JPH09250127A - Preventive fence against proliferation of plankton in lake water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically and efficiently purify water in a water reservoir or the like, by connecting a sheet to the lower end of floats to form a fence and forming the lower end of fence so as to be vertically movable. SOLUTION: When the clearance between the lower end of a fence 1 supported by a plurality of foamed styrol floats 3 and the lake bottom, becomes narrow owing to the fall of water level, air is led to an air chamber 4 at the upper stage through an air pipe 7. The upper stage air chamber 4 expands and floats up while bending a polyester sheet 2 and the length of the fence 1 under the water level gets shorter. When the length under the water level can not be sufficiently shortened only by bending a part of the sheet 2 because of the floating-up of the upper stage air chamber 4, further, air is led to the second air chamber 4 from the uppermost chamber to make the sheet float and moreover bend the sheet. In this way, since damage of the fence can be avoided, water in a water reservoir or the like can be economically and efficiently purified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fence having an adjustable underwater length, and more particularly to a fence capable of adjusting the underwater length according to a decrease in water level, a shortage of water, and a discharge of water. Further, the present invention relates to a plankton growth prevention defence for water and lake water (hereinafter referred to as lake water) in a reservoir and lake containing plankton, and in particular, to stop the growth of plankton that survives in the water of the reservoir and the water of the lake. The present invention relates to a plankton growth prevention method and apparatus therefor.

[0002]

2. Description of the Related Art Conventional purification treatment of lake water containing plankton, for example, purification treatment of lake water containing floating microorganisms in the lake water, that is, plankton, is performed by installing a fence having a height of 5 m on the river to improve the upstream lake water. It is made to flow downstream through the deep layer. In this method, the surface water of the lake water is separated by a fence, and the lake water containing a large amount of nutrients is made to flow under the fence where the light does not reach, thereby suppressing the outbreak of phytoplankton. However, for phytoplankton such as formium, it is necessary to increase the length of the fence, and the length of the fence tends to be larger in order to effectively generate and propagate phytoplankton. It is in.

[0003]

However, since the conventional fence has a constant length under the water surface, it is difficult to deal with the fluctuation of the water level. For example, when the water level drops,
For example, the distance between the tip of the fence and the bottom of the lake becomes smaller, and the load due to the flow increases, which is a problem.
In addition, at the time of drought, it dries up on the soil surface and is buried in the earth and sand,
This is a problem because the damage to Fence is large. In addition, the load on the fence increases when water is discharged, which is a problem. The present invention
The problem is that the length of the fence below the water surface is constant. The purpose is to solve the problem.

[0004]

DISCLOSURE OF THE INVENTION The present invention allows generation of phytoplankton in lake water, which makes it possible to adjust the length of a fence and shorten the length of fluence depending on the time of water level drop, drought, and flood. It is intended to provide a protective fence. That is, the present invention, in a plankton growth prevention fence for lake water connecting the sheet to the lower end of the float, a fence for plankton growth prevention fence for lake water, wherein the bottom end of the fence is formed so as to be able to be pulled upward. In addition, the present invention is a fence for preventing plankton growth of lake water, in which a sheet is connected to the lower end of a float, an air chamber connected to an air pipe is provided below the float, and the sheet is foldable. It is a fence for preventing the growth of plankton in lake water. Furthermore, the present invention, in a plankton growth prevention fence for connecting lake water to a lower end of a float, an air chamber connected to an air pipe is provided below the float, and the sheet is formed to be foldable. An accommodation portion for air piping connected to the air chamber is formed at both end portions, and the accommodation portion for the air piping is provided with a connection opening portion and a connection edge portion on the outside. A fence for preventing the growth of plankton in lake water that connects a sheet to the lower end of the float.In a fence for preventing the growth of plankton in lake water, an air chamber that connects to an air pipe is provided below the float to make the sheet foldable. At both ends of the fence, there is formed an accommodation portion for an air pipe that connects to the air chamber. Connected to the connection aperture of the tube housing unit, in Lake proliferation prevention fence plankton, characterized in that the connecting edges are connected through the connector and connecting the edges of the adjacent.

