JPS5815563B2 - Oilseed guide fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weir-type oil recovery guide fence for the purpose of recovering oil spilled in large quantities onto the sea.
More specifically, it can be used in combination with an oil fence on the sea where there is a tidal current, or by connecting a towing boat to guide the oil slick from the opening so that it converges in a figure 7 shape.
This is a guide fence that allows the oil film to accumulate at oil recovery parts such as recovery tanks as a twice as thick oil film.

Conventionally, methods such as adsorption belts, rotating drums, and weir-type suction have been used to recover large amounts of spilled oil floating on the sea, but each method has advantages and disadvantages depending on the properties of the spilled oil.
Additionally, both methods have problems in adaptability when there are fast currents or high waves.

The present invention relates to a weir-type guide fence, but as shown in FIG.
2, a heavier arm or aluminum pipe (approximately 8m)
) 23 must be installed protrudingly, and the area around the suction part becomes U-shaped due to fluid resistance during towing, causing accumulated oil to leak from the skirt F of the fence 21, and when the towing speed or flow rate becomes high. The fence 21 has disadvantages such as pressure on the water stream side and the lower part of the main body opening in a figure-eight shape, causing leakage of accumulated oil.

The basic guide fence generally has a V-shaped oil recovery guide fence 21 as shown in Fig. 2. If it is a mobile type, it is necessary to maintain the opening 25 at a constant width with an arm or rope attached to the ship. If the type is fixed at sea level, it is necessary to keep the opening 25 fixed using an anchor or the like.

In addition, there is an oil recovery section 2 such as a recovery tank at the inner end of the V-shaped fence.
4 needs to be fixed.

During construction, the length of the oil recovery guide fence is practically required to be approximately several meters to 20 meters, so the oil recovery guide fence itself must be able to bend in response to waves in order to be adaptable to waves. .

However, if the guide fence for oil recovery is given flexibility in the vertical and horizontal directions, it is inevitable that the fence will become U-shaped as shown in Figure 3 due to the resistance of the seawater, and this deformation of the fence will cause oil recovery. The ability of the portion 24 to collect oil and water is significantly inhibited.

Therefore, in order to maintain the oil recovery guide fence 21 in a figure 7 shape, as shown in FIG. is necessary.

In addition, oil and seawater flowing into the oil recovery guide fence from the opening gradually taper from the shape of the main body, so it becomes V-shaped in the flow direction, but when looking at the cross section, the underwater bottom of the fence 21 The section is expanded outward and the entire fence is inclined in a figure eight shape as shown in Fig. 5, and most of the seawater flows out from the lower end along the inclined surface of the oil recovery guide fence 21. Accordingly, the oil collected in the V-shaped oil recovery guide fence 21,
This causes the oil to flow outside, so in order to straighten this V-shaped sloped fence vertically, it is necessary to use a method such as tying the lower parts of the guide fence for oil collection with tension wire. be.

The present invention satisfies the various demands mentioned above.

Hereinafter, in FIGS. 6 to 9 for explaining embodiments of the present invention using drawings, the guide fence A for oil recovery of the present invention is F
A plurality of single bodies 2, 2... made of rigid plates such as RP plates and aluminum plates are connected via connecting plates 3, 3... made of rigid plates such as FRP plates and aluminum plates. They are connected to form main bodies 1, 1 with a length of several meters to about 20 meters, and on both sides of each of the main bodies 1, 1, there are floating bodies 4, 4 made of air sacs, foam, etc. are provided at appropriate intervals along the longitudinal direction of the main bodies 1,1.

The pair of main bodies 1, 1 are assembled in a figure 7 shape, and one end is connected directly or indirectly to the oil recovery section 5 to be closed, and the other end is open.

Here, a connecting plate 3.3 is applied to each side of each unit 2 so as to extend between adjacent units, and the unit 2 and the connecting plate 3 are connected with bolts 6, 7 or the like.

In this case, as shown in FIGS. 8 and 9, two bolts 6.6 are inserted into one unit 2 to connect the connecting plate 3 to the unit 2.
and is connected to the other unit 2 by one loose bolt 7 so as to be rotatable with respect to the other unit 2.

