JP3600004B2 - Aeration device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a simple aeration apparatus that can prevent air bubbles from entering water in a culture pond or the like that grows young fish and the like.
[0002]
[Prior art]
A conventional aeration device for water for aquaculture ponds or the like for growing young fish and the like is not shown, but a vent block and a circulating water pipe are provided in an FRP tank, and a filler block in which a corrugated shape is formed inside the tank. Is installed, and the flowing water is aerated by flowing the circulating water down the filler block.
[0003]
[Problems to be solved by the invention]
However, in the conventional aeration apparatus, 1) the amount of dissolved oxygen varies due to insufficient ventilation due to the small vent provided in the FRP tank, and 2) the dissolved oxygen flows down in contact with the filler block. The circulating water collides with the bottom of the FRP tank and generates air bubbles. The air bubbles are transported to the cultivation pond and the like while being caught in the circulating water. 3) There is a problem that it becomes expensive if a dedicated aeration device is manufactured.
[0004]
[Means for Solving the Problems]
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 removes a fan and a fan mounting member from a commercially available cooling tower apparatus having a filler block, and covers the mark after the removal. An aeration device comprising:
The aeration device is at least a frame, a lower water tank provided with a side plate rising on the periphery, a concave water tank formed in a concave shape at the bottom of the lower water tank, and a height provided at the bottom and arranged on the bottom. A filler block placed on a stand lower than the upper end surface of the base, a pedestal, a circulating water inlet pipe, and a circulating water outlet pipe that is led out of the sink tank and has an electromagnetic on-off valve inserted therein, The lower water tank is provided with a water level sensor for the lower water tank, and the lowering of the aeration device during operation is performed by the opening / closing operation of the electromagnetic on-off valve by the water level sensor and the overflow from the water pipe. The water level of the water tank is in 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, and at least the lower end face of the filler block at the minimum water level L Characterized in that the near are flooded. That is, this is an aeration device that is simple and prevents bubbles from entering water for use in a culture pond or the like.
[0005]
Here, the aeration apparatus may have a minimum water level L of about 120 mm when the aeration apparatus is operated.
[0006]
Further, in the aeration apparatus, the louver may be provided outside the filler block.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
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 water tank, 2 is a dropping water tank, 3 is a filler block, 4 is a gantry, 5 is a circulating water inlet pipe, and 6 is a circulating water inlet pipe. Electromagnetic on-off valve, 7 is a circulating water outlet pipe, 8 is an overflow pipe for the lower water tank, 9 is a water level sensor for the lower water tank, and 10 is a lid made by removing the fan and the fan mounting member, other than the lid 10 Is assembled by diverting a member for a commercial cooling tower having the filler block 3 and its piping material.
[0008]
Although the louvers 11, 11 are shown in the aeration apparatus A, the louvers 11, 11 are not essential and may be provided as needed.
[0009]
The aeration apparatus 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 at the periphery is placed on the gantry 4, 4, and a bottomed falling water tank 2 which is recessed and formed substantially in the center thereof is formed. 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, the depth of the falling water tank 2 is generally larger than the length of the side plate rising 1a of the lower water tank 1 because a space for leading the pipe from the side surface is required.
[0010]
The filler blocks 3, 3 are placed on the tables 1c, 1c arranged on the bottom 1b of the lower water tank 1, and the upper surfaces of the tables 1c, 1c, that is, the lower end faces 3b, 3b of the filler blocks 3, 3 are placed. The position 3b is lower than the upper end 1d of the side plate rising 1a of the lower water tank 1.
[0011]
A circulating water inlet pipe 5 is provided above the aeration device A, and the circulating water flows down onto the filler blocks 3 and 3 via 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 falling water can sufficiently contact the outside air and be aerated.
[0012]
A circulating water outlet pipe 7 is led out from the side surface 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.
[0013]
Although not shown, the end of the circulating water outlet pipe 7 serves as a water supply pipe to a culture pond or the like for growing young fish and the like, and the beginning of the circulating water inlet pipe 5 also serves as a drainage pipe from the culture pond or the like, and is pumped. Circulated.
[0014]
The lower water tank 1 is provided with an overflow pipe 8 which is opened upward and overflows and escapes accumulated water higher than the opening surface thereof, and the height of the opening surface is substantially flush with the upper end 1d of the side plate rising 1a. There is. The other end of the overflow pipe 8 is connected to a secondary circuit of the solenoid valve 6. Further, an electrode rod type water level sensor 9 is provided in the lower water tank 1.
[0015]
Considering the operating water level of the lower water tank 1, the water level is maintained by the overflow pipe 8 at a level not higher than the height of the upper end 1d of the side plate rising 1a of the lower water tank 1, and the combined operation of the water level sensor 9 and the solenoid valve 6 causes the flowing water to flow down. Is controlled within a range from a minimum water level L necessary for preventing air bubbles from being trapped in the upper surface 1d of the side plate rising 1a, and at least a lower surface of the filler block 3 even when the minimum water level L is attained. It is necessary to install the filler blocks 3 and 3 so that the vicinity of 3b is flooded.