In the present invention, the terms of lake water are:
It means water in lakes and rivers, and the term plankton means dinoflagellates, green algae, cyanobacteria, diatoms and Euglena and so on, and other so-called water-blooms, organisms that cause red tide. In the present invention, Fuens partitions the upper layer of the lake water containing plankton by suspending a fence in the lake water to keep the lake water at a depth at which light does not reach and at a water temperature of 18 ° C.
By passing through the following low temperature region, the generation of phytoplankton is suppressed, the mixing of upper and lower layers of lake water is avoided, and eutrophication of lake water is blocked. In the present invention, in order to guide the lake water to such an area, the position of the lower end of the fence is determined by measuring the underwater depth and the water temperature of the reservoir, the lake and the river to which the fence is attached. preferable. However, in general, at a depth where light does not reach,
In order to reach the lower end of the fence in the region where the water temperature is 18 ° C. or lower, it is preferably 5 to 8 m from the surface of the lake water, although it depends on the season and weather conditions.

In the present invention, since the sheet forming the fence is formed by connecting sheets of unit length, both ends are reinforced by reinforcing members, and the reinforcing members are used for connecting the reinforcing members. A hole or the like for tying through a string or the like is formed. In the present invention, a weight for vertically suspending the fence is attached to the lower end of the fence. In the present invention, the sheet is provided with reinforcing members in the horizontal and vertical directions so that wrinkles are not formed. The present invention blocks the upper part of the flow of lake water on the upstream side of the flow of lake water including plankton, and guides the flow of lake water to a depth in a temperature range of 18 ° C or less at a depth that light does not reach, Since it flows to the downstream side, it is possible to suppress the growth of plankton in the lake water.

In the present invention, the fens is formed so that its length under the water surface is variable. For example, when the fence is formed to be bendable and the air chamber is attached to the sheet or the joint between the sheets, air can be introduced into the air chamber and the joint can be lifted above the water surface by the buoyancy of the air chamber. Since the sheet of Fence is foldable, the length below the water surface of the fence can be adjusted by suspending it under the water surface in the state of being folded in double or triple. According to the present invention, when the water level is lowered, when the water level is low and when the water level is low, the length below the water surface of the fence can be shortened, and the lower end of the fence can be largely separated from the bottom of the river or lake. In addition, it is possible to avoid damage to the fens when the water is drought and when water is discharged.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the accompanying drawings, but the present invention is not limited to the following description and examples. FIG. 1 is a partial explanatory view showing an outline of an embodiment of the plankton growth-preventing pheno of the present invention. FIG. 2 shows FIG.
FIG. 7 is a schematic side sectional view showing an air chamber as a center in the example of FIG. FIG. 3 is an explanatory diagram illustrating a usage state of the fence shown in FIGS. 1 and 2. 1 to 3, corresponding parts are designated by the same reference numerals.

[0009]

EXAMPLE In FIG. 1, a fence 1 is formed of a polyester sheet 2, supported by a plurality of Styrofoam floats 3, and suspended below the surface of a reservoir, lake or river. In this example, the polyester sheet 2 has a width of 5 m for easy assembly.
A plurality of small polyester sheets measuring 1.5 m in length,
It can be formed by connecting vertically and horizontally.

In this example, a plurality of air chambers 4 are horizontally mounted on the sheet 2 so as to be surrounded by a covering sheet 5. In the air chamber 4, an air pipe 7 that is passed through the pipe housing portion 6
Are connected, and the air pipes on the side of Fence 1 and the side of Fence 1'are connected by an air coupler 8. For example, attach a male air coupler to each pipe end on one side, attach a female air coupler to each pipe end on the other side, insert a male air coupler into the female air coupler, Connect the pipes. The connection between the fences 1 and 1'is connected to the respective holes 10 in the end 9 of the seat 2 through ropes 11. Seat 2 has air chamber 4
Are provided in the horizontal direction, when air is introduced into the air chamber 4 through the air pipe 7 to inflate the air chamber 4, the buoyancy of the air chamber 4 acts on the entire seat 2 and the seat 2 Bend and hang down between the air chambers 4. In this example, the introduction of air into the air chambers can be performed for each air chamber.

