JP6313232B2 - Water pollution prevention fence - Google Patents

Description

  The present invention relates to a water pollution prevention fence, and more particularly to a water pollution prevention fence having a measurement function of a pollution prevention effect.

Water pollution prevention fences are floating type fences used to prevent the diffusion of pollutants in water areas such as harbors, coasts, rivers, etc. ing.
Diffusion of pollutants is prevented by hanging a water-permeable sheet from the bottom of the columnar float and surrounding or shutting out the target water area with the float.

  Patent Document 1 discloses a water pollution prevention fence in which a main body composed of a float and a sheet is connected in series via a joint member.

A water pollution prevention fence may measure the pollution prevention effect periodically after in-service. The effect is measured by comparing the concentration of pollutants inside and outside the sheet.
In the past, the sheet was pulled up onto the water, a part of the sheet was cut out, the polluted substances adhering to the front and back of the sheet were collected, and the anti-fouling effect was measured by comparing the concentration of the pollutants with a measuring machine.

Japanese Patent Laid-Open No. 4-64614

However, the conventional techniques described above have the following drawbacks when measuring the pollution prevention effect.
<1> Since a part of the sheet is cut out, the sheet is lost, and the original pollution prevention function of the fence is impaired.
The <2> sheet is continuous over the entire length of the water pollution prevention fence. Therefore, a great deal of labor is required to pull it up from the water, and work efficiency is poor.
<3> Since it is difficult to distinguish the front and back of the cut sheet piece, the measurement is easy to make an error.
<4> Generally, as a water quality inspection method, a method of inspecting water collected using a water sampling container (mouth wide bottle) with a rope is widely known.
In this inspection method, it is very difficult to specify the depth of the collected water because the water in the container freely enters and exits not only when the water sampling container is settled but also when it is pulled up.
Therefore, it is impossible to accurately inspect the pollution situation at a specific water depth.

An object of the present invention is to provide a water pollution prevention fence having at least one of the following effects.
<1> It is possible to measure the pollution prevention effect without impairing the original pollution prevention function of the water pollution prevention fence.
<2> It is easy to collect a sample for measuring the pollution prevention effect and the work efficiency is good.
<3> The contrast of the sample for measuring the pollution control effect is clear and easy to measure.
<4> Able to accurately inspect the pollution status at a specific depth.

In order to solve the above-mentioned problems, the water pollution prevention fence of the present invention is a water pollution prevention fence used for sampling harmful substances in water areas where harmful substances such as cesium and pollutants harmful to the environment float. The fence portion having a float and a fence sheet suspended from the float is used by being hung around and suspended from the top of the float, and can be externally opposed to both sides of the fence sheet. A measuring sheet, wherein the measuring sheet has the same permeation performance as the inner sheet and the outer sheet positioned on both sides of the fence sheet , and a weight is attached to the lower side of the measuring sheet. To do.

  The water pollution prevention fence of the present invention is characterized in that the measurement sheet is composed of an inner sheet, an outer sheet, and a connecting portion that connects the inner sheet and the outer sheet.

  The water pollution prevention fence of the present invention is characterized in that a pull-up rope is connected to a part of the measurement sheet, and the measurement sheet can be pulled up via the pull-up rope.

  In the water pollution prevention fence of the present invention, the fence sheet is a water-permeable sheet.

Since the water pollution prevention fence of this invention has the structure demonstrated above, it is provided with at least one of the following effects.
<1> Since a sample is collected from a measurement sheet separate from the fence part and the fence sheet itself is not damaged, the pollution prevention function is not impaired even after the sample is collected.
<2> The measurement sheet is partially disposed on the fence portion, and a pull-up rope is connected to the lower ends of the inner sheet and the outer sheet, so that the pull-up work is easy and the work efficiency is good.
<3> Since the inner sheet and the outer sheet are compared rather than the front and back of one sheet piece, the comparison object is clear and the measurement is easy.
<4> Since the measurement sheet can be arranged along the water depth direction, sampling according to the water depth is possible, and the contamination state at a specific water depth can be accurately inspected.

Explanatory drawing of the water pollution prevention fence which concerns on this invention. Explanatory drawing of the water pollution prevention fence which concerns on this invention. Explanatory drawing of Example 2 of this invention.

  Hereinafter, the water pollution prevention fence of this invention is demonstrated in detail, referring drawings.

