JP3366189B2 - Diffuser - 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 for improving the quality of water in lakes and marshes, and more particularly to an aeration device for highly efficient aeration with a small air supply amount.

[0002]

2. Description of the Related Art In an aeration apparatus, if fine air bubbles are diffused over a wide range, a large amount of water can be pumped and circulated with a limited amount of air supply, resulting in high efficiency. Therefore, it is desirable that air diffusion is as low as possible in the range of discharge against water pressure, air pressure is as low as possible, discharge ports are small, and the number of discharge ports is large, but discharge is in position, shape, size, corrosion condition, environment. However, it is extremely difficult to uniformly diffuse air from a large number of discharge ports.
That is, once bubbles are discharged from the discharge port, the bubbles are continuously attracted from the discharge port due to the influence (generation of water flow). On the other hand, when the air pressure in the pipe decreases (due to the discharge from other discharge ports), discharge ports that do not discharge bubbles are generated, and as the air pressure decreases, the proportion of discharge ports that do not discharge bubbles increases, and if the air diffusion becomes uneven. I had no choice. First
FIGS. 0 and 11 show an example of a conventional air diffuser. In this case, air is diffused in the vicinity of the air supply port, and air is not diffused in a distant place.

[0003]

In the conventional aeration apparatus, when the air pressure is lowered, the number of discharge ports that do not discharge bubbles increases and non-uniform air diffusion occurs. Therefore, a large amount of air is sent at a high air pressure. It was necessary and inefficient.

[0004]

In order to solve the above-mentioned problems, the present invention is designed so that even if the air diffuser is divided and the air pressure is lowered, uniform air diffusion is performed for each of the divided air diffusers. Also. The air is intermittently supplied through the switching valve to the divided air diffuser pipes so that the air is uniformly diffused over a wide range without lowering the air pressure or increasing the amount of air sent.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a circular air diffuser is divided by a plurality of partition plates, and an air feed port provided at the center of the air diffuser and the center of each partition of the air diffuser are branched by a branch pipe. Connecting.

A throttle, a throttle valve, or an automatic pressure control valve is attached to each branch pipe. The throttles and throttle valves work by their resistances to equalize the flow rate of air flowing through each branch pipe, and the automatic pressure control valve holds the internal pressure of the divided air diffuser pipes at the set pressure. The throttle valve can correct the imbalance of the diffuser tube by adjusting the throttle.

A switching valve driven by air to be supplied is provided at the air supply port, and each branch pipe is sequentially switched to supply air. Aeration is performed intermittently, resulting in efficient aeration.

[0008]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 is a plan view of an example in which a circular air diffuser tube 1 is divided into eight by eight partition plates 5, and FIG. 2 is a sectional view taken along line AA. The air diffuser 1 and the air supply port 4 provided at the center of the air diffuser 1 are connected by a branch pipe 3 in the center of two adjacent partition plates 5, and air is supplied to each of the divided air diffusers under the same conditions. Is to be supplied.

FIG. 3 shows an example in which a throttle 6a, a throttle valve 6c, or an automatic pressure adjusting valve 6f is attached in the middle of the branch pipe 3, FIG. 4 shows the constitution of the throttle 6a, and FIG. 5 shows the constitution of the throttle valve 6c.
The throttles 6b and 6d determine the amount of air flowing through the branch pipe 3 so that the equal amount of air is supplied to each of the divided air diffusers, and the throttle valve 6c allows the needle valve 6e to move in and out. By adjusting, the imbalance of the air supply amount can be corrected.

FIG. 6 shows the structure of the automatic pressure control valve 6f.
The opening of the vent hole 6i is adjusted by the supply air pressure and the movement of the valve 6g by the pressure adjusting spring 6h, and the internal pressure of each diffuser pipe (pressure on the discharge side)
Is automatically maintained at the set pressure.

