JP3202594B2 - Deep aeration equipment for reservoirs, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a deep aeration apparatus used for improving the water quality of a deep part in a water source reservoir such as a lake or a marsh or a dam, or a water area such as a harbor.

[0002]

2. Description of the Related Art Conventionally, as this kind of deep aeration apparatus,
For example, there is a device described in Japanese Utility Model Laid-Open No. 63-29553.

That is, in this conventional apparatus, as shown in FIG. 5, an apparatus main body 1a has a double cylinder structure of an outer cylinder 2c and an inner cylinder 3b, and an air diffuser 18a is disposed at a lower end of the outer cylinder 2c. And outer cylinder 2c
An exhaust pipe 25a having an exhaust valve 27a is connected to a top surface of the inner cylinder 2c. The dissolved oxygen concentration of deep water in the outer cylinder 2c is increased by fine air bubbles diffused from the air diffuser 18a, and the 3b
From the lower end of the reservoir to the deeper part C 'of the reservoir B' to improve the water quality.

When the concentration of dissolved oxygen in deep water is increased by operating the aeration device for a long time, the amount of oxygen dissolved in the deep water decreases, and excess air gradually increases in the upper part of the outer cylinder 2c. The surplus air is discharged to the atmosphere via the exhaust pipe 25a.

The exhaust pipe 25a has an exhaust valve as described above.
27a is provided, which secures the amount of air accumulated in the upper part of the outer cylinder 2c in order to perform good air-water separation in the apparatus main body 1a, while being discharged from the exhaust pipe 25a together with the air. This is for reducing the amount of deep water.

[0006]

However, in the above-mentioned prior art, the exhaust pipe 25a is provided with an exhaust valve 27a to limit the amount of air exhausted from the exhaust pipe 25a. Excess air that has risen in the inner cylinder 3b without dissolving in the deep water gradually accumulates in the upper part of the outer cylinder 2c. Such a situation also occurs when a foreign matter is clogged in the exhaust pipe 25a.

Therefore, when the amount of accumulated air in the outer cylinder 2c exceeds a certain level, the buoyancy causes the apparatus main body 1a to float inadvertently, and the apparatus main body 1a receives an inertial force and protrudes a considerable amount from the water surface A '. become. At this time, since the inside of the device main body 1a is in a negative pressure state, when atmospheric pressure is applied as an external force thereto,
There has been a great problem that the device main body 1a is deformed or damaged.

That is, in this type of conventional aeration apparatus, although an exhaust means for reducing the amount of air accumulated in the apparatus main body 1a is provided, the apparatus main body 1a which has floated due to an increase in the air accumulation amount or the like is provided. It has no means of protection,
No consideration was given to this point.

[0009] Therefore, the present invention has been made to solve the above-mentioned conventional problems, and in the event that an abnormal situation occurs in which the main body of the aeration apparatus floats up, the apparatus can be properly mounted without damaging the main body. It is an object to be able to protect in

[0010]

That is, the means adopted by the present invention to solve the above-mentioned problems is a deep portion C such as a reservoir B or the like.
A valve 13 is provided on the upper side of the apparatus main body 1 which is arranged at a position above which a fluid can flow in and out by a differential pressure between the inside and the outside of the apparatus main body 1.

Therefore, in the deep aeration apparatus characterized by the above-mentioned structure, when there is a pressure difference between the inside and the outside of the apparatus main body 1, the fluid flows into the inside of the apparatus main body 1 through the valve 13. The fluid flows in or flows out from the inside of the apparatus main body 1 to the outside through the valve 13, and the pressure difference between the inside and the outside of the apparatus main body 1 is eliminated, and a state of equilibrium is established.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an apparatus main body composed of an outer cylinder 2 having a flange 2a at a lower end and having an open bottom surface, and an inner cylinder 3 having an upper end inserted into the outer cylinder 2. A plurality of mounting plates 4 are provided between the outer peripheral surface of the cylinder 3 and the inner peripheral surface of the outer cylinder 2, and a passage 5 is formed between the two.
Are arranged concentrically on the outer cylinder 2.

Reference numeral 6 denotes a disk-shaped baffle arranged to face the upper opening 3a of the inner cylinder 3 via a plurality of mounting rods 7. 8
Is an annular body fixed to the outer peripheral surface of the inner cylinder 3 at predetermined intervals above and below the flange 2a of the outer cylinder 2.

Reference numerals 9 and 10 denote a pair of openings formed on the upper side surface of the outer cylinder 2 so as to face each other. The inner peripheral edge of one of the openings 9 is directed inward toward the lower end as shown in FIG. Tilted annular seat
An annular seat 12 projecting outward from the outer peripheral edge of the other opening 10 toward the lower end is formed on each of the seats 11 and 12, which is called a flap valve. Valves 13a and 13b are mounted. That is, the valves 13a and 13b are provided with hinges 14 at the upper ends of the seats 11 and 12 so as to open and close the openings 9 and 10.
The weight 15 is fixed to the lower end of the valve 13 so that the valves 13a and 13b and the seats 11 and 12 are in contact with each other to achieve sealing.

