JP2000336638A - Effluence diffusion preventive fence and spreading method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve effluence recovery efficiency by spreading a flexible fence body having a bag body that can be filled with buoyancy material or gas, inclining downstream from upstream side in relation to the flow direction of an installation part. SOLUTION: A specified quantity of buoyancy material 2 formed of closed cell styrene foam is fitted to polyester reinforced vinyl chloride containing fabric to form a fence body 1. The body 1 is folded and stored on a bank of a riverbank, and an end part 1A on the folded lower side of the body 1 is fixed to an anchor installed in the ground. A wire 4 is connected to an end part 18 on the folded upper side of the body 1 through a shackle to fit an auxiliary buoyancy material 5 formed of styrene foam. The end of the wire 4 is connected to a drum 6 with hydraulic power installed on a bank of an opposed riverbank downstream of the anchor, so that a downstream spreading angle θ of the body 1 to a flow direction is 110 deg. to 135 deg.. The effluence recovery efficiency can thereby be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fence for preventing spills such as oil and garbage from spreading to rivers and the sea, and more particularly to extending the fence life and recovering spills. The present invention relates to an effluent diffusion prevention fence capable of improving the effluent.

[0002]

2. Description of the Related Art A spill diffusion prevention fence is provided to prevent the diffusion of pollutants downstream or in the surrounding sea area in the event that a pollutant such as oil or garbage flows out of a river, port, or other sea. It is used for the purpose of collecting contaminants within a predetermined range. And
The effluent diffusion prevention fence is usually stored on a river bank, a quay, or the like, and is expanded as necessary.

[0003] Here, the conventional effluent diffusion prevention fence is usually stretched at right angles to the flow, and the effluent is generated by a boat floating on a river or the like and sometimes a person directly entering the river. Recovered by naval tactics. In some cases, spills were collected along with the fence on the shore.

[0004] However, if it is stretched at right angles to the flow at the time of expansion, the tension applied to the fence main body increases, and if the flow is fast, the fence main body is easily damaged and the life is shortened. . In addition, a skirt is provided at the bottom of the fence body to prevent spills from diffusing past the fence, but if it is stretched at right angles to the flow, the skirt will be easily turned up, However, there was also a risk that it would not make sense. Furthermore, since the fence body is curved so that the central portion of the flow is the most downstream side, the effluent collects at the central portion, which makes the recovery operation difficult. On the other hand, if the spills are gathered together with the fence, the spills, particularly oil and chemicals, will spread over the fence during the gathering operation, which causes a problem that it is difficult to collect all the spills. .

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is to improve such a conventional effluent diffusion prevention fence, and to relieve the tension applied to the fence body at the time of expansion even when river flow or tidal current is fast. An object of the present invention is to provide an effluent diffusion preventing fence and a method of extending the effluent, which can prevent the skirt from turning over and improve the effluent collection efficiency and operability.

[0006]

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 flexible member having a buoyant material or a bag capable of containing gas. Is an effluent diffusion prevention fence obtained by extending the fence main body with an inclination from the upstream side to the downstream side with respect to the flow direction of the installation portion, and preferably, the fence main body is spread downstream with respect to the flow direction. Angle θ, 110 ° ≦ θ ≦
The fence body is fixed at 135 °, and the downstream end of the expanded fence body is fixed to the effluent accumulation pit installed on the shore. In addition, a fixing device for fixing one end of the fence body to the shore, an extension cable connected to the other end of the fence body and having a length equal to or longer than at least the length of the fence body, and a winding device for the extension cable installed on the opposite shore. Has,
The installation position of the winding rope winding device is located downstream of the fixing device of the fence body.

Further, one end of a flexible fence main body having a bag body capable of enclosing a buoyant material or gas is fixed to a shore, and an extension cord connected to the other end of the fence main body is provided.
It is installed in advance on the water floor from the shore on the fence fixed side to the opposite shore, and connected to the winding device installed on the downstream side of the opposite shore, and by operating the winding device, the upstream side with respect to the flow direction The present invention relates to a method for spreading an effluent diffusion prevention fence in which a fence body is spread with an inclination from the downstream to the downstream side.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the spill-prevention fence is usually required for storage near rivers and quays.
In other words, in the case of a river, the amount that crosses the river diagonally and reaches the opposite bank is stored. The storage place of the fence is a predetermined place in order to stop the diffusion of a contaminant such as oil within a predetermined range at the time of the outflow.

Here, the fence body has a buoyant material or a bag capable of containing gas, and can be floated on a river surface or a sea surface, and has a property of following a wave, It is flexible so that it can be wound up or folded. And it is extended with an inclination from the upstream to the downstream with respect to the flow direction of the installation part. That is, the extension distance of the fence is longer than that of the conventional effluent diffusion prevention fence, but the fluid force is reduced by the amount that the fence body is inclined with respect to the flow, and excessive tension acts on the fence body. It is gone. In addition, the effect of suppressing the skirt turn-up phenomenon and improving the efficiency of recovering effluents, particularly oil and the like can be obtained.