FIG. 7 is a perspective view showing an example in which a switching valve 7 driven by air is provided at the air supply port 4, FIG. 9 is a sectional view showing one example of the switching valve 7, and FIG. 8 is an explanatory view. (Part 1 sectional perspective view). The air is sent from the air inlet 4 to the impeller 7 of the switching valve 7.
A is rotated to enter the switching valve body 7d. The impeller 7a decelerates from the coaxial gear 7b via the gear 7c to rotate the switching valve body 7d. The blown air is supplied to the branch pipe 3 when the vent hole 7e provided in the switching valve body 7d and the branch pipe 3 coincide with each other. Although only one vent hole 7e is shown in the drawing, a plurality of vent holes are provided as necessary to intermittently supply air to each branch pipe.

[0012]

The present invention is carried out in the form as described above, and has the following effects.

The circular air diffuser is divided by a plurality of partition plates, and an air supply port provided at the center of the air diffuser and the center of each partition of the air diffuser are connected by a branch pipe to disperse the air diffuser. Since air is supplied to each air diffuser under the same conditions, uniform air diffusion is possible.

By mounting a throttle in the middle of each branch pipe, the amount of air flowing through the branch pipe is determined by the throttle, so that an equal amount of air can be supplied to each of the divided air diffusers. Further, by attaching a throttle valve and adjusting the throttle, it is possible to correct an unbalance in the amount of air flowing through the branch pipe due to the inclination of the air diffuser or the like.

By providing a switching valve driven by insufflation air at the air insufflation port and sequentially switching to each branch pipe to intermittently insufflate air, it is not necessary to lower the air pressure in order to suppress air consumption, so air diffusion is possible. Is stable, and intermittent aeration enables efficient aeration with a smaller amount of air.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing an embodiment in which a throttle, a throttle valve, or an automatic pressure adjusting valve is attached.

FIG. 4 is an explanatory diagram showing a configuration of a diaphragm.

FIG. 5 is an explanatory diagram showing a configuration of a throttle valve.

FIG. 6 is an explanatory diagram showing a configuration of an automatic pressure control valve.

FIG. 7 is a perspective view showing an embodiment provided with a switching valve.

FIG. 8 is an explanatory view (a partial sectional perspective view) of the switching valve.

9A is a vertical cross-sectional view of an example of a switching valve, FIG. 9B is a cross-sectional view taken along line BB of FIG. 9A, and FIG. 9C is a cross-sectional view taken along line CC of FIG.

FIG. 10 is a plan view showing an example of a conventional air diffusing tube.

11 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

1 Air diffuser 2 Discharge port 3 Branch pipe 4 Air supply port 5 Partition plate 6 Throttle 6a or throttle valve 6c or automatic pressure regulating valves 6f, 6b, 6d Throttle 6e Needle valve 6g Valve 6h Pressure regulating spring 6i Vent hole (Automatic pressure control valve) 7 Switching valve 7a Impellers 7b and 7c Gear 7d Switching valve body 7e Vent hole (switching valve body) 8 Strut

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Issei Kimura 1 176-2 Minami Toyoshima, Ikeda City, Osaka Prefecture Zenya Marine Service Co., Ltd. (56) Reference JP-A-6-141733 (JP, A) Kaihei 7-60273 (JP, A) JP-A-9-314169 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 3/20 B01F 3/04

Claims (4)

(57) [Claims] 1. A circular air diffuser is divided by a plurality of partition plates, and an air supply port provided at the center of the air diffuser and the center of each partition of the air diffuser are connected by a branch pipe. An air diffuser. 2. The air diffuser according to claim 1, wherein a throttle or a throttle valve is attached in the middle of each branch pipe. 3. The air diffuser according to claim 1, wherein an automatic pressure adjusting valve is attached in the middle of each branch pipe. 4. The air diffuser according to claim 1, wherein the air supply port is provided with a switching valve driven by air supply air, and air is intermittently supplied to each branch pipe.