Since the single bodies 2, 2 and the connecting plates 3゜3 have rigidity in the direction perpendicular to their respective plate surfaces and flexibility in the direction parallel to the plate surfaces, the main bodies 1, 1 do not touch the sea surface. On the other hand, it has rigidity in the horizontal direction and flexibility in the vertical direction.

Further, in order to provide flexibility in the horizontal direction with respect to the plate surface, it is desirable that the edge of the unit 2 secured by the loose bolt 7 be cut out in a curved shape as shown in FIG.

Further, at the end of the main body 1°1 on the opening 8 side, the main body 1,
The front legs 9, 9 for opening the ends of the main bodies 1 on both sides are attached to open outwards, and the front ends of the main bodies 1, 1 are provided with an opening interval between the main bodies 1, 1 between them. A tension line 10 made of a regulating rope or the like is attached so that the oil recovery guide fence A can always be maintained in a figure 7 shape.

It is desirable that a closed-cell body made of oil-resistant plastic be inserted inside the front legs 9, 9 for guiding the legs apart, or that air or the like be sealed therein so that the legs do not sink due to their own weight.

In addition, in order to prevent the cross-sectional shape of the main bodies 1, 1 from being inclined in a figure-eight shape due to water flow resistance and the oil 11 flowing out together with the water flow, the lower ends of the main bodies 1, 1 are made at an acute angle inward to the surface of the main bodies 1, 1. A hydrofoil 1 consisting of plates arranged at appropriate intervals with an inclination angle of
2 is installation.

Furthermore, if necessary, the lower ends of the main bodies 1, 1 may be reinforced at appropriate locations with tension wires 13 such as ropes.

Near the thin opening 8 of the oil film, the depth of the underwater part of the main bodies 1, 1 is reduced to reduce the distance from the center of buoyancy, which serves as a fulcrum, thereby reducing the rotational moment due to water flow drag and reducing the water flow. The depth of each unit 2, 2, etc. is made different so that the depth of the underwater part of the main body 1, 1 increases sequentially as it approaches the oil recovery part 5, thereby preventing oil leakage. To reduce the resistance force caused by water flow,
A hole 1 of an appropriate size is formed on the plate surface below the underwater surface of the main bodies 1, 1.
4 is provided, and a fine mesh 14A made of hydrophilic fibers in the opening 14 is expanded.

Furthermore, since the oil recovery section 5 connected to the main bodies 1 and 1 is generally made of heavy material such as iron, it tends to sink, but in order to prevent this sinking, a main body is installed at the side end of the oil recovery section 5 of the main body 1. 1,
A variable blade 15 made of a plate whose elevation angle can be changed is attached to the front of the upper plate surface of the blade 1, so that the floating blade can be adjusted by the resistance of flowing water.

In the guide fence for oil recovery according to the present invention, the guide fence main body A has rigidity in the direction perpendicular to the plate surface and is bendable in the direction parallel to the plate surface, and the openings of the pair of guide fence main bodies A A leg opening guiding layer is provided at each end, both open ends are connected with tension wire so as to limit the opening angle, and a hydrofoil 12 is provided at the lower end of the guide fence main body A. When the ship 22 engages one point of the open end of the guide fence and tows it, that is, when the guide fence is towed at one point by the ship 22, the guide fence laid by the ship 22 first extends along the ship's side, and then the guide fence is towed by the ship 22. The guide fence main body A that is engaged with the main body A extends along the ship's side, and the other guide fence main body A
When the leg opening inducing layer receives water flow resistance, the legs are opened to the point where the opening angle is regulated by the tension wire, resulting in a state as shown in FIG. 10A.

Next, among the bodies A, the latter body A has its longitudinal direction oblique to the water flow, so the force due to the water flow, more specifically, the horizontal component force a of the water flow, as shown by the vector at the beginning of Figure 10, The main body of is subjected to a force that tends to move it away from the vessel 22.

Therefore, the guide fence as a whole moves in a direction away from the ship 22.

Furthermore, with the movement of the guide fence, a force is generated in the former main body A by the water current that tends to push the main body A back toward the ship 22, as described above.