[0016]
According to the embodiment, when the minimum water level L is about 120 mm and the operating water level is further changed from 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, almost no air bubbles are generated in the circulating water that has flowed down, and even if air bubbles are generated, the air bubbles are released when the lower water tank (1) and the falling water tank (2) are settled. Has disappeared.
[0017]
The louvers 11, 11 usually have a vent hole enough to aerate the flowing water, so that they only need to be provided when necessary. For example, they may be provided for shading in the summer or dustproofing, etc. When the louvers 11, 11 freeze in the winter of the ground and obstruct the ventilation holes, it is better to remove the louvers 11, 11.
[0018]
Having described the configuration 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 water flowing down from the upper circulating water inlet pipe 5 comes into direct contact with the outside air when flowing down the filler blocks 3, 3, or from the ventilation holes of the louvers 1, 1. Fully aerated in contact with air.
[0019]
The aerated flowing water flows to the lower water tank 1, but the level of the accumulated water in the lower water tank 1 during operation is equal to or higher than the minimum water level L due to the combined operation of the overflow pipe 8, the water level sensor 9, and the solenoid valve 6. Even if the minimum water level is L, the filler blocks 3, 3 are installed so that the vicinity of the lower end surface 3b of the filler block 3 is flooded by the accumulated water. Since the accumulated water is applied to the surface of the accumulated water in the lower water tank 1 as a landing buffer area without separating from the material block 3 into the air, bubbles are less likely to be entrained. Bubbles are released and disappear during the sinking movement of the buffer area having a depth equal to or greater than the minimum water level L, and the bubbles are further reduced while moving down to the position of the circulating water outlet pipe 6 drawn out from the side surface of the sink tank 2. Is completely released and disappears That. Therefore, no air bubbles are contained in the circulating water outlet pipe 6 and, therefore, no air bubbles are sent to the aquaculture pond or the like at the end thereof. No adverse effects, such as inconvenience, occur.
[0020]
【The invention's effect】
As described above, in the present invention, the fan and the fan mounting member are removed from a commercially available cooling tower device equipped with a filler block, and the cover with the removed mark is diverted, and the water level sensor provided in the lower water tank is used. By opening and closing the electromagnetic on-off valve provided on the circulating water outlet pipe derived from the side of the falling water tank, and by overflowing from the overflow pipe provided on the lower water tank, the water level of the lower water tank during operation of the aerator is adjusted. The range is not less than the minimum water level for preventing bubbles from being caught in the flowing water and is not more than the height of the upper end face of the side plate rising, and that at least the lower end face of the filler block is inundated at the minimum water level. Since an aeration apparatus having a feature can be provided, 1) sufficient aeration can be performed to increase the amount of dissolved oxygen, and 2) bubbles are less likely to be generated in water circulated through the aeration apparatus and bubbles are generated. Even if the water flows down, the bubbles will be released and disappear during the subsequent settling movement in the aeration device, and the bubbles can be removed before reaching the circulating water outlet pipe, so that the bubbles will not be carried to the cultivation pond, and therefore young fish etc. Air bubbles do not adhere to the surface, and a good condition for the growth of juvenile fish can be ensured. 3) Since a commercially available cooling tower member can be diverted, the cost of the aerator can be reduced and the installation work can be simplified. .
[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]
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 Flood water pipe 9 Water level sensor 10 Cover 11 Louvre

Claims (3)

An aeration apparatus (A) comprising a commercially available cooling tower apparatus provided with a filler block (3), wherein a fan and a fan mounting member are removed and a lid (10) is placed on the removed mark, wherein the aeration apparatus (A) is provided. ) Includes at least a frame, a lower water tank (1) provided with a side plate rising (1a) on the periphery, a concave water tank (2) formed in a concave shape at the bottom (1b) of the lower water tank, and the bottom ( A filler block (3) disposed on a mounting table (1c) which is arranged on the side plate rising (1a) and is lower than the upper end surface (1d) of the side plate rising (1a); 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, an overflow pipe (8) for the lower tank, And a water level sensor (9) for the lower water tank. The opening and closing operation of the on-off valve (6) and the overflow from the overflow pipe (8) reduce the water level of the lower water tank (1) during the operation of the aeration apparatus (A) so that bubbles are not caught in the flowing water. The range is not less than the required minimum water level L and not more than the height of the upper end face (1d) of the side plate rising (1a). At the minimum water level L, at least the vicinity of the lower end face (3b) of the filler block (3) is flooded. An aeration apparatus characterized in that: 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 or 2, characterized in that the aeration device (A) also comprises a louver (11) provided outside the filler block (3).

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