JPH11276018A - Aerator - Google Patents

Abstract

(57) [Problem] To provide a conventional aeration apparatus, a vent hole is small and the amount of dissolved oxygen varies, and water flowing down a filler block collides with the bottom of the apparatus to generate air bubbles. It is contained in circulating water and attaches to cultured young fish, causing the young fish to die. In addition, it becomes expensive if dedicated equipment is used. SOLUTION: The material of a commercially available cooling tower device is diverted, and at least a frame, a lower water tank (1), a falling water tank (2), and a filler material placed on a table (1c) lower than the upper end surface of the lower water tank. It comprises a block (3), a gantry (4), a circulating water inlet pipe (5), a circulating water outlet pipe (7) in which an electromagnetic valve (6) is inserted, an overflow pipe (8), and a water level sensor (9). The opening and closing operation by the water level sensor and the solenoid valve, and the overflow pipe, the operating water level is set to a range not less than the minimum water level L necessary for preventing bubbles from being caught in the flowing water and not more than the height of the upper end surface of the lower water tank. An aeration device characterized in that the vicinity of the lower end surface of the block is submerged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple aeration apparatus capable of preventing air bubbles from entering water in a culture pond or the like for growing young fish.

[0002]

2. Description of the Related Art Although an illustration of a conventional water aeration device for aquaculture ponds or the like for growing larvae, etc. is omitted, a vent hole and a circulating water pipe are provided in an FRP tank, and a corrugation is formed inside the tank. A shaped filler block is installed, and the flowing water is aerated by flowing circulating water down the filler block.

[0003]

However, in the above-mentioned conventional aeration apparatus, 1) the amount of dissolved oxygen varies due to insufficient ventilation due to the small vent provided in the FRP tank. ) The circulating water flowing down in contact with the filler block collides with the bottom of the FRP tank, and this generates air bubbles. The air bubbles are transported to the aquaculture pond and the like while being entrained in the circulating water. Bubbles adhere to the juvenile fish and the like, and the juvenile fish and the like die. 3) There is a problem that if a dedicated aeration device is manufactured, it becomes expensive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an aeration apparatus according to the first aspect of the present invention includes a commercially available cooling tower apparatus having a filler block, a fan and a fan mounting member. An aeration apparatus comprising a lid on which traces have been removed and which have been removed, wherein the aeration apparatus is formed at least in a frame, a lower water tank provided with a side plate rising on a peripheral edge, and a concave shape at the bottom of the lower water tank. A dropping water tank, a filler block placed on the bottom and having a height lower than an upper end surface of the side plate rising, a gantry, a circulating water inlet pipe, and the dropping water tank. A circulating water outlet pipe drawn out of the water tank and having an electromagnetic on-off valve inserted therein, an overflow pipe for the lower water tank, and a water level sensor for the lower water tank, and opening and closing of the electromagnetic on-off valve by the water level sensor Operation and from the overflow pipe By the overflow, the water level of the lower water tank during the operation of the aeration apparatus is set to a range not less than the minimum water level L necessary for bubbles not to be caught in the flowing water and not more than the height of the upper end face of the side plate rising, In the minimum water level L, at least the vicinity of the lower end face of the filler block is flooded. That is, this is an aeration apparatus that is simple and prevents bubbles from entering water for use in a culture pond or the like.

Here, the minimum water level L during the operation of the aeration apparatus is
May be an aeration device having a value of about 120 mm.

[0006] Further, in the above aeration apparatus, a louver may be provided outside the filler block.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to FIG. FIG. 1 is an overall schematic diagram showing one embodiment of the aeration apparatus of the present invention. In the aeration apparatus A of FIG. 1, although not shown, there is a frame, 1 is a lower tank, 2 is a drop tank, 3
Is a filler block, 4 is a stand, 5 is a circulating water inlet pipe, 6 is a solenoid on-off valve, 7 is a circulating water outlet pipe, 8 is an overflow pipe for the lower tank, 9 is a water level sensor for the lower tank, and 10 is a fan. And a lid in which the fan mounting member has been removed, and a lid other than the lid 10 is assembled by diverting a member for a commercial cooling tower provided with the filler block 3 and its piping material.

