JPS5917963Y2 - oil fence - Google Patents

Description

[Detailed explanation of the idea] This idea concerns oil fences.

In recent years, efforts have been made to ensure a stable and sustainable supply and safe storage of oil.
For example, offshore stockpiling of oil is being considered using a plurality of storage tanks moored within a tank yard surrounded by a breakwater or the like.

In such tank yards, in order to minimize the spread of oil leakage from the tank,
An oil boom is provided for each tank or several tanks.

Oil fences must be sufficiently high above the sea surface and sufficiently deep below the sea surface to reliably prevent oil spills.

However, when an oil fence is fixedly attached to a breakwater, etc., the height and depth mentioned above change depending on changes in the tide level, so if you try to always meet the above requirements, the height of the entire oil fence will increase. This is uneconomical.

This idea was made in view of the above circumstances, and was designed to create an oil fence that can follow changes in the tide level, is compact, and can reliably prevent oil spills. This is what we provide.

This invention will be explained in detail below with reference to embodiments shown in the drawings.

Figure 1 shows a tank yard surrounded by a sea wall 1 and a breakwater 2. A plurality of oil storage tanks 3 arranged in parallel are moored on the sea surface inside the yard. A pair of moored dolphins 4 are erected on the seabed on the sides of the tank 3 at both ends.

One side of the breakwater 2 facing the seawall 1 has fixed parts 5 erected on the seabed corresponding to each pair of dolphins 4, and is arranged between the fixed parts 5, and can be removed when the tank 3 is taken in or taken out. A movable part 6 is provided between the fixed part 5 and the movable part 6, and the structure is such that oil can be prevented from flowing out.

Bridges 7 for management, piping, etc. are constructed between every other breakwater fixed part 5 and the seawall 1.

Oil fences 10 are installed between the adjacent oil storage tanks 3, 3, between the breakwater fixing part 5 and the dolphin 4, between the pair of dolphins 4, 4, and between the dolphin 4 and the revetment wall 1. (See Figure 2)
.

The oil fence 10 includes a vertical plate-shaped fence main body 11 floating on the sea surface, and structures fixedly installed on the sea surface (breakwater fixed part 5, mooring dolphin 4, seawall 1, etc.) at both ends of the fence main body 11. It consists of a connecting part 12 that connects the parts.

As shown in FIG. 4, the fence main body 11 is composed of a relatively thin steel plate with a vertical cross section of a ■ shape, and a buoyant body 14 made of styrofoam is attached to the upper part of the center of the plate via a slip stopper 13. A vertical stiffener 15 is provided as required.

The upper and lower flanges 16, 17 of the fence body 11 increase the rigidity of the fence body 11, and in particular the upper flange 16 prevents waves and oil from flying around, but these are not always necessary.

Further, the material of the buoyancy body can be changed as appropriate, and the buoyancy body can also be made into a tank.

The shape and dimensions of the fence main body 11 are such that it floats on the sea surface and maintains a vertical state due to its own weight, and has sufficient height above the sea surface and depth below the sea surface to reliably prevent oil spills. will be determined.

Details of the connecting portion 12 are shown in FIG.

Corresponding detachment members 21 and 22 are vertically provided on both ends of the fence body 11 and the revetment wall 1, etc., and a pair of upper and lower attachment members parallel to each other are provided at both upper and lower ends of these members 21 and 22. Both ends of the connecting member 23.23 are connected to the pin 2.
4, it is rotatably attached.

The pins 24 on the removable member 22 of the revetment wall 1 etc. are fitted into long holes 25 formed in the connecting member 23, so that even if the fence main body 11 moves up and down, the revetment wall 1 etc. and the fence main body 11
The connecting member 23 is configured to rotate relative to the detaching member 22 and to be able to move slightly in the longitudinal direction so that the horizontal distance between the connecting member 23 and the detachable member 22 does not change (see FIG. 6).

The detaching member 21.22 and the connecting member 23.23 include
The four sides of a rectangular elastic membrane 26 made of rubber, vinyl, or the like are each bonded with an adhesive.

This membrane 26 has four corners cut out and a central part loosened in advance so as not to restrict the movement of the detachable members 21, 22 and connecting members 23, 23 that follow the vertical movement of the fence main body 11. It is stretched.

In addition, the height of the connecting portion 12 is set such that it can always maintain a sufficient height above the sea surface and a sufficient depth below the sea surface even when the tide level changes.
It is larger than the total height of the fence body 11.

The method of attaching the membrane 26 is not limited to that in the embodiment; for example, each member 21, 22, 23 may be constructed of two plates, and the membrane 26 may be sandwiched between these plates and fixed with bolts or the like. Good too.

In the above, the fence main body 11 moves up and down according to changes in the tide level, and the connecting part 12 assumes a rectangular shape when the tide level is the highest (at high tide), as shown in FIG. 2, and when the tide level is at its lowest (low tide). ), it deforms into a parallelogram as shown in FIGS. 3 and 5.

Even if the tide level changes, by deforming the connecting portion 12 in this way, the water in the fence body 11 is always kept constant, and any part of the fence body 11 or the connecting portion 12 is always above sea level. By ensuring sufficient height and sufficient depth below the sea surface, oil spills can be reliably prevented.

In addition, since the fence body 11 follows changes in the tide level,
By suppressing the height to the necessary minimum, the entire oil fence 10 can be configured to be compact.

As described above, in the oil fence according to this invention, the vertical plate-shaped fence main body 11 is floated on the sea surface, and a pair of upper and lower connecting members are connected to the structure fixedly installed on the sea surface and the end of the fence main body 11. Both ends of the fence 23 are rotatably attached, and an elastic membