JPH037440B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) This invention is applicable to dams or lakes with relatively large water depths within a certain specific gravity range (for example, upper, middle, and lower layers).
This relates to a multi-stage purification device whose purpose is to aerate each time.

(Prior art/problems to be solved by this invention) Conventionally, it has been known to use an intermittent air pumping tube to improve the water quality of dams or lakes (Patent No.
No. 499563) has been installed in various places and has achieved great effects, but due to its characteristics, the water pumps generate aeration as well as vertical convection in the water in dams, etc., resulting in an almost uniform temperature and uniform dissolved oxygen throughout the entire body. Quantity. Therefore, there is no problem when the water depth is relatively small (for example, about 30 meters deep), but as the water depth increases,
When the water temperature difference between the water surface and the water bottom is large (for example, water temperature difference of 10° C. or more), aeration and stirring will lower the overall water temperature. Particularly in the case of multi-purpose dams that also serve as agricultural water, if the water temperature becomes too low during release, it may have an adverse effect on plants (for example, in the case of paddy rice, it is undesirable for the temperature to drop below 20°C).

(Means for Solving the Problem) However, according to the present invention, air pumping cylinders are installed above and below to generate vertical convection at each predetermined water depth, so aeration and convection are performed at each stage. As a result, the excessive release of water was successful in preventing a drop in water temperature.

That is, according to this invention, the upper end of the lower air pumping tube is connected to the lower end of the upper air pumping tube, the float is connected to the top of the upper air pumping tube, and the lower end of the lower air pumping tube is connected to the upper end of the lower air pumping tube. This multi-stage purification device is characterized in that a weight is attached and a guide for guiding the pumped water in the horizontal direction is provided at the upper part of the lower air pumping cylinder. As mentioned above, in this invention, water pumping tubes are installed at each predetermined water depth, so not only two stages but also three or four stages can be considered, but in practice, two stages are the most common. Presumed. In other words, it may be installed at the same water depth up to a depth of about 20 m, but if the area of the horizontal cross section at a water depth of 30 m becomes more than 30% of the surface area of the water, the water temperature at the bottom gradually decreases and finally reaches 4°C. Therefore, the water surface temperature in summer is 25
According to simple calculations, even if the temperature reaches
Temperatures could reach 10-odd degrees. Generally, when water is discharged as agricultural water, it is preferable that the water temperature is 20°C or higher; therefore, water temperatures below 20°C may have an adverse effect on plants. Therefore, according to this invention, if aeration is carried out separately for the surface water layer at a depth of 25 m or less and the deep water layer at a depth of 25 m or more, it is easy to maintain the water temperature of the discharged water at 20°C or higher (assuming the surface water temperature is 25°C), and moreover, it is possible to maintain the temperature of the discharged water at 20°C or higher (assuming the surface water temperature is 25°C). This allows a sufficient amount of dissolved oxygen to be maintained throughout the period. However, if you start operating the water pump from around March, the bottom water temperature will gradually rise, so the
It has been found that discharged water with a temperature difference of 1 to 2 degrees from the surface water temperature can be obtained around February.

(Function) In the present invention, the water pumps are provided in multiple stages, upper and lower, so that the water circulates according to the depth of each water tank, and there is no fear that the water will mix into other water bodies. Therefore, even in a dam or the like with a large water depth, the drop in temperature of the discharged water can be kept relatively small.

Embodiment 1 Next, the present invention will be explained based on the implementation apparatus shown in FIGS. 2 and 3. The upper water pumping tube 3 in which the air chamber 2 is provided in the lower part of the cylinder 1 and the lower water pumping tube 6 in which the air chamber 5 is provided in the lower part of the cylinder 4 are connected by a connecting material 7 (synthetic resin rod, rope, chain, etc.). ), and a floating chamber 8 is provided on the outer wall of the upper end of the cylinder 1 of the upper water pumping cylinder 3, and a plurality of floats 10, 10 are connected upwardly via a connecting member 9 at a predetermined interval. The length of the connecting member 9 determines the distance between the upper end of the cylindrical body 1 and the water surface 11, and is usually about 2 m to 5 m, but a length of 5 m to 10 m will not cause any problems in terms of operation and effect. Further, an arc-shaped cover 13 is provided above the upper end of the cylinder body 4 of the lower water pumping cylinder 6 via a connecting rod 12.
The lower end of the air chamber of the upper water pump 3 is connected to the upper outer wall of the arcuate cover 13 via a connecting member 7. A weight 15 is connected to the air chamber of the lower water cylinder 6 via a chain 14. This weight 15 cooperates with the floating chamber 8 and the float 10 to maintain the water pump vertically in the water. In the figure, 16 and 17 are air supply hoses, 1
8 and 19 are water suction pipes. In the air chamber of each of the water pumping cylinders, a bottomed inner cylinder 21 is fixed concentrically to the inside of a capped outer cylinder 20 at a predetermined interval, and a bottomed inner cylinder 21 is fixed to the center of the top plate 20a of the outer cylinder 20. A communication pipe 24 between the inside of the inner cylinder 21 and the inside of the cylinder body 1 is penetrated (FIG. 3),
The upper end of the communication pipe 24 is inserted into the cylinder 1 or 4 in FIG. 2, and the lower end is inserted into the bottomed inner cylinder 21, maintaining a predetermined distance from the bottom plate 21a. Therefore, when pressurized air is fed from the air supply hose 16 as shown by arrows 22 and 23 in FIGS. 2 and 3, the pressurized air accumulates at the upper inner side of the crested outer cylinder 20 in FIG. As the water level increases, the water level inside the outer cylinder 20 and the inner cylinder 21 is pushed down. In the above, the inner and outer cylinders 20 and 21 communicate with each other through communication holes 25 provided at equal intervals on the circumference of the upper side wall of the inner cylinder 21.
As described above, the water level in the inner and outer cylinders is
When the air reaches the lower end (dashed line 62), the air accumulated in the inner and outer cylinders flows into the communication pipe 63, 64, and 65.
4 into the cylinder 1 or 4, and a group (air mass 6
6) and continues to rise. So water suction pipe 1
As the air mass 66 rises, water near the lower end of each cylinder 1, 4 is sucked in from 8, 19 as shown by arrows 26, 27 (FIG. 2). In the above, if the air in the inner and outer cylinders has risen completely, the pressurized air from the air supply hose will begin to accumulate from the top of the inner and outer cylinders again, so the air will eventually rise intermittently, but even while the air is not rising, The water continues to rise due to the inertia of the pumped water. For example, if there are air masses 66 at the top and bottom of the cylinder 1 and they rise together, the water between the two air masses 66 will naturally rise as well. The water that has risen inside the cylindrical body 1 as described above is shown by arrows 26, 28, 2
The water circulates and flows as shown by arrows 9 and 30, and the water that rises inside the cylinder 4 circulates and flows as shown by arrows 27, 31, 32, and 33. Therefore, surface water layer part 3 in Figure 1
4 and the deep water layer portion 35 are subjected to the aeration action separately.