When the force trying to move the guide fence away from the ship 22 and the force trying to push it back toward the ship 22 are balanced, the guide fence opens its legs in a figure 7 shape and moves away from the ship 22. The movement is stopped and the state shown in FIG. 10C is reached.

Here, the guide fence main body A that is not engaged with the ship 22 has rigidity in the vertical direction with respect to the plate surface, and by providing the hydrofoil 12 at the lower end of the main body A, the main body A Since the main body A is not deformed in the direction perpendicular to the plate surface by the water flow, and the main body A is not tilted due to the action of the hydrofoils 12, the force caused by the water flow can be used effectively.

In other words, in a model without hydrofoils 12, the oil recovery part tilts outward in the direction of water flow as shown in Figure 11A due to water flow resistance, which not only makes it impossible to maintain the guide fence in its normal figure 7 shape, but also reduces the effectiveness of oil recovery. It also has the disadvantage that it also decreases.

Therefore, by providing the hydrofoils 12, the water flow resistance is used to push the oil collecting section back to its normal position, that is, to a position where the water flow direction is opposite to the opening and facing the opening. As shown in the figure, the normal figure 7 shape is maintained and the oil recovery rate does not decrease.

The main body A on the side that is engaged with the ship 22 is subjected to a large force due to the towing of the ship 22, so the main body A does not need to have rigidity in the direction perpendicular to the plate surface, but it is not necessary to have rigidity in the direction perpendicular to the plate surface. Therefore, it is desirable that both of the pair of main bodies have rigidity in the direction perpendicular to the plate surface.

For the above reason, the guide fence can be towed by the ship 22 at one point.

Since the present invention is constructed as described above, it has the following features.

That is, (1) by connecting the single bodies 2 and 2 made of rigid plates in a manner that has rigidity in the direction perpendicular to the plate surface and flexibility in the direction parallel to the plate surface, the main body 1, 1 has rigidity in the horizontal direction and flexibility in the vertical direction with respect to the sea surface, so the guide fence A for oil recovery can be installed without using many tension lines such as ropes.
does not become U-shaped due to seawater resistance during use, and oil water can be smoothly reinforced to the oil recovery section 5.
Furthermore, it is adaptable to waves, and even if there are waves, it is possible to prevent oil from leaking from the lower part of the oil recovery guide fence A.

(2) Since the main bodies 1, 1 have rigidity in the horizontal direction with respect to the sea surface as shown in (1), the figure 7 shape can be maintained by fixing one end of the main bodies 1, 1.

At the end of the main bodies 1, 1 on the side of the opening 8, the front legs 9, 9 are attached to the ends of the main bodies 1, 1 so as to open outwards, and at the tips of the main bodies 1, 1, the front legs 9, 9 are attached. Since a tension line 10 such as a rope is provided between the two bodies to regulate the opening interval of the main bodies 1, 1, the oil recovery guide fence A is always maintained in a V-shape during use to ensure oil recovery. be able to.

(3) Hydrofoils 12 made of plates are attached to the lower ends of the main bodies 1, 1 at appropriate intervals with an acute inclination angle inward to the side plate surfaces of the main bodies 1, 1, so when in use, water flow resistance causes the main bodies 1 , 1 has a cross section inclined in a figure eight shape to prevent the oil 11 from leaking out together with the water flow.

In other words, the hydrofoil 12 exerts a force on the lower end of the main body 1.1 to move inside the figure 7 shape according to the speed of the water flow, which is balanced with the lateral pressure caused by the water flow resistance and can keep the main bodies 1.1 vertical. .

(4) Near the opening 8 where the oil film is thin, the depth of the underwater part of the main bodies 1 and 1 is reduced to reduce the distance from the center of buoyancy, which serves as a fulcrum, to reduce the rotational moment due to water flow drag, and the oil recovery section 5, the main body 1, 1
By forming the underwater part so that the depth thereof gradually increases, it is possible to reduce the force of excess seawater flowing into the oil recovery guide fence A and pushing the lower ends of the main bodies 1 and 1 apart. can.

