JP2648065B2 - Contamination liquid diffusion prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contaminant diffusion prevention device, and more particularly, to a one-line floating / sedimentation type contaminant diffusion prevention device having an air float having an air supply / exhaust portion.

[0002]

2. Description of the Related Art In general, a one-line contaminant prevention device includes:
During construction of dredging and rubble, etc., to prevent the problem of silt and soil floating in the water and spreading along the flow and contaminating the oceans and lakes, etc. A long float that floats in the water and a curtain that is suspended below the float to prevent the diffusion of contaminated liquid. It has.

[0003] By the way, such a contaminant diffusion prevention device is
If the weather is disturbed due to a typhoon approaching during the installation of the pollutant dispersion prevention device, it will be installed in the water for a long time until the construction is completed. Need to be protected from In addition, it is necessary to prevent the pollutant diffusion preventing device from hindering the passage of the ship when the ship is passing.

Therefore, conventionally, a so-called floating / sinking type contaminant diffusion preventing device shown in FIG. 3 has been widely adopted. In that structure, a floating bag-shaped air float 10 is used as the float.
The air supply / exhaust portion 102 is provided at one end of a portion where the curtain 101 is suspended. During normal use, air is introduced from the air supply / exhaust portion 102 to float the air float 100 on the water surface,
In a stormy weather such as a typhoon, or when a ship is passing, air is extracted from the air supply / exhaust unit 102, and the air float 100 and the curtain 101 are lowered to the bottom of the water.

[0005]

SUMMARY OF THE INVENTION
Is a connection portion of the air hose 103 connected to an air compressor (not shown).
In the case of causing the air float 100 to sink, first, the end of the air float 100 opposite to the supply / exhaust portion 102 is caused to sink first.
It is necessary that the sinking operation be continuously and gently transmitted to the end on the supply / exhaust section 102 side, and finally, the end on the supply / exhaust section 102 side be settled. On the other hand, when the sunk air float 100 is to float, the end of the air supply / exhaust section 102 first floats first, and the floating operation is continuously and gradually transmitted to the end opposite to the air supply / exhaust section 102 side. Finally, it is necessary to float the end opposite to the air supply / exhaust portion 102 side.

Therefore, in order to satisfy such a demand, the floating force per minute portion at the end of the air float 100 on the side of the air supply / exhaust portion + F (the gravitational force of the air float 100 minus the gravitational force of the air float 100). Is set larger than the other portions, and the sinking force per minute portion at the end opposite to the air supply / exhaust portion 102 -F (the gravitational force of the air float 100 minus the buoyancy of the air float 100) is set to Must be set larger than the part.

However, in the above-mentioned conventional configuration, the air supply / exhaust portion 102 of the air float 100 is provided at one end of a portion where the curtain 101 is suspended, so that the air float 100 can be lifted up from a state of sinking on the water bottom. There are the following problems. That is, since the bottom of the underwater in the water area in which this type of contaminant diffusion prevention device is provided is generally formed by soft soil such as silt or clay, the contaminant diffusion prevention device is provided thereon. When it sinks, not only the curtain 101 but also the heavy float 100 is completely buried in the soil. As a result, the levitation force + F at the end of the air supply / exhaust portion 102, which should be set highest, becomes lower than the levitation force + F of the other portions, and the air float 100
When air is introduced into the inside, there is a possibility that the air float 100 will rise from other parts and buckle. When such buckling occurs in the air float 100, the internal pressure of a specific portion of the air float 100 becomes abnormally high, which causes a problem that the air float 100 is damaged.

[0008] The buckling causes the air float 10.
After the internal pressure of the specific portion of the air float 100 becomes extremely high, when the air float 100 expands due to the internal pressure, the buoyancy of the air float 100 is rapidly increased by the pressurized air being rapidly introduced into the entire air float 100. To rise. As a result, since the entire apparatus attempts to float at once, a large tensile force acts on the air float 100 itself and the curtain 101, and there is a problem that the apparatus may be damaged.

In a construction site where organisms such as shellfish tend to adhere, it is difficult to control the weight of the air float 100 or the curtain 101 due to the weight of the organisms attached, and the above-mentioned various inconveniences may occur. . The present invention has been made in view of the above problems, and has as its object to provide a contaminant diffusion preventing device capable of performing floating and sinking operations safely and reliably regardless of the situation at a construction site.

