JPS6040676Y2 - Oil fence device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an oil boom device that utilizes the vertical upward flow (bubble energy) of a group of bubbles.

The purpose of this invention is to properly dam the oil layer even when it is tilted by wave movement or tidal current, and to effectively prevent the oil from dispersing and dissipating. It is about providing.

For example, the conventionally known bubble-type boom device described in Japanese Patent Application Laid-Open No. 54-73430 is characterized in that it utilizes bubble energy.

To explain this with respect to Figure 1, a long float 1 is provided with a skirt 2 of a certain depth that is shaped like a sheet along the length of the float 1, and a series of water-permeable nets 3 are placed below it. The structure is such that the net 3 is suspended from the net 3 and a bubble ejection pipe 4 is attached to the lower end of the net 3.

In addition, 4a... in the figure is a pore for blowing out bubbles.

When the bubble boom device having the above configuration is used in the operating state shown in FIG. are formed equally on both sides of the skirt portion 2, and effectively prevent the oil layer 6 on the sea surface 5 from passing under the skirt portion 2 to the opposite side, resulting in an excellent effect as an oil fence.

However, when the skirt part 2 and the net 3 are tilted at a certain angle from the vertical position due to wave motion or tidal currents, as shown in Figure 2B, the vertical upward flow of the bubble group is caused by the tilted skirt part 2 and net 3. It occurs only on the upper surface side (right side in FIG. 2B).

Therefore, when the oil layer 6 exists on the lower surface side (left side in FIG. 2B) as in the illustrated example, the vertical upward flow of the bubble group has almost no effect on the oil layer 6.

For this reason, the oil layer 6 often slips under the skirt portion 2 and crosses over to the opposite side as shown by arrow A due to wave motion or tidal currents, which has the drawback that it is insufficiently effective as an oil fence.

In particular, in oil fence devices installed and used at sea, the skirt portion 2 and net 3 may become damaged due to waves or currents.
It is a natural prerequisite to tilt as shown in Figure B.

Therefore, the degree of fatality of the above-mentioned defects was extremely large.

The purpose of this invention is to provide an improved oil fence device with an extremely small degree of tilting due to wave motion or tidal currents, and even if it tilts, the vertical upward flow of bubbles will hardly change the effect of damming the oil layer. It's about doing.

The ultimate purpose of this invention was to provide a symmetrical net on the lower edge of the skirt in a shape corresponding to the left and right sides of an isosceles triangle or rectangle, and to create a slanted net across the lower edge of the net. To provide an oil fence device having a structure in which a prevention plate and a net are combined and a bubble ejection pipe is installed on the tilt prevention plate.

Next, this invention will be explained with reference to embodiments shown in FIG. 3 and subsequent figures.

FIG. 3 shows an oil boom device that is a first embodiment of this invention.

Directly below the elongated float 1, a sheet-shaped skirt part 2 of a constant depth is provided along the longitudinal direction of the float 1, and the lower edge of the skirt part 2 corresponds to the isosceles (hypotenuse) of an isosceles triangle. Two nets in a symmetrical shape 3, 3
are provided in the longitudinal direction of the skirt portion 2, and the left and right nets 3.3
A plate 7 for preventing inclination due to waves, currents, etc., which is made of a stainless steel plate of a considerable width, is connected to the lower edge of each net 3, 3 by a connecting ring 8.

Then, a long bubble ejection pipe 4 is installed along the inner side formed by both nets 3 on the inclination prevention plate 7, and the bubble ejection pipe 4 is connected to the inclination prevention plate 7 by a support ring 9. It is fixed by welding.

In the figure, 4a... are pores for blowing out bubbles.

The oil fence device having the above-mentioned structure is installed and used at sea in a position where the bubble ejection pipe 4 is on the side of the oil layer 6, as shown in FIG. 4A.

In such a case, the vertical upward flow of bubbles ejected from the bubble ejection pipe 4 from its pores 4a will occur at the lower part of the skirt portion 2 and rise, as shown by the streamlines in FIG. 4A. The oil layer 6 floating on the sea surface on the middle right side is well prevented from slipping under the skirt part 2 and crossing over to the left side.

In particular, the anti-tilt plate 7 creates a large resistance to change its direction due to wave motion or tidal currents, that is, it produces a balancing action that always tries to maintain a horizontal position, so it is difficult for this oil fence device to tilt due to wave motion or tidal currents. There are almost no such things.

In order to more effectively produce the above-mentioned balancing action, a weight 14 is attached to the center position of the lower part of the tilt prevention plate 7, and air is supplied to the bubble ejection pipe 4 to cancel the buoyant force acting on it and prevent the tilt. The stable sedimentation state of the prevention plate 7 in seawater is maintained.

This idea can also be applied to the second embodiment shown in FIG. 5, which will be described later.

Furthermore, even if the boom device is tilted as shown in Figure 4B, if the bubble ejection pipe 4' is unevenly located in the right inner corner, the vertical upward flow of the bubble group will mainly flow toward the skirt. Part 2
Therefore, the oil layer 6 is still effectively prevented from passing under the skirt portion 2 and overflowing to the left side, that is, it has an excellent fence effect for damming up the oil.

Next, FIG. 5 shows an oil boom device which is a second embodiment of this invention.

This is provided with a sheet-shaped skirt portion 2 having a constant depth along the longitudinal direction of an elongated float 1, and the skirt portion 2 is formed at a constant pitch in the longitudinal direction of the skirt portion 2 at the lower end edge of the skirt portion 2. Hanging bars 10 of a fixed length are installed horizontally in an orthogonal arrangement, and nets 3, 3 are vertically symmetrically hung at both ends of the hanging bars 10, and the nets 3, 3 are made of stainless steel plate with the nets 3, 3 passing at the lower ends. The inclination prevention plate 7 and the nets 3, 3 are connected by a connecting ring 8.
It is connected with...

Then, a long bubble ejection pipe 4 is installed at an arbitrary position on the upper surface of the inclination prevention plate 7 along the inner side formed by the left and right nets 3, and the ejection pipe 4 is connected to the inclination prevention plate by a support ring 9. It is fixed by welding to 7.

In the figure, 4a... are pores for blowing out bubbles.

The suspension bars 10... are connected to the lower edge of the skirt portion 2 with suspension rings 11..., and are connected at both ends with two support lines 12, 12 stretched symmetrically from the bottom of the float 1. The part is suspended.

The nets 3, 3 have hanging rings 13 at their upper edges connected to the hanging river 10.

The oil boom device of this embodiment is installed and used on the sea with the bubble jetting pipe 4 facing the oil layer 6 side, as shown in FIG. 6A.

In this case, the vertical upward flow of the bubble group effectively acts to dam the oil layer 6, and in particular, the tilt prevention plate 7 exerts a balancing action to maintain its horizontal position, and the oil fence device is prevented by wave movement or current. It almost never happens that it tilts.

Furthermore, even if the bubbles are tilted as shown in FIG. Therefore, the oil layer 6 is still effectively prevented from passing under the skirt portion 2 and overflowing to the left side, and the fence effect of damming up the oil is excellent.

Next, FIG. 7 shows an oil boom device according to a third embodiment of this invention.

This is provided with a sheet-shaped skirt part 2 having a constant depth along the longitudinal direction of the float 1 immediately below the elongated float 1, and a skirt part 2 having a constant depth in the longitudinal direction of the skirt part 2 at the lower edge of the skirt part 2. Hanging bars 27 of a predetermined length are installed horizontally at a pitch perpendicular to the skirt portion 2, and the water-permeable net 3 has both end edges of each hanging bar 27... It has a configuration in which the net 3 is attached to both ends to form a V-shape, and a bubble ejection pipe 4 is installed at the bottom of the net 3.

Thus, each suspension bar 27 is connected to the lower end edge of the skirt portion 2 with a suspension ring 28, and both ends thereof are suspended by two support lines 29 and 29 stretched symmetrically from the bottom of the float 1. It is installed almost horizontally.

The net 3 is attached by connecting connecting rings 30, 30 at both ends thereof to both ends of the hanging par 8.

The bubble ejection pipe 4 is fixed to the bottom of the net 3 by support rings 31 .

When the oil fence device having the above configuration is used at sea with the skirt portion 2 in a vertical position as shown in FIG. Similar to the conventional example shown in FIG. 2A, the vertical upward flow is generated by being divided into approximately equal parts on both sides of the skirt portion 2.

Therefore, the oil layer 6 on the sea surface 5 is well prevented from slipping under the skirt portion 2 and crossing over to the opposite side.

Moreover, even when the skirt portion 2 and the net 3 are tilted at a certain angle from the vertical position due to wave motion or tidal current, as shown in FIG. 8B, the pores 4a tilted at the same angle...
Since there are no obstacles in the streamline direction, the bubbles ejected from the pores 4a are ejected in the same direction as the inclination angle of the pores 4a, and freely flow and rise.

For this reason, the bubble group mainly forms a vertical upward flow on the upper surface side of the skirt portion 2, but a portion of the bubbles necessarily flows around the lower surface side of the skirt portion 2, causing an upward flow along the inclination of the skirt portion 2. arise.

Therefore, even when the oil layer 6 exists on the lower surface side, as shown in FIG. Never.

Therefore, as an oil fence device that is installed and used on the sea, it is natural for the skirt portion 2 and the net 3 to tilt as shown in Fig. 8B due to wave motion or tidal currents.
It has an excellent fence effect to block oil and exhibits high stability.

Since the gist of this invention is an oil boom device having the structure described in the claims of the utility model registration, it has the following effects.

■ A vertical upward flow of bubbles ejected by the bubble jetting tube is always effectively generated on one side of the skirt (oil damming side) not only in the vertical state but also in the tilted state, and the oil goes under the skirt. Often prevents it from crossing to the other side.

■ Therefore, it effectively prevents the diffusion and dissipation of the oil layer and provides an excellent oil fence effect.

- In particular, the anti-tilt plate very effectively resists tilting of the fence due to wave motion and tidal currents and maintains the vertical position well, making the oil fence effect as effective as possible.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing a conventional oil boom device;
Figures A and B are explanatory diagrams of the oil fence device in use, Figure 3 is a perspective view showing the first embodiment of this invention, Figure 4A,
B is an explanatory diagram of the previous oil fence device in use, FIG. 5 is a perspective view showing the second embodiment of this invention, and FIG. 6A.
B is an explanatory diagram of the usage state of the same oil fence device. Figure 7 is a perspective view showing the third embodiment of this invention, Figure 8A
, B is an explanatory diagram of the use state of the same oil fence device and the fence effect. 1...Float, 2...Skirt part,
3...net, 4...bubble ejection tube, 7
・・・・・・Anti-tilt plate.

Claims (1)

[Scope of utility model registration request] Directly below the float, a skirt part with a constant depth is provided along the length of the float, a net is provided in a symmetrical shape on the lower edge of the skirt part, and an anti-tilt plate and the net are provided on the lower edge of each net. An oil fence device characterized by a configuration in which a bubble ejecting pipe is installed so as to be connected to the top surface of an inclination prevention plate and located inside surrounded by left and right nets.