(5) An opening 14 is provided at the lower part of the underwater surface of the main bodies 1, 1, and a fine mesh 14A made of hydrophilic fiber is provided in the opening 14.
By expanding and fixing it, the oil film and oil particles that have flowed into the oil recovery guide fence A are prevented from passing through, and only water is allowed to pass through, thereby guiding the oil in the desired direction and removing the water. The drag force of the water flow can be reduced in its guiding plane by allowing it to escape to the outside.

(6) By installing the variable wing 15 made of a plate body that can change in the elevation angle range forward with respect to the plate surface of the main bodies 1, 1 at the side end of the oil recovery part 5 of the main bodies 1, 1, when in use. The floating force due to the drag of running water is adjusted, and the weight of the oil recovery section 5 allows the main bodies 1, 1
This can prevent the end of the container from sinking into the water.

As described above, the present invention can provide an excellent oil recovery guide fence.

[Brief explanation of the drawings] Figure 1 is a schematic plan view showing the oil recovery guide fence attached to the oil recovery section with arms, ropes, etc., and Figure 2 is the oil recovery guide fence fixed with anchors. FIG. 3 is a schematic plan view showing the oil recovery guide fence deformed into a U-shape due to water resistance; FIG. Figure 5 is a schematic plan view showing a state in which the opening of each part is restricted; Figure 5 is a cross-sectional view showing a state in which the oil collection guide fence forms a figure eight shape due to water resistance, and oil flows out; Figure 6
7 shows an embodiment of the present invention, FIG. 6 is a plan view, FIG. 7 is a front view, and FIGS. 8 and 9 show a state in which the unit and the connecting plate are connected. The figure is a plan view, Figure 9 is a side view, Figure 10A is a plan view showing the condition at the beginning of towing the guide fence for oil recovery, and the opening of Figure 10 is the relationship between the guide fence in Figure 10A and the water flow inside it. An explanatory diagram showing the relationship. Figure 10C is a plan view showing the oil recovery guide fence in a state where the attitude is normally stabilized by hydrofoils, and Figure 11A is a diagram showing the oil recovery guide fence equipped with hydrofoils. FIG. 11 is a plan view showing the relationship between the guide fence and the oil recovery board when there is no guide fence, and the opening of FIG. 11 is a plan view showing the relationship between the guide fence and the oil recovery section when the oil recovery guide fence is provided with hydrofoils . 1...Main body, 2...Single unit, 3...
... Connecting plate, 4 ... Floating body, 5 ... Oil recovery section, 8 ... Opening, 9 ... Before opening leg guidance, 10, 13 ... tension wire, 12 ... hydrofoil, 14 ... hole, 14A ... net, 15 ... variable blade, A ...Guide fence for oil recovery.

Claims (1)

[Scope of Claims] 1 A plurality of single units made of rigid plates such as FRP plates and aluminum plates have rigidity in a direction perpendicular to each plate surface, and have rigidity in a direction parallel to the plate surface. are connected in series to have flexibility to form a main body, and a floating body made of air sac or foam is provided along the longitudinal direction of the main body on each side of the pair of main bodies, and One end is connected directly or indirectly to the oil recovery part, and the other end is opened to form a figure 7 configuration, and the opening is provided with a split-leg guidance rudder that opens outward, and between the two ends of the opening. A guide fence for oil recovery, characterized in that a tension line made of rope or the like is provided across the main body to regulate the opening interval of the main body. 2. In claim 1, the single unit is made of FRP.
An oil recovery guide fence characterized by being connected via a plurality of connecting plates made of plates, aluminum Uno plates, etc. 3. The guide fence for oil recovery according to claim 1, characterized in that a hydrofoil made of a plate is attached to the lower end of the main body with an acute inclined surface inward with respect to the side plate surface of the main body 1. 4. The oil according to claim 1, wherein the depth of the underwater portion of the main body is small near the permanent opening and gradually increases as it approaches the oil recovery section. Collection guide fence. 5. Oil recovery according to claim 1, characterized in that an opening is provided below the underwater surface of the main body, and a fine mesh made of hydrophilic fiber is stretched over the opening. guide fence. 6. Claim 1, characterized in that a variable wing made of a plate body that can change within a range of elevation angle forward with respect to the upper plate surface of the main body is attached to the end portion of the main body on the side of the oil recovery section. A guide fence for oil recovery.