[Configuration of the present invention]
<1> Overall configuration (FIGS. 1 and 2).
The water pollution prevention fence 1 of the present invention includes a fence portion 10 and a measurement sheet 20.
By connecting the plurality of fence portions 10 in the longitudinal direction of the float 11, the water area can be enclosed and the movement of the pollutant can be restricted. The measurement sheet 20 is partially installed on the fence unit 10.
In this example, although the fence part 10 and the measurement sheet | seat 20 are set as another member which can be isolate | separated, both can also be connected by the upper part of the float 11. FIG. Or it can also be set as an integral structure.

<2> Fence part.
The fence part 10 is a part which prevents diffusion by preventing the permeation of pollutants.
The fence unit 10 is a curtain type fence, and includes, for example, a known silt fence or an oil fence.
The fence unit 10 includes at least a columnar float 11 and a fence sheet 12 that is suspended from under the float 11 in water.

<2.1> Float.
The float 11 is a member that gives buoyancy to the water pollution prevention fence 1.
In this example, the float 11 is coated with a cylindrical polystyrene foam with PVC tarpaulin. In addition, each well-known technique is employable.

<2.2> Fence sheet.
The fence sheet 12 is a member that restricts movement of pollutants in water.
In this example, a rectangular canvas made of polyester is used for the fence sheet 12. In order to ensure water permeability, a gap is provided between the fibers of the canvas, but depending on the application, it may be non-permeable. In addition, each well-known technique is employable.
The fence sheet 12 is connected to the lower part of the float 11 along the longitudinal direction, and is suspended in water.
A weight 13 can be connected along the lower side of the fence sheet 12 to prevent the fence sheet 12 from being bent or stagnation.
In this example, a steel chain that has been galvanized is used as the weight 13. In addition, each well-known technique is employable.

<3> A measurement sheet.
The measurement sheet 20 is a part for measuring the pollution prevention effect of the fence part 10.
The measurement sheet 20 has at least an inner sheet 21 and an outer sheet 22 that can be externally opposed to both side surfaces of the fence sheet 12 and a connecting portion 23 that connects the two sheets.
The measurement sheet 20 is used by wrapping the connecting portion 23 around the upper portion of the float 11 and suspending the inner sheet 21 and the outer sheet 22 in water on both sides of the float 11.

<3.1> Inner sheet, outer sheet.
The inner sheet 21 and the outer sheet 22 are sheets having a function of measuring the concentration of pollutants in water. For convenience, the inner sheet 21 of the water area enclosed by the pollutant prevention fence 1 will be described as the inner sheet 21, and the outer sheet will be described as the outer sheet 22, but the functions are the same.
In this example, the inner sheet 21 and the outer sheet 22 are made of a polyester permeable canvas similar to the fence sheet 12. In order to make the sampling conditions the same, the inner sheet 21 and the outer sheet 22 have the same transmission performance.
A weight 26 can be connected to the lower sides of the inner sheet 21 and the outer sheet 22 to prevent stagnation and stagnation.
In this example, a steel chain that has been galvanized is used as the weight 26. In addition, each well-known technique is employable.

<3.2> Connecting part.
The connecting portion 23 is a portion that connects the inner sheet 21 and the outer sheet 22.
In this example, the connecting portion 23 is a separate member from the inner sheet 21 and the outer sheet 22, but the central portion of one continuous sheet may be the connecting portion 23.
The connecting portion 23 covers the float 11 to connect the fence portion 10 and the measurement sheet 20. No special fixture is required for connection.

<3.3> Lifting rope.
The pulling rope 25 is a rope for lifting the inner sheet 21 and the outer sheet 22 from the water.
As the pulling rope 25, a wire rope, a chain, or the like can be adopted in addition to the fiber rope.
One end of the pulling rope 25 is connected to the lower ends of the inner sheet 21 and the outer sheet 22, and the other end is connected to the buoy 24. The length of the pulling rope 25 is about the length from the water surface to the lower ends of the inner sheet 21 and the outer sheet 22.
If the pull-up rope 25 is lifted by using the buoy 24 floating on the water as a mark, the inner sheet 21 and the outer sheet 22 can be easily pulled up from the ship.

[Measurement method of water pollution prevention effect]
Next, a method for measuring the water pollution prevention effect by the water pollution prevention fence of the present invention will be described with reference to the drawings.

<1.1> Installation location.
The water pollution prevention fence 1 of this invention can be used in water areas, such as the ocean, a pond, and a lake.

<1.2> Examples of pollutants.
Examples of the pollutant that is the target of the water pollution prevention fence 1 of the present application include soil particles, cesium, dioxin and the like to which harmful substances are attached.

<1.3> Capturing function of pollutants.
In this example, a sample for measuring the content of the pollutant in the water area is obtained by adhering the pollutant to the gap between the fibers of the canvas of the inner sheet 21 and the outer sheet 22. However, the sampling method is not limited to this, and other known techniques can be adopted.