[0010]

In order to solve the above-mentioned problems, a pollution liquid diffusion preventing device according to the present invention has a curtain for preventing the diffusion of a pollutant liquid below an air float having an air supply / exhaust portion. In the installed contaminant diffusion prevention device, the air float is extended a predetermined length from the curtain hanging portion where the curtain is hanging, and the curtain hanging portion,
A non-curtain hanging portion in which the above-mentioned air supply / exhaust portion is provided at an end portion,
It is arranged between the non-curtain hanging part and the curtain hanging part,
And a reinforcing member for preventing buckling from occurring at a boundary between the two .

[0011]

According to the contaminated liquid diffusion prevention device of the above construction, since the non-curtain hanging portion having a light weight is provided on the air supply / exhaust portion side, first, the curtain hanging portion side end of the air float first sinks. As a result, the sinking operation is continuously and gently transmitted to the air supply / exhaust portion side of the non-curtain hanging portion, and the air supply / exhaust portion can be finally settled.

On the other hand, by introducing air into the air float through the air supply / exhaust portion from the state of sinking on the water floor, the light weight non-curtain hanging portion first rises from the air supply / exhaust portion side, and the floating The operation is continuously and gently transmitted to the curtain hanging portion, and finally the curtain hanging portion can be lifted. By providing the reinforcing member for preventing buckling, it is possible to prevent buckling from occurring at a boundary portion between the non-curtain hanging portion and the curtain hanging portion in the air supply process.

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 is a schematic side view of a pollution liquid diffusion preventing device A according to an embodiment of the present invention. With reference to FIG. 2, this contaminant diffusion prevention device A is a floating / sedimentation type, and is installed vertically in the water, and is provided with a curtain 1 for preventing the diffusion of contaminants which divides a working water area. It is provided with an air float 2 that is fixed and prevents the curtain 1 from sinking to the bottom of the water, and an anchor block 3 that extends the curtain 1.

The curtain 1 has a plurality of rectangular campuses 11 made of polyester plain weave, which are arranged side by side. Reinforcing belts 13 extending to the left and right are attached to each campus 11, and fixing brackets (not shown) are provided at both left and right ends thereof. The campuses 11 are integrally connected by the fixture. At the lower end of each campus 11, a weight chain 15 for pulling the campus 11 in the vertical direction by its own weight is provided.

The air float 2 is a rubber floating bag material formed in a long shape, and upper and lower fin portions 21 and 22 extending along the longitudinal direction are integrally formed. The curtain 1 is suspended from the lower fin portion 22 via a connecting member 23. A supply / exhaust unit 2 for supplying pressurized air to the inside of the air float 2 is provided at one end.
The air supply / exhaust portion 24 is provided with an air hose 25 for connecting it to an air compressor (not shown).
Is connected. And like the conventional thing, the buoyancy of the air float 2 and the weight of the curtain 1
It is set in a well-balanced manner so that the anchor block 3 described below expands sufficiently during use.

The anchor blocks 3 are concrete blocks, and a plurality of anchor blocks 3 are submerged on the water floor according to the construction conditions of the curtain 1. On the upper surface of the anchor block 3, a connection fitting 31 is fixedly provided.
Is connected to one end of an anchor rope 32.
The other end of the anchor rope 32 is
Is connected to the lower fin 22 of the air float 2 through the anchor block 3 so that the curtain 2 is extended.

Next, the air float 2 will be described in detail with reference to FIG. 1 which is a perspective view of a main part of the contaminated liquid diffusion prevention device A. The air float 2 has the curtain 1 suspended therefrom. There is provided a curtain hanging portion 2a and a non-curtain hanging portion 2b extending from the curtain hanging portion 2a by a predetermined length and having the air supply / exhaust portion 24 at an end. Here, the length of the non-curtain hanging portion 2b is such that the floating force per minute portion + F is larger than that of other portions, and the sinking force per minute portion of the curtain hanging portion 2a -F
Is set to be larger than other portions, and is set to 5 m in this embodiment. However, the length is not fixed, and the weight of the curtain 1 to be constructed,
It is determined in consideration of various conditions such as the diameter of the air float 2.

Next, a plate-like reinforcing member 26 having a predetermined rigidity is provided on both sides of the lower fin 22 of the air float 2.
It is arranged between the non-curtain hanging portion 2b and the curtain hanging portion 2a. The reinforcing member 26 is made of fiber reinforced plastic, metal such as aluminum, wood, or the like, and is light in weight and buckling occurs between the curtain hanging portion 2a and the non-curtain hanging portion 2b. Those having sufficient strength to prevent the occurrence of the blemishes are employed. The reinforcing member 26 is formed in a shape in which both ends are thinned so that the rubber float 2 is not damaged by friction with the air float 2 during use.

Contamination liquid diffusion prevention device A having the above configuration
According to this, in the normal use state shown in FIG. 2, it is possible to prevent the contaminated liquid from diffusing into the clean water area as in the case of the conventional apparatus, and to reliably contain the sediment in a certain water area and settle it. Next, at the time of a typhoon or the like, or at the time of passage of a ship, etc., the air in the air float 2 is evacuated from the air supply / exhaust portion 24 so that the polluted liquid diffusion prevention device A can sink to the bottom of the water. . Here, in the present embodiment, since the non-curtain hanging portion 2b having a light weight is provided on the side of the air supply / exhaust portion 24, first, the end of the air float 2 on the side of the curtain hanging portion 2a first sinks down. The settlement operation is continuously and gently transmitted to the non-curtain hanging portion 2b on the side of the supply / exhaust portion 24, and finally the supply / exhaust portion 24 can be settled.

On the other hand, by introducing air into the air float 2 through the air supply / exhaust portion 24 from the state of sinking on the water bottom, the light non-curtain hanging portion 2b first rises from the air supply / exhaust portion 24 side. Then, the floating operation is continuously and gently transmitted to the curtain hanging portion 2a side, and finally the curtain hanging portion 2a can be floated. By providing the reinforcing member 26 for preventing buckling, buckling between the non-curtain hanging portion 2b and the curtain hanging portion 2a can be prevented in the air supply process.

As described above, according to the polluted liquid diffusion preventing device A of the present embodiment, the intended floating operation is ensured without the air float 2 buckling due to the action of the non-curtain hanging portion 2b and the reinforcing member 26. , It is possible to return to a desired floating state. Therefore, according to the present embodiment, there is no possibility that a stress that adversely affects the air float 2 or the curtain is applied, and a remarkable effect that the reduction of the durability of the device A can be prevented can be achieved.

Further, by providing the non-curtain hanging portion 2b, the floating force on the air supply / exhaust portion 24 side can be reliably set to the highest level. As a result, the above-mentioned effect can be obtained even at a construction site where organisms such as shellfish easily adhere. Can be played.
Therefore, according to the present embodiment, it is possible to provide the polluted liquid diffusion prevention device A that can perform the floating and sinking operation safely and reliably regardless of the situation at the construction site.

The above-described embodiment is merely an example of a preferred embodiment of the present invention, and it goes without saying that various design changes can be made without changing the gist of the present invention.

[0024]

As described above, according to the contaminated liquid diffusion prevention device of the present invention, the action between the non-curtain hanging portion and the curtain hanging portion by the action of the non -curtain hanging portion and the reinforcing member .
It is possible to return to a desired floating state by reliably performing the intended floating and sinking operation without buckling of the boundary portion .
Therefore, according to the present invention, there is no longer a possibility that a stress that adversely affects the air float or the curtain is applied, and a remarkable effect that a decrease in the durability of the device can be prevented can be achieved.

Further, by providing the non-curtain vertical portion, the floating force on the air supply / exhaust portion side can be reliably set to the highest level. As a result, the above-described effect can be obtained even at a construction site where organisms such as shellfish easily adhere. Can be played.
Therefore, according to the present invention, it is possible to provide a polluted liquid diffusion prevention device that can perform floating and sinking operations safely and reliably regardless of the situation at the construction site.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a pollution liquid diffusion preventing device according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the contaminated liquid diffusion prevention device.

FIG. 3 is a schematic diagram of a main part of a conventional contaminant diffusion prevention device.

[Explanation of symbols]

 A Contamination liquid diffusion prevention device 1 Curtain portion 2 Air float 2a Curtain hanging portion 2b Non-curtain hanging portion 24 Supply / exhaust portion 26 Reinforcing member

Claims (1)

(57) [Claims] 1. A contaminant diffusion prevention device in which a curtain for preventing diffusion of a contaminant liquid is provided below an air float having an air supply / exhaust portion, wherein the air float comprises a curtain drape on which the curtain is provided. A non-curtain vertically extending portion extending from the curtain vertically extending portion by a predetermined length and having the above-mentioned air supply / exhaust portion at an end portion, and a non-curtain vertically extending portion and the curtain vertically extending portion. Arranged,
A contaminant diffusion prevention device, comprising: a reinforcing member for preventing buckling from occurring at a boundary between the two .