It is preferable that the extension angle θ of the fence body to the downstream side with respect to the flow direction is 110 ° ≦ θ ≦ 135 °. If the extension angle θ is smaller than 110 °, the conventional fence extended at 90 ° is almost the same as the case where it is curved by the flow, so that an effect such as relaxation of the fluid force cannot be obtained. On the other hand, if the extension angle θ is larger than 135 °, there is no difference in the effect of reducing the fluid force, but the required length of the fence body increases, and productivity and workability deteriorate.

[0011] Further, by extending the fence main body from the upstream side to the downstream side with an inclination, the effluent flows along the fence main body and collects at the downstream end of the fence main body. Therefore, the effluent can be collected at a position near the shore, and the collection workability can be improved.
In addition, if the effluent accumulation pit is installed on the shore and the downstream end of the fence body is fixed in the pit, the effluent is guided into the pit and collection becomes extremely easy.

By the way, the fence main body is usually in a storage at the shore, and is extended as needed. That is, one end of the fence main body is fixed to a storage or the like via a fixing device so as to withstand a predetermined tension after the fence is extended, and an extension cord is connected to the other end. This extension cord has a length at least equal to the length of the fence body, that is, if it is a river, it has a length that reaches the opposite bank even if it is laid diagonally along the water bottom of the river. It is installed on the water floor from the shore to the opposite shore, and is connected to the take-up device on the opposite shore. The winding device is installed downstream of the fixing device.

Therefore, when the fence is extended in the present invention, a winding device driven by hydraulic pressure, electric power, or the like may be operated. That is, when the winding rope is wound by the winding device, the fence body is pulled out of the storage in accordance with the winding line, and is stretched to the opposite shore at a predetermined angle while floating on the river surface or the sea surface. It can be easily and reliably expanded even if the flow of the river or the tide is fast. When using a fence body that secures buoyancy by filling gas into the bag, even if the fence is pulled out while inserting air into the fence body, air is supplied after the fence is pulled out. The fence may be raised.

The fence body has a predetermined size and a predetermined number of buoyancy members made of closed-cell styrofoam inside a cloth reinforced with weatherproof and oil-resistant polyester reinforced PVC. Reinforced with a water-resistant polyester tension belt or a float lining and skirt made of polyester reinforced PVC cloth and reinforced with a polyester tension belt and blown into the air chamber with a blower. Various types can be used, such as a type that secures buoyancy by supplying air, and a configuration in which a non-adhesive layer is provided inside a polyester-reinforced rubber plate to form an air chamber.

Further, as the fixing device and the winding device,
A drum or the like having hydraulic or electric power can be used, and it is preferable to provide an automatic stop mechanism at the end of fence extension and / or the end of fence collection. As the automatic stop mechanism, there is a mechanism that stops when the winding amount of the extension rope or the fence is detected and is wound up by a predetermined amount or more, a mechanism that detects a marker indicating the end of the extension or the like and stops, tension generated in the extension rope, or the like. And a mechanism that stops when the tension becomes equal to or higher than a predetermined tension can be adopted. Furthermore, a wire or a chain that sinks to the bottom of the water is used as the extension rope.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing one embodiment in which the effluent diffusion prevention fence of the present invention is installed in a river. In FIG. 1, the fence body 1 is made of a polyester-reinforced PVC cloth to which a predetermined amount of a buoyant material 2 made of closed-cell styrofoam is attached as shown in FIG. The fence body 1 is folded and stored on the bank of the riverbank, and the end 1A of the fence body on the lower side of the fold is fixed to an anchor (fixing device) installed in the ground (not shown). A wire 4 (spreading cord) is connected to an end 1B of the fence body on the upper side of the fold through a shackle 3, and an auxiliary buoyant member 5 made of styrene foam of closed cells is attached.

The wire 4 is connected to the end 1B of the fence body 1.
Is laid diagonally to the opposite bank along the slope of the bank and the riverbed, and connected to the hydraulically powered drum 6 (winding device) installed on the bank of the opposite bank and downstream of the anchor (fixing device) Have been. Therefore, when the drum 6 is rotated, the wire 4 is wound up, and the fence main body 1 is drawn obliquely to the river surface and expanded. At the same time as the fence main body 1 crosses the river, the rotation of the drum 6 automatically stops, and the extension of the fence ends.

Here, the laying angle θ 'of the wire 4 on the downstream side with respect to the flow direction, ie, the flow direction, the anchor (fixing device) and the hydraulically powered drum 6 (winding device)
Is 120 °. Therefore, if the fence main body 1 is extended, the extension angle θ of the fence main body 1 to the downstream side with respect to the flow direction is also 120 °.

FIG. 3 is a view showing a state in which the fence body 1 is being extended or being recovered. In FIG. 3, one end of the fence main body 1 is fixed to the axis of a hydraulically powered drum 8 (a fixing device having a recovery mechanism) in a storage 7, and the drum 8 is rotated by the wire 4 when the fence main body is extended. 1 is pulled out, and at the time of collection, the fence body 1 is wound around the drum 8 and collected by the reversing operation of the drum 8. Therefore, in the embodiment shown in FIG. 3, not only the extension of the fence body 1 but also the automatic recovery is possible.