A plurality of chains 17 are provided at the lower end of the inner cylinder 3.
The weights connected via are shown. Reference numeral 18 denotes an air diffuser tube provided at a lower end portion of the air diffuser tube 18 for supplying air as fine bubbles into the inner cylinder 3, and a compressor (not shown) is connected to the air diffuser tube 18 through an air supply hose 19. .

Reference numeral 20 denotes a hemispherical top surface of the outer cylinder 2 formed by a partition 21.
An annular space provided inside 2b, and the annular space 20 is filled with urethane foam 22.

Numeral 23 denotes a floating exhaust body having a float 24 attached to the outer surface and capable of floating on a water surface A such as a reservoir, and has an exhaust hole (not shown) on the side surface.

Reference numeral 25 denotes an exhaust pipe having a lower end inserted into the center of the top surface 2b of the outer cylinder 2. A pair of upper and lower orifices 26 is provided on the lower outer peripheral surface as shown in FIG. The upper end to which the valve 27 is connected is inserted into the bottom surface of the floating exhaust body 23.

Reference numeral 28 denotes a return pipe whose lower end is inserted into the top surface 2b, and whose upper end is inserted into the bottom surface of the floating exhaust body 24. Reference numeral 29 denotes a receiving tray installed at the lower end portion of the return pipe 28. Reference numeral 30 denotes a rope connected between the weight 17 and the floating exhaust body 24.

The present embodiment has the above configuration.
In this aeration device, the weight 16 is installed at the bottom D of the reservoir B so that the device main body 1 is disposed at a deep portion C such as the reservoir B. At this time, the weight 16 is provided on the outer cylinder 2. One valve 13a is opened by receiving the water pressure of the reservoir B or the like, and water flows into the apparatus main body 1 through the opening 9.

The annular space 20 provided in the outer cylinder 2 of the apparatus main body 1 and the urethane foam 22 filled therein exhibit a float function, and the apparatus main body 1 is maintained in a self-standing state.

Then, the air supply hose 19 is supplied from the compressor.
The air diffused as fine bubbles into the inner cylinder 3 via the diffuser pipe 18 is mixed with the deep water in the inner cylinder 3, whereby the aerated deep water having an increased dissolved oxygen concentration descends through the passage 5. Then, the water is discharged from the apparatus main body 1 to the deep portion C, and the water quality of the deep portion C is improved.

On the other hand, surplus air separated and accumulated in the upper portion of the outer cylinder 2 is discharged into the floating exhaust body 23 through the orifice 26, the exhaust pipe 25 and the exhaust valve 27, and then is discharged from the exhaust hole to the atmosphere. Released. At this time, a part of the deep water rises in the exhaust pipe 25 together with the excess air and flows into the floating exhaust body 23. However, since the deep water is returned to the inside of the apparatus main body 1 again through the return pipe 28. , Deep water is not released to upper areas such as reservoir B.

In this case, for example, if one of the orifices 26 becomes clogged or the dissolved oxygen concentration of the deep water increases and the dissolving capacity decreases, the amount of excess air accumulated in the outer cylinder 2 gradually increases. Will increase.

When the amount of accumulated air exceeds a certain level, the buoyancy increases and the main body 1 rises from the deep portion C, and when the main body 1 jumps out of the water surface A, the inside of the main body 1 is in a negative pressure state. However, since the apparatus main body 1 is provided with the valve 13a, the air in the atmosphere flows into the inside through the valve 13a, and the negative pressure state is eliminated.

Therefore, since no excessive external force is applied to the apparatus main body 1, the apparatus main body 1 is appropriately protected without causing damage such as deformation or breakage.

Thereafter, the apparatus main body 1 is settled again in the reservoir B or the like by its own weight or the weight 16, and the inside of the apparatus main body 1 is in a positive pressure state. In this case, the other valve 13b is opened and its opening is opened. Air will flow out of the inside of the apparatus body 1 from the unit 10.

As described above, the apparatus body 1 is appropriately protected by opening and closing the valves 13a and 13b according to the situation.

Further, since the aeration apparatus according to the present embodiment has a very simple configuration, there is an advantage that the aerator can be manufactured easily and inexpensively.

In the above embodiment, a flap valve is used as the valve 13. However, the present invention is not limited to this. For example, a check valve having a spring as shown in FIG. It is also possible to use. That is, openings 9 and 10 are formed in the top surface 2b of the outer cylinder 2 of the apparatus main body 1, and an inflow port 35 is formed by a spring 36 in one of the openings 9 so that fluid can flow into the apparatus main body 1 from outside. A valve 13a having a valve body 37 that can be closed in a biased state is connected, and the opening 10 is closed in a biased state by a spring 38 so that the fluid in the apparatus main body 1 can flow out to the other opening 10. It connects the valve 13b with a possible valve body 39. In this case, each valve 13a, 13b is
The valve is always closed without being affected by gravity or buoyancy due to the spring action of FIG. 8, and when a pressure difference occurs between the inside and outside of the apparatus main body 1, one of them is opened and the apparatus main body 1 is opened. Will be protected. Also, unlike a general check valve, a check valve having a spring is always kept in a closed state as described above. Therefore, when the openings 9 and 10 are opened on the side surface of the apparatus body 1, Can also be applied. That is, the range in which the openings 9 and 10 can be opened is wider than when a general check valve is employed, and there is an advantage that it is possible to flexibly cope with a change in the shape of the apparatus main body 1 and a change in the internal structure. . still,
In this case, a check valve having an elastic body such as rubber or sponge may be used instead of the spring.