<2.1> Pull up the seat.
The pulling rope 25 connected to the buoy 24 on the inside of the pollutant prevention fence 1 is drawn around on the ship or from the land at the end of the water pollution prevention fence 1 with the buoy 24 as a mark.
Since the pulling rope 25 is connected to the lower end of the inner sheet 21, the lower end of the inner sheet 21 can be lifted to the water by pulling the pulling rope 25 on the water.
The conventional water pollution prevention fence does not have the lifting means like the lifting rope 25 of the present invention, and because the entire sheet is lifted, the weight is heavy and the lifting work efficiency is poor.
On the other hand, since the water pollution prevention fence 1 of the present invention pulls up only the inner sheet 21 partially arranged on the fence portion 10, the lifting weight is light and the pulling rope 24 only needs to be pulled. Is very good.

<2.2> Sample collection.
A part of the inner sheet 21 pulled up on the water is excised, and collected as a sample for measuring the amount of adhering contaminants. A part of the outer sheet 22 outside the fence sheet 12 is similarly collected.
In order to measure the water pollution prevention effect, conventional water pollution prevention fences have been partially cut off and collected. For this reason, the sheet is lost, and the water pollution prevention function is impaired.
On the other hand, the water pollution prevention fence 1 of this invention has separately the fence part 10 which prevents the spreading | diffusion of a pollutant, and the measurement sheet | seat 20 for measuring the pollution prevention effect of the fence part 10, and the measurement sheet | seat 20 only. A sample is taken from the fence and the fence part 10 is not damaged. For this reason, even if the pollution prevention effect is measured, the pollution prevention function is not impaired.

<2.3> Measurement of pollutants.
The inner sheet 21 and the outer sheet 22 on both sides of the fence part 10 are subdivided together with the adhering pollutants and applied to a measuring machine. The pollution prevention effect of the water pollution prevention fence 1 can be measured by comparing the density | concentration of the pollutant of both sheets.
The conventional water pollution prevention fence has to cut a part of one sheet and collect the pollutant from both sides, and it is difficult to collect the pollutant. Moreover, it was easy to mix the samples because the front and back of one sheet piece were compared.
On the other hand, the water pollution prevention fence 1 of the present invention uses the two sheets of the inner sheet 21 and the outer sheet 22 as they are, so that it is easy to collect the pollutant. Also, it is difficult to mix up the samples.
Furthermore, the contamination state according to the water depth is directly reflected in the measurement sheet 20 arranged along the water depth direction together with the fence sheet 12.
Therefore, sampling according to the water depth is possible, and the contamination state at a specific water depth can be accurately inspected.

[Example of connecting the inner and outer sheets with a lifting rope]
Next, another embodiment in which the inner sheet 21 and the outer sheet 22 are connected by the pulling rope 25 will be described (FIG. 3).
In this example, one end of the pulling rope 25 is connected to the lower end of the inner sheet 21, the other end is stretched over the float 11, and is connected to the lower end of the outer sheet 22 on the opposite side.
In this example, the buoy 24 is not required and the pulling rope 25 can be easily handled. Further, the inner sheet 21 and the outer sheet 22 on both sides of the fence sheet 12 can be lifted only by operating one pulling rope 25, and the working efficiency is good.

DESCRIPTION OF SYMBOLS 1 Water pollution prevention fence 10 Fence part 11 Float 12 Fence sheet 13 Weight 20 Measurement sheet 21 Inner sheet 22 Outer sheet 23 Connection part 24 Buoy 25 Lifting rope 26 Weight

Claims (4)

A water pollution prevention fence that is used for sampling harmful substances in water areas where harmful substances such as cesium and pollutants harmful to the environment float.
A fence part having a float and a fence sheet suspended from the float;
Wrapped around the upper part of the float and used, comprising a measurement sheet that can be externally opposed to both sides of the fence sheet,
The measurement sheet has the same permeation performance of the inner sheet and the outer sheet positioned on both sides of the fence sheet,
A weight is attached to the lower side of the measurement sheet,
Water pollution prevention fence.   2. The water pollution prevention fence according to claim 1, wherein the measurement sheet includes an inner sheet, an outer sheet, and a connecting portion that connects the inner sheet and the outer sheet.   The water pollution prevention fence according to claim 1 or 2, wherein a pull-up rope is connected to a part of the measurement sheet, and the measurement sheet can be pulled up via the pull-up rope.   The water pollution prevention fence according to any one of claims 1 to 3, wherein the fence sheet is a water-permeable sheet.

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