[0008] In the aeration apparatus A, the louvers 11, 1
Although 1 is shown, the louvers 11, 11 are not essential and may be provided as needed.

The aeration device A will be described in detail. Although not shown, the frame may be a commercially available frame for a cooling tower. Next, a lower water tank 1 having a side plate rising 1a on the periphery is placed on the gantry 4, 4, and a bottomed water tank 2 with a concave shape is formed in the approximate center thereof. The height of the side plate rising 1a of the lower water tank 1 is the position of the upper end 1d. In a commercially available cooling tower, the height of the upper end 1d of the side plate rising 1a of the lower water tank 1 is almost constant even if the width and height of the cooling tower are different. In addition, since the depth of the falling water tank 2 requires a space for leading out piping from the side, the lower water tank 1 is usually used.
Is larger than the length of the side plate rising 1a.

A table 1 arranged on the bottom 1b of the lower tank 1
Filler blocks 3 and 3 are placed on c and 1c,
The upper surfaces of the placing tables 1c, 1c, that is, the positions of the lower end surfaces 3b, 3b of the filler blocks 3, 3, are located at the side plate rising 1a of the lower water tank 1.
At a position lower than the upper end 1d.

A circulating water inlet pipe 5 is provided above the aeration apparatus A, and the circulating water flows down onto the filler blocks 3 and 3 through a sprinkling layer on the filler blocks 3 and 3. .
The filler blocks 3 and 3 may be formed by laminating corrugated fillers used in a usual commercially available cooling tower, and may be any as long as the flowing water can sufficiently contact the outside air and be aerated.

A circulating water outlet pipe 7 extends from the side of the falling water tank 5, and an on / off type electromagnetic valve 6 is provided in the middle of the circulating water outlet pipe 7.

Although not shown, the end of the circulating water outlet pipe 7 serves as a water supply pipe to a culture pond for growing young fish and the like, and the beginning of the circulating water inlet pipe 5 serves as a drainage pipe from the culture pond and the like. Circulated by a pump.

The lower water tank 1 is provided with an overflow pipe 8 which opens upward and allows the accumulated water above the opening surface to overflow and escape quickly, and the height of the opening surface is equal to the upper end 1d of the side plate rising 1a. It is almost flush. The other end of the overflow pipe 8 is connected to a secondary circuit of the solenoid valve 6. Further, the lower water tank 1 has a water level sensor 9 of an electrode rod type.
Is provided.

Considering the operating water level of the lower water tank 1, the water level is adjusted by the overflow pipe 8 to the upper end 1a of the side plate rising 1a of the lower water tank 1.
d, the upper end surface 1 of the side plate rising 1a from the minimum water level L necessary for preventing bubbles from being caught in the flowing water by the combination operation of the water level sensor 9 and the solenoid valve 6.
d, and the filler blocks 3, 3 need to be installed so that at least the vicinity of the lower end face 3b of the filler block 3 is flooded even in the case of the minimum water level L. It is.

According to the embodiment, the minimum water level L is set to about 12
0 mm, and the operating water level is set to the minimum water level L (about 120
mm) to the height of the upper end 1 d of the side plate rising 1 a of the lower water tank 1, in all cases during this time, almost no air bubbles are generated in the circulating water flowing down, and even if air bubbles are generated, the lower water tank ( When sinking in 1) and the falling water tank (2), air bubbles were released and completely disappeared.

The louvers 11, 11 usually have a sufficient vent for aerating the flowing water, so that they need to be provided only when necessary. For example, the louvers 11, 11 may be provided for light shielding or dust protection in summer. It is better to remove the louvers 11, 11 when the louvers 11, 11 freeze in the cold winter and block the ventilation holes.

Having described the structure of the aeration apparatus A, the operation of the aeration apparatus A will now be described. In the operation state of the aeration apparatus A, the flowing water from the upper circulating water inlet pipe 5 comes in direct contact with the outside air when flowing down the filler blocks 3, 3, or flows from the ventilation holes of the louvers 1, 1. Fully aerated on contact with air.