Embodiment 2 In the embodiment shown in FIG. 4, the communication pipe 38 of the upper cylinder 37 is inserted inside the lower cylinder 36, and the common air chamber 3
9 is provided at the lower end of the lower cylindrical body 36. Therefore, the crowned outer cylinder 40, the bottomed inner cylinder 41, and the communication pipe 42 that constitute the air chamber 39 have the same structure as in the previous embodiment, but in this embodiment, the communication pipe 38 is inserted into the communication pipe 42. The lower end is interpolated. Therefore, when pressurized air is inserted from the air supply hose 43 as shown by the arrow 44, the water levels in the outer cylinder 40 and the inner cylinder 41 in FIG. When the air in the inner and outer cylinders 40, 41 reaches the point indicated by the arrows 67, 68, 6
The water moves as indicated by arrows 9 and 70, rises as a group within the communication pipes 38 and 42, respectively, and absorbs water from the water suction pipes 46 and 47 as shown by arrows 48 and 49. Therefore, near the upper cylinder body 37 and the lower cylinder body 36, there are arrows 4 and 4, respectively.
8, 50, 51, 52 or arrow 49, 53, 5
Circulating convection as shown in Figures 4 and 55 occurs. In the figure, 56 is a communicating hole, 57 is a float, 58 is a floating chamber, and 59 is a weight.

A closing member 60 (ring-shaped) that is inflated by pressurized air is installed on the outer wall of the crested outer cylinder 40 of the air chamber 39, the inner wall of the lower cylinder 36, and near the opening of the communication pipe 42. If pressurized air is introduced from the air hose 61 and expanded, the upper end opening of the communication pipe 42 can be closed. Therefore, by providing a valve at the proximal end of the air supply hose and supplying pressurized air (closed) or exhausted (opened), aeration by the lower cylinder can be started or stopped. In the first embodiment, the air supply hose 22 or 23
By starting or stopping air supply, aeration of the surface water layer or deep water layer can be controlled.

(Effect of the invention) That is, according to this invention, since the surface water layer and the deep water layer are aerated separately, it is rational to treat only the necessary layers without causing excessive changes in water temperature. .

In the embodiment, when installing the water pump in the flooded layer, a guide plate 75 is provided near the float 10,
This guides the pumped water laterally and causes water in the deep water layer to convect as shown by arrows 76, 77, and 78. still,
If there is no guide plate 75, there is a risk of full-layer convection.

Further, according to the present invention, since the water pumping cylinders are connected to each other on the upper and lower sides, the installation and management are simplified regardless of the separation of the upper and lower aeration systems, and there is an advantage that individual control is also possible.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of the arrangement of the device in the implementation of this invention, FIG. 2 is a front view of the device for implementing this invention, FIG.
The figure is a front view of another implementation device, FIG. 5 is an enlarged cross-sectional view of the vicinity of the upper water suction pipe, and FIG. 6 is an enlarged cross-sectional view of the vicinity of the lower air chamber. 1, 4... Cylindrical body, 2, 5... Air chamber, 3... Upper water pump, 6... Lower water pump, 7, 9... Connecting material, 8... Floating chamber, 10... Float , 13... Arc-shaped cover, 15... Weight, 16, 17... Air supply hose,
18, 19... Water suction pipe, 36... Lower cylinder body, 37
... Upper cylinder body, 38, 42 ... Communication pipe, 39 ...
Air chamber, 43... Air supply hose, 46, 47... Water suction pipe, 57... Float, 58... Floating chamber, 49... Weight.

Claims (1)

[Claims] 1. The upper end of the lower air lifting cylinder is connected to the lower end of the upper air lifting cylinder, a float is connected to the upper part of the upper air lifting cylinder, and the lower end of the lower air lifting cylinder is connected to the upper end of the lower air lifting cylinder. A multi-stage purification device characterized in that a weight is attached and a guide for guiding the pumped water laterally is provided at the upper part of the lower air pumping cylinder. 2. The multi-stage purification device according to claim 1, in which the air chamber of the upper air pumping tube and the air chamber of the lower air pumping tube are common.