JP2001159127A - Suspended-matter recovery fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspended-matter recovery fence, by which the diffusion of suspended matter is prevented effectively, obviating deterioration of containability during nonuse and spreading workability in an emergency case and the suspended matter can be recovered easily by imparting proper buoyancy corresponding to the functions of the convergent section of the suspended matter and a guide section. SOLUTION: In the suspended-matter recovery fence 1, the fence used for preventing the diffusion of suspended matter in the vicinity of the surface of water and recovering the suspended matter is composed of a buoyancy material, comprising a bag body or the like bought to an expanded state by supplying the inside of an air chamber with air and a skirt 3 elongated under the surface of water, and buoyancy in the convergent section 4 of the suspended matter is made higher than that in the guiding section 5 of the suspended matter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fence used to prevent the spread of suspended matters such as oil and garbage spilled on the sea or a river and to recover the suspended matters, and in particular, to ships and the like. The present invention relates to a suspended matter collection fence capable of improving the suspended matter collection performance while maintaining the fence storage ability.

[0002]

2. Description of the Related Art Suspended matter collection fences are installed on the side of a ship's hull to prevent the spread of contaminants such as oil and debris on the sea and rivers when they leak, and to collect them appropriately. It is used by being spread over seas and rivers. In other words, this fence consists of a buoyant material and a skirt that extends below the water surface, and at the top of the buoyant material that protrudes above the water surface, prevents the diffusion of suspended matter on the water surface,
The skirt held by the buoyancy material prevents the suspended matter below the water surface from diffusing.

[0003] Generally, the suspended matter recovery fence is made of U
Since the buoyant material or the skirt collides with the skirt, the floating material is guided to the deepest portion of the U-shaped or J-shaped and converges. Therefore, if the suspended matter collected in the convergence part is collected by a ship or the like, contamination of the surrounding water area is prevented.

[0004]

However, since the conventional suspended matter collecting fence has a uniform buoyant material and a skirt shape at any part, it is the same regardless of the functions of the converging part and the guiding part. It had a buoyancy of.

However, the buoyancy required for the converging portion and the guiding portion are not the same. In other words, the guiding part only has to have the buoyancy sufficient to hold the skirt, since the floating part simply has to guide the floating matter to the converging part along the fence, but the converging part means that the floating matter gathers, The pulling force is generated because the fluid force due to the towing of the fence and the water flow acts. Therefore, in the conventional fence having uniform buoyancy, the converging portion of the suspended matter tends to sink. If the marine conditions are severe, the overtopping at the converging portion or the fence itself sinks below the water surface, and the suspended matter is diffused.

In order to solve such a situation, it is necessary to prepare a fence having buoyancy in accordance with the convergence portion in advance. Becomes large. In addition, of course, the economy is difficult, and the expansion workability is deteriorated due to the increase in volume and weight, so that it is impossible to respond immediately in an emergency.

Therefore, the present invention improves such a conventional suspended matter collection fence and provides appropriate buoyancy according to the functions of the converging portion and the guiding portion of the suspended matter, thereby improving the storability when not in use. It is an object of the present invention to provide a suspended matter collection fence capable of effectively preventing the spread of suspended matter and facilitating its collection while preventing the spreadability in an emergency from deteriorating. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of the present invention is to provide a fence for preventing the spread of suspended matter near the water surface and collecting the suspended matter. The buoyancy material and the skirt extended below the water surface make the buoyancy at the converging part of the suspended matter larger than the buoyancy at the guiding part of the suspended matter, so that even in severe sea conditions, The present invention relates to a suspended matter recovery fence that does not overtop the sea or sink itself below the surface of the water.

Preferably, the cross-sectional area of the buoyant material at the converging portion of the floating material is made larger than the cross-sectional area of the buoyant material at the guiding portion of the floating material to secure a marginal buoyancy. The present invention relates to a floating material recovery fence formed of a bag having a circular shape and a buoyant material that is inflated by supplying air into an air chamber. In addition,
The cross-sectional area of the buoyancy material can be increased smoothly from the guide portion of the suspended matter toward the converging portion, or can be increased by providing a step.