The aerated flowing water flows to the lower water tank 1, and the level of the accumulated water in the lower water tank 1 during operation is determined by the overflow pipe 8
And the combined operation of the water level sensor 9 and the solenoid valve 6 makes the water level equal to or higher than the minimum water level L. Even if the water level is the minimum water level L, the vicinity of the lower end surface 3b of the filler block 3 is flooded by the accumulated water. Since the filler blocks 3 and 3 are installed in such a manner that the falling water does not separate from the filler block 3 into the air, it reaches the surface of the pool water in the lower water tank 1 with the pool water as a landing buffer area. Since water is bubbled, bubbles are less likely to be entrained, and even if bubbles are generated, the flowing water is released and disappears during the sinking movement of the buffer area having a depth equal to or greater than the minimum water level L, and furthermore, the falling water tank 2 The bubbles are completely released and disappear during the squatting movement to the position of the circulating water outlet pipe 6 derived from the side surface of the airbag. Therefore, the circulating water outlet pipe 6 does not contain air bubbles, and therefore does not send air bubbles to the aquaculture pond or the like at the end thereof. No adverse effects, such as inconvenience, occur.

[0020]

As described above, according to the present invention, a fan and a fan mounting member are removed from a commercially available cooling tower device having a filler block, and a cover obtained by removing the fan and the fan mounting member is diverted to the lower water tank. By operating the electromagnetic on-off valve provided on the circulating water outlet pipe derived from the side of the falling water tank by the provided water level sensor and by overflowing from the overflow pipe provided on the lower water tank, the operation of the aeration apparatus during operation is performed. The water level of the lower water tank is in the range of not less than the minimum water level for preventing bubbles from being trapped in the flowing water and not more than the height of the upper end face of the side plate rising, and at the minimum water level, at least the vicinity of the lower end face of the filler block is flooded. Since it is possible to provide an aeration apparatus characterized by the following features, it is possible to 1) sufficiently aerate and increase the amount of dissolved oxygen, and 2) air bubbles are less likely to be generated in water circulated through the aeration apparatus. Even if bubbles are generated, the bubbles are released and disappear during the subsequent settling movement in the aeration device of the flowing water and the bubbles can be removed before reaching the circulating water outlet pipe, so the bubbles are not carried to the culture pond Therefore, it is possible to secure a favorable condition for the growth of the juvenile fish and the like without air bubbles adhering to the juvenile fish and the like. 3) Since the member for the commercial cooling tower can be converted and used, the cost of the aeration device can be reduced and the installation work can be simplified. This has the effect.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram showing one embodiment of an aeration apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Aeration device 1 Lower water tank 2 Drop water tank 3 Filler block 4 Stand 5 Circulating water inlet pipe 6 Solenoid valve 7 Circulating water outlet pipe 8 Overflow pipe 9 Water level sensor 10 Cover 11 Louvre

Claims (3)

[Claims] An aeration apparatus (A) comprising a fan and a fan mounting member removed from a commercially available cooling tower device provided with a filler block (3), and a lid (10) on the removed mark. The aeration apparatus (A) includes at least a frame, a lower water tank (1) provided with a side plate rising (1a) on a peripheral edge, and a recessed water tank (2) formed in a concave shape at a bottom (1b) of the lower water tank. And a filler block (3) arranged on the bottom (1b) and having a height lower than an upper end surface (1d) of the side plate rising (1a) and placed on a table (1c).
A pedestal (4), a circulating water inlet pipe (5), a circulating water outlet pipe (7) led out of the sink tank and having an electromagnetic on-off valve (6) inserted therein, and an overflow for the lower tank. A water pipe (8),
A water level sensor (9) for the lower water tank, and the electromagnetic on-off valve (6) by the water level sensor (9).
Opening and closing operation and the overflow from the overflow pipe (8),
The water level of the lower water tank (1) at the time of the operation of the aeration apparatus (A) is not less than the minimum water level L required for preventing bubbles from being caught in the flowing water and the upper end face (1) of the side plate rising (1a).
d) The height is less than or equal to the height of d), and at least the vicinity of the lower end surface (3b) of the filler block (3) at the minimum water level L is flooded. 2. The aeration apparatus according to claim 1, wherein the minimum water level L is about 120 mm. 3. Aeration device according to claim 1, wherein the aeration device (A) also comprises a louver (11) provided outside the filler block (3).