The fence main body 1 in the embodiment shown in FIG. 3 has a float air chamber 1C and a skirt 1D made of polyester reinforced PVC cloth, and a buoyancy is obtained by supplying air into the air chamber 1C. Things. That is, the fence main body 1 wound in a flat plate shape on the drum 8 is supplied with air from the end of the wire 4 at the connection portion side during expansion, and is pulled out while securing buoyancy. Here, the holding roller 9 is attached so that the air in the air chamber does not reach the fence main body 1 on the drum 8 and does not adversely affect the drawer. In addition, at the time of collection, the air in the air chamber is pushed out by the pressing roller 9, and is wound up while being exhausted from the end of the wire 4 on the connection portion side. Therefore,
On the drum 8, the fence main body 1 returns to a flat plate shape, and winding is facilitated.

The fence body 1 with the buoyant material 2 shown in FIG.
Needless to say, the drum 8 shown in FIG. Here, fence body 1 with buoyancy material 2
When air is not used, the air supply / exhaust is not required, so the air supply / exhaust equipment and the press roller 9 are not required. However, the fence body 1 is thickened by the amount of the buoyant material 2, and the drum 8 becomes large.

FIG. 4 is a top view showing the extended state of the fence. Here, FIG. 4 (A) shows a conventional fence, in which the expansion angle θ of the fence body 21 is 90 °, but is actually curved into a shape shown by a dotted line due to the flow in the direction of the arrow and is stabilized. ing. FIG. 4B shows the fence of the present invention. The fence main body 1 has an expansion angle θ of 120 °, but is stable in the shape shown by the dotted line. Further, FIG. 4C shows the fence body 1 according to the present invention.
This shows an example in which the downstream end of (extension angle θ is 120 °) is fixed to the effluent accumulation pit 10 installed on the shore. In FIG. 4C, the stable shape of the fence main body 1 is changed by the presence of the pit 10, and the effluent 11 is guided into the pit 10 and collected.

[0023]

According to the present invention, since the flexible fence main body is extended from the upstream side to the downstream side with respect to the direction of the flow of the installation portion, the flow of the river, the tidal current and the like are reduced. Even if it is fast, the tension applied to the fence body can be reduced, the skirt turn-up phenomenon can be suppressed, and the effluent collection efficiency and collection workability can be improved. In particular, if an effluent accumulation pit is installed on the shore and the downstream end of the fence body is fixed in the pit, the effluent is guided into the pit and collection becomes extremely easy. In addition, the fence body can be automatically extended and collected, and can be easily and quickly repeated as necessary.

[Brief description of the drawings]

FIG. 1 is a diagram showing an effluent diffusion prevention fence of the present invention.

FIG. 2 is an enlarged view showing a fence body having a buoyancy material.

FIG. 3 is a view showing a state in which a fence main body having a bag body capable of filling gas is being expanded or being recovered.

FIG. 4 is a top view showing an extended state of a fence.

[Explanation of symbols]

1 fence body 1A fixed end of fence body 1B winding end of fence body 1C air chamber of fence body 1D skirt of fence body 2 buoyancy material 3 shackle 4 extension wire (wire) 5 ‥ Auxiliary buoyancy material 6 ‥ Winding device (drum) 7 ‥ Storage 8 ‥ Fixing device (drum) 9 ‥ Holding roller 10 ‥ Outflow accumulation pit 11 ‥ Outflow 21 フ ェ ン ス Fence body in conventional fence θ ‥ Flow Extension angle of fence body to downstream side with respect to direction θ '‥ Angle of laying downstream of extension cord (wire) with respect to flow direction

Claims (6)

[Claims] Claims: 1. A fence for spreading on a water surface to prevent diffusion of an effluent, comprising a flexible fence main body having a bag body capable of filling a buoyancy material or a gas, An effluent diffusion prevention fence characterized by being inclined from the upstream side to the downstream side with respect to the flow direction. 2. The effluent diffusion prevention fence according to claim 1, wherein the extension angle θ of the fence body to the downstream side with respect to the flow direction is 110 ° ≦ θ ≦ 135 °. 3. The effluent diffusion prevention fence according to claim 1, wherein the downstream end of the extended fence body is fixed to an effluent accumulation pit installed on the shore. . 4. A fixing device for fixing one end of the fence main body to the shore, an extension cable connected to the other end of the fence main body and having a length at least equal to or longer than the length of the fence main body, and the extension rope installed on the opposite shore. The effluent diffusion prevention fence according to any one of claims 1 to 3, further comprising a winding device. 5. The effluent diffusion prevention fence according to claim 4, wherein the installation position of the winding rope winding device is located downstream of the fixing device of the fence body. 6. A flexible fence body having a buoyant or gas-filled bag body is fixed at one end to a shore, and an extension cord connected to the other end of the fence body is provided.
In advance, while being installed on the water bottom from the shore on the fence fixed side to the opposite shore, connected to a winding device installed on the downstream side of the opposite shore, by operating the winding device, with respect to the direction of flow, A method for spreading an effluent diffusion prevention fence, comprising: extending a fence body with an inclination from an upstream side to a downstream side.