In the above embodiment, a plurality of openings 9 and 10 are provided in the outer cylinder 2 of the apparatus main body 1. However, the specific number of such openings is not limited to this. For example, when only one opening 9 is opened, as shown in FIG.
A rectangular seat 31 is provided on the periphery of the seat 31 so that the valve 13 can be opened and closed.
Is provided to be swingable. Such a valve 13 is formed so as to be thicker toward the lower end side, and its outer peripheral edge is in contact with the inner peripheral surface of the seat 31 to achieve sealing, but in this case, there is an advantage that the entire configuration can be simplified. is there.

Also, in place of the valve 13 as described above, FIG.
As described above, the opening 9 may be closed by a lid 33 made of a material having a lower strength than the apparatus main body 1, and the lid 33 may be fixed to the seat 31 by an annular body 34. With this configuration, when the apparatus main body 1 floats, the lid 33 is damaged first, and air in the atmosphere flows into the inside of the apparatus main body 1 from the opening 9 to protect the apparatus main body 1. It will be.

In addition, the outer cylinder 2, the inner cylinder 3, and the floating exhaust body 23
The specific configuration of each part of the aeration apparatus such as the above can be freely changed in design within the range intended by the present invention.

[0035]

As described above, according to the present invention, since a valve capable of flowing in and out of a fluid by a differential pressure between the inside and outside of the apparatus main body is provided on the upper side of the apparatus main body, the present invention is applied to the apparatus through such a valve. The inflow and outflow of the fluid makes it possible to quickly bring the pressure inside and outside the apparatus main body into an equilibrium state.

Accordingly, for example, when the apparatus body inadvertently floats from a deep part such as a reservoir, air in the atmosphere flows into the inside of the apparatus body which is in a negative pressure state by opening the valve. The state is eliminated, and no excessive external force is applied to the apparatus main body unlike the conventional deep aeration apparatus having no such valve.

Further, the floated apparatus main body sinks again into a reservoir or the like, and the inside of the apparatus main body is in a positive pressure state. In this case, however, the internal air flows out to the outside via a valve, and the positive pressure state occurs. Will be eliminated.

As described above, according to the present invention, since the valve opens and closes according to the situation due to the differential pressure between the inside and outside of the apparatus main body, it does not cause damage such as deformation or breakage to the apparatus main body.
The special effect that the device main body can be appropriately protected has been obtained.

Further, since the deep aeration apparatus according to the present invention has a very simple structure, there is also a practical effect that it can be manufactured easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a cross-sectional front view of a main part showing another embodiment.

FIGS. 4A and 4B are enlarged cross-sectional views of a main part showing another embodiment.

FIG. 5 is a partial cross-sectional front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Device main body 9 ... Opening 10 ... Opening 13 ... Valve 13a ... Valve 13b ... Valve 33 ... Lid B ... Reservoir C ... Deep part

Claims (6)

(57) [Claims] A valve (1) capable of flowing in and out of a fluid by a differential pressure between the inside and outside of the apparatus main body (1) is provided on an upper side of the apparatus main body (1) disposed in a deep part (C) such as a reservoir (B). 13) A deep aeration device for a reservoir or the like, which is provided with 13). 2. An opening (9) at the upper side of the apparatus main body (1).
The deep aeration apparatus for a reservoir or the like according to claim 1, wherein a valve (13) is provided on the apparatus body (1) so as to be swingable so as to open and close the opening (9). 3. Openings (9) and (10) are opened on the upper side of the apparatus body (1) disposed in a deep part (C) such as a reservoir (B), and one of the openings (9). A valve (13a) through which a fluid can flow into the interior due to a differential pressure between the inside and outside of the apparatus main body (1) is provided so as to be openable and closable, and the other opening (10) is provided in the apparatus main body (1).
A deep aeration device for a reservoir or the like, characterized in that a valve (13b) capable of allowing a fluid to flow out to the outside by a differential pressure between the inside and the outside is provided so as to be openable and closable. 4. The deep aeration apparatus for a reservoir or the like according to claim 3, wherein said valves (13a) and (13b) are check valves having an elastic body capable of maintaining the valve closed state. 5. The deep aeration apparatus for a reservoir or the like according to claim 3, wherein the valves (13a) and (13b) are flap valves rotatably provided on the apparatus body (1). 6. An opening (9) is opened on the upper side of an apparatus main body (1) disposed in a deep part (C) such as a reservoir (B), and the opening (9) is provided in the apparatus main body. In order to protect the device body (1) from the external force applied by the differential pressure between inside and outside of (1), the device body (1)
A deep aeration device for a reservoir or the like, wherein the deep aeration device is closed by a lid (33) made of a material having lower strength.