Preferably, the skirt is provided with a tensile force holding member. Further, the converging portion and the guiding portion of the suspended matter may be integrated or separate, and in the case where they are separated, the converging portion of the suspended matter and the guiding portion are joined to form the entire body. The suspended matter recovery fence of the invention is constituted.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a suspended matter recovery fence is used for preventing suspended matter such as oil and garbage flowing out to the sea or a river from spreading and recovering suspended matter. In particular, in the case of an oil spill accident, it is common practice to quickly deploy an oil fence to prevent the spread of the oil spill to surrounding waters, collect the oil spill in one place, and collect it with an oil skimmer or the like. .

In this case, the boom is U-shaped or J-shaped.
The spilled oil is guided to the deepest portion of the U-shaped or J-shaped while being towed by the ship, and the spilled oil is converged. Here, a retracting force is generated because the fluid force due to the towing of the fence or the water flow directly acts on the converging portion, but in the present invention, the buoyancy in the converging portion is larger than the buoyancy in the guiding portion, so that the fence sinks. The spilled oil is prevented from leaking and the spilled oil at the convergence portion can be collected without leakage.

That is, like a conventional oil fence, spilled oil floating on the surface of the water overtops the fence and diffuses, or spilled oil floating below the water diffuses outside the fence through the lower part of the skirt. That is to say, contamination can be reliably prevented.

In other words, it is not necessary to increase the buoyancy of the guide portion of the floating material more than necessary in accordance with the converging portion.
As a whole, the fence can be made compact and have a small storage volume as compared with the conventional fence, while ensuring sufficient suspended matter collection performance.

In order to increase the buoyancy of the suspended matter in the converging portion, it is sufficient to increase the buoyancy material.
The cross-sectional area of the buoyant material at the converging portion is made larger than the cross-sectional area of the buoyant material at the guiding portion. For example, if the buoyancy material has a circular cross section, the outer diameter may be increased.

Here, as the buoyancy material, it is possible to use styrofoam of closed cells having buoyancy required for each of the converging portion and the guiding portion, and a material in which air is sealed in a bag body. That is, a weather resistant, oil-resistant polyester reinforced PVC cloth, inside a predetermined size, a predetermined number of buoyancy material consisting of closed-cell styrofoam attached, water-resistant polyester made A buoyancy material and a skirt are constructed by reinforcing with a tension belt, and an air chamber is also constructed with a polyester reinforced PVC cloth, and reinforced with a polyester tension belt and supplied into the air chamber with a blower. And a skirt, and further, a non-adhesive layer is provided inside a polyester-reinforced plate-like rubber to form an air chamber, an expanded air chamber is a buoyant material, and an adhesive at the lower end of the plate-like rubber is a skirt. Can be used.

The buoyancy is increased by gradually or stepwise increasing the outer diameter of the expanded polystyrene or air chamber serving as a buoyancy material from the guide portion of the suspended matter toward the converging portion. The suspended matter collection fence has flexibility so that it can be wound up or folded.

The floating substance recovery fence is subjected to a fluid force due to towing by a ship, a water flow, or the like. It is preferable to provide a tension holding member on the skirt to bear the fluid force. This is because the buoyancy material is made to bear only the weight of the skirt to prevent the buoyancy material from being destroyed by the fluid force.

Further, the convergence portion and the guide portion of the suspended matter may be integrated by continuously providing a buoyancy material and a skirt.
The floating material recovery fence may be configured as a whole by separately preparing a buoyancy material and a skirt for the converging portion and that for the guide portion and joining the ends. When the convergence section and the guiding section are integrated, the extension of the fence is limited because the position of the convergence section is determined in advance. ,
Furthermore, the fences for the converging portion and the guiding portion can be combined according to the expanded shape such as the I-shape.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a suspended matter recovery fence 1 of the present invention.
1 is a perspective view showing a first embodiment of the present invention. Here, as shown in FIG. 1 (A), the suspended matter recovery fence 1 has a non-adhesive layer 1B provided inside a plate-like rubber reinforced with polyester fibers 1A to form an air chamber. As shown in (B),
By supplying air into the air chamber, it expands to become a buoyant material 2,
At the same time, the non-expanded adhesive portion at the lower end of the plate-like rubber becomes the skirt 3.