Since this example is constructed as described above,
When the water level decreases and, for example, the distance between the lower end of the fence and the lake bottom becomes smaller, air is introduced into the upper air chamber 4. The upper air chamber 4 is inflated by the air, and the sheet 2 is bent and floated up, and the length of the fluence below the water surface can be shortened accordingly (FIG. 3). When the upper part of the air chamber 4 is lifted up and the length below the water surface cannot be shortened by simply bending a part of the seat 2, air is further introduced into the second air chamber 4 from the upper side, The second air chamber 4 can be inflated and lifted up by the air, and the sheet 2 can be further folded to shorten the length of the fluence below the water surface accordingly.

[0012]

INDUSTRIAL APPLICABILITY The present invention relates to a fence for preventing plankton growth in lake water, in which a sheet is connected to a lower end of a float, and an air chamber connected to an air pipe is provided below the float, and the sheet is formed to be foldable. Therefore, by introducing air into the air chambers and causing them to float, the sheet is in a bent state, and the length below the water surface of the fence can be shortened. According to the present invention, it is possible to avoid damage to the fluence when the water level is low, when the water level is low, and when water is out, which is difficult to avoid with conventional fluence. Fence can last longer. Therefore, the present invention makes it possible to purify liquid such as water in a reservoir or a lake economically and highly efficiently as compared with a conventional device.

[Brief description of drawings]

FIG. 1 is a partial explanatory view showing the outline of an embodiment of a plankton growth-preventing phenus of the present invention.

2 is a schematic side cross-sectional view mainly showing an air chamber in the embodiment of FIG. 1. FIG.

FIG. 3 is an explanatory diagram illustrating a usage state of the fence shown in FIGS. 1 and 2.

[Explanation of symbols]

 1 Fence 2 Polyester Sheet 3 Float 4 Air Chamber 5 Cover Sheet 6 Piping Housing 7 Piping 8 Air Coupler 9 Edge of Seat 2 10 Hole 11 Rope

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiro Haraguchi 6163-3 Totoro-cho, Nobeoka-shi, Miyazaki Kiyomoto Iron Works Co., Ltd. (72) Yoshihiko Iwasaki 6163-3 Totoro-cho, Nobeoka, Miyazaki Prefecture Kiyomoto Inside the Iron Works Co., Ltd.

Claims (4)

[Claims] 1. A fence for preventing the growth of plankton of lake water, comprising a sheet connected to the lower end of a float, wherein the lower end of Fence is formed so as to be able to be pulled upward. 2. A fence for preventing the growth of plankton of lake water in which a sheet is connected to the lower end of the float, wherein an air chamber connected to an air pipe is provided below the float, and the sheet is foldable. A fence to prevent the growth of plankton in lake water. 3. A fence for preventing the growth of plankton in lake water, wherein a sheet is connected to the lower end of the float, an air chamber connected to an air pipe is provided below the float, and the sheet is formed so as to be bendable. An accommodation portion for air piping connected to the air chamber is formed at both end portions, and the accommodation portion for the air piping is provided with a connection opening portion and a connection edge portion on the outside. A fence to prevent the growth of plankton in lake water. 4. A fence for preventing plankton growth in lake water, in which a sheet is connected to a lower end of a float, an air chamber connected to an air pipe is provided below the float, and the sheet is formed so as to be bendable. An accommodation portion for air piping connected to the air chamber is formed at both end portions, and the connection opening of the air piping accommodation portion is connected to the connection opening of the adjacent air piping accommodation portion, and the connection thereof is made. A fence for preventing plankton from multiplying in lake water, characterized in that the edge of the lake is connected to an adjacent edge of the connecting piece via a connecting tool.