and because air is atomized into the liquid to mix it in the liquid, the efficiency of oxygen dissolution can be increased.It has an extremely simple structure, can be easily disassembled and assembled, and is oil-free. Since it is a mold, it has excellent features such as very easy handling.

A specific example using the apparatus of the present invention will be described. 2 (a), (b) and (c) are a plan view, a front sectional view and a side sectional view of an example of a container system for transporting live fish, which incorporates the device shown in FIG. The container 1 is composed of a water tank portion 2 for storing live fish and a septic tank portion 3, and the septic tank portion 3 has an aeration device 4 of the present invention which also functions as a liquid flow generator.
And a filtering device 5 are provided.

As described above, air bubbles are generated when air is sucked from the space 16 between the motor 15 and the outer pipe above the outer pipe 9 toward the negative pressure generated on the back surface of the impeller 7 by the rotation of the impeller 7. Is the outer pipe 9 and the support rod 14a
.About.14d and the outer cylinder 13 diffuse to the outside of the frame and spread to the entire upper area around the outer pipe 9 and rise. Air bubbles are collected around the outer pipe by the shade-shaped baffle 17 (see FIGS. 2 (b) and 2 (c)) while adsorbing organic substances derived from live fish feed and excrement on the surface and along the outer pipe. The air is discharged from the upper part of the baffle plate 17 through the bubble outlet part 18.

The aeration unit 4 storage unit and the filtration unit 5 storage unit of the septic tank unit 3 are separated by a partition plate 19 whose lower end is opened with a constant width, and a partition wall 20 between the filtration unit storage unit and the water tank unit is provided. A large number of holes 21 are provided in the upper part.

The liquid flow due to the rotation of the impeller 10 at the lower end of the drive shaft 6 passes through the lower opening area of the partition plate 19 and the filter medium portion of the filtering device 5, and then the hole 2 of the partition wall 20.
Return to the water tank section 2 through 1. That is, the water in the water tank portion 2 flows from the suction port 11 to the discharge port 12 of the lower outer cylinder 13 of the aeration device 5.
The filter medium portion of the filtration device 5 is lifted, passes through the hole 21, and is circulated to the water tank portion 2.

The filter material used in the filtration device is a zeolite for adsorbing nitrogen-containing compounds such as ammonia, culturing nitrifying bacteria, breeding, activated carbon and ceramics, bacterite for mineral water, and a filter for removing solid matters. Materials such as cloth may be used in an appropriate combination. For example, a combination in which granular zeolite, granular bacterite and granular activated carbon are installed in three stages from the bottom may be used.

[0016]

The present invention provides a self-priming aerator in which air flows toward the negative pressure generated on the back surface of an impeller, and an aerator that is equipped with an impeller for liquid flow generation and also serves as liquid flow generation. Is.

According to the device of the present invention, it is not necessary to provide a separate liquid flow generator for circulating and pumping the liquid in the water layer, and the device is small, lightweight and space-saving, and oxygen can be stored in one device. Supply and liquid pumping and circulation can be done at the same time, for example, oxygen can be supplied and water flow can be generated at the same time in a live fish tank. Oxygen supply, water flow generation and circulation, and separation of bubbles generated by one device. As a result, effects such as the ability to remove harmful gases, suspensions, organic substances, harmful bacteria, etc. in water are achieved.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view (a) and an AA cross-sectional view (b) of an example of an aeration device that also serves to generate a liquid flow according to the present invention.

FIG. 2 is a plan view (a) of a live fish transport container system using the aeration device of the present invention that also serves as a liquid flow, and BB thereof.
It is sectional drawing (b) and CC sectional drawing (c).

[Explanation of symbols]

 1 Container 2 Water Tank Section 3 Purification Tank Section 4 Aeration Device 5 Filtration Device 6 Drive Shaft 7 Impeller 8 Gap 9 Outer Pipe 10 Impeller (for Liquid Flow Generation) 11 Water Intake Port 12 Water Outlet 13 Outer Cylinder 14a Support Rod 14b Support Rod 14c Support bar 14d Support bar 15 Motor 16 Space part 17 Baffle plate 18 Bubble outlet part 19 Partition plate 20 Partition wall 21 Hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuzaburo Sato 5-22-7 Kamitada, Nakano-ku, Tokyo (56) References JP-A-53-125965 (JP, A) Jitsuko Shou-56-48400 (JP) , Y2)

Claims (1)

(57) [Claims] 1. A self-priming aerator that introduces air as fine bubbles by using negative pressure generated on the back surface of a rotating impeller, and a liquid flow generating impeller mounted coaxially with the impeller of the aerator. And an aerator that also functions as a liquid flow generator.