By reducing the width of the non-adhesive layer 1B at the converging portion 4 of the suspended matter and decreasing it at the guiding portion 5, the outer diameter of the air chamber after air supply is changed, and the buoyancy of the converging portion 4 is increased. That is, the outer diameter φ4 of the buoyancy material 2 in the converging portion 4
And the outer diameter φ5 of the guiding portion 5 is φ4> φ5
Therefore, the buoyancy at the converging section 4 is larger than the buoyancy at the guiding section 5.

In the first embodiment shown in FIG. 1, by extending the non-adhesive layer 1B of the converging portion 4 below the guiding portion 5, the central axis of the outside diameter of the air chamber of the converging portion 4 is adjusted to the guiding portion 5.
Although it is located on the lower side, it is also possible to extend the non-adhesive layer of the convergence portion up and down to change the outer diameter of the air chamber while aligning the central axis. The layers may extend upward.

FIG. 2 is a perspective view and a sectional view showing the floating state of the suspended matter recovery fence of the first embodiment. FIG. 2 (A)
As shown in the figure, the suspended matter recovery fence 1 is formed in a substantially U-shape by connecting the extension ropes 6A and 6B connected to the lower end of the skirt 3 to an extension bar protruding from the towing ship (not shown) toward the sea. The deepest part is the converging part 4 and the both ends are the guiding parts 5A and 5B.

Therefore, the suspended matter in the U-shaped opening is
It is collected in the convergence part 4 while colliding with the guiding parts 5A and 5B,
They are recovered by towing vessels. FIG. 2 (A)
In the above, the end of the guiding portion 5A protrudes from the sea due to the side height of the towing ship. Also, the waterline of the suspended matter recovery fence 1 is not shown.

Here, as shown in FIG. 2B, the convergence portion 4 is subjected to a fluid force F due to towing, water flow, etc., but the suspended matter recovery fence is held by an extension rope connected to the lower end of the skirt 3. Therefore, the lower end of the skirt 3 serves as a tension member (tensile force holding member). In such a bottom tension method, the skirt 3 is effectively prevented from being turned up in the convergence section 4, and the convergence performance of suspended matter is improved.

On the other hand, in the bottom tension type, the fluid force F
In particular, the force T for pulling the skirt 3 into the water at the converging portion 4 increases. Therefore, the convergence of the convergence portion 4 requires the buoyancy of the convergence portion 4. The buoyancy of the convergence portion 4 is increased in the present invention.

After the suspended matter is collected, the fence 1 is stored in the towing vessel. However, as shown in FIG. 2A, the outside diameter of the air chamber is large only in the converging portion 4 and is large in the guiding portions 5A and 5B at both ends. Because it is small, it can be stored compactly.

FIG. 3 is a perspective view showing another example of extension of the suspended matter recovery fence 1, and FIG.
(B) shows an example of an I-shaped extension. Here, FIG.
In the J-shaped extension shown in (A), one end including the deepest portion of the J-shape becomes the converging portion 4 (air chamber outer diameter φ4), and the other end becomes the guiding portion 5 (air chamber outer diameter φ5). FIG. 3 (B)
In the I-shaped expansion shown in FIG. 1, the water is extended at an angle θ with respect to the water flow, but one end on the downstream side is converged 4 (air chamber outer diameter φ).
4), and one end on the upstream side is a guiding part 5 (air chamber outer diameter φ5).
Becomes In the case of the I-shaped extension, the tip of the converging portion 4 is fixed to a quay (not shown) or the like.

FIG. 4 shows a second embodiment of the suspended matter collecting fence 1 of the present invention, and FIG.
(B) is a perspective view showing a U-shaped extended state. Here, the suspended matter collection fence 1 is a polyester reinforced PVC cloth, in which a predetermined number of buoyancy members made of closed-cell styrofoam 1C having a predetermined size are attached,
The buoyancy material and the skirt 3 are reinforced with a water-resistant polyester tension belt.

Then, the outer diameter of the expanded polystyrene 1C is increased (φ4) at the converging portion 4 of the suspended matter, and reduced (φ5) at the guiding portion 5, and both are joined by a fastener 7A and a tension belt 7B which are connecting tools. . FIG. 4B
, The illustration of the fastener 7A is omitted.

As described above, since the relationship between the outer diameter φ4 of the expanded polystyrene 1C at the converging portion 4 and the outer diameter φ5 at the guiding portions 5A and 5B is φ4> φ5, the buoyancy at the converging portion 4 is reduced by the guiding portion 5A. , 5B.

In the second embodiment shown in FIG. 4, the width of the skirt 3 in the convergence section 4 is shortened so that the vertical width of the suspended matter recovery fence 1 matches the guide sections 5A and 5B. The skirt width of the guide portion and the skirt width may be the same, and the lower end of the skirt of the converging portion may be located below the guiding portion, or the upper end of the converging portion may be located above the guiding portion.

[0033]

As described above, the present invention is a floating material recovery fence in which the buoyancy of the floating material at the converging portion is larger than the buoyancy of the floating material guiding portion. Also, the fence itself does not sink below the water surface, and the performance of collecting suspended matters can be improved. In addition, it is possible to make the fence excellent in the storability of the fence in a ship or the like.

That is, by providing appropriate buoyancy according to the functions of the converging portion and the guiding portion of the suspended matter, the storage property when not in use and the spreadability in the emergency can be prevented from being deteriorated, and the suspended matter can be prevented from being deteriorated. Diffusion can be effectively prevented and its recovery can be facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a suspended solids collection fence of the present invention.

FIG. 2 is a perspective view and a cross-sectional view illustrating an extended state of the suspended solids collection fence of the first embodiment.

FIG. 3 is a perspective view showing another example of extension of a suspended matter recovery fence.

FIG. 4 is a front view showing a second embodiment of the suspended matter collecting fence of the present invention, and a perspective view showing an extended state.

[Explanation of symbols]

 1 ‥ Floating matter collection fence 1A ‥ Polyester fiber 1B ‥ Non-adhesive layer 1C ‥ Styrofoam 2 ‥ Buoyant material 3 ‥ Skirt 4 ‥ Convergent part φ4 ‥ Outer diameter of buoyant material of convergent part 5,5A, 5B , Φ5B {Outer diameter of buoyancy material of guide part 6A, 6B} Spread rope 7A, 7B

Claims (6)

[Claims] 1. A fence for preventing and recovering suspended matter near a water surface, comprising a buoyant material and a skirt extending below the water surface, the buoyancy at a converging portion of the suspended matter being reduced by the floating matter. A suspended matter recovery fence characterized by having a buoyancy greater than a buoyancy at a guiding part of the fence. 2. The floating substance recovery fence according to claim 1, wherein a cross-sectional area of the buoyancy material at a converging portion of the floating substance is larger than a cross-sectional area of the buoyancy material at a guiding section of the floating substance. 3. The suspended matter collecting fence according to claim 1, wherein the buoyant member has a circular cross section. 4. The floating substance recovery fence according to claim 3, wherein the buoyancy member is formed of a bag that is inflated by supplying air into the air chamber. 5. The suspended matter recovery fence according to claim 1, wherein a tension holding member is provided on the skirt. 6. The method according to claim 1, wherein the convergence portion and the guide portion of the suspended matter are respectively composed of separate fences, and are configured by joining the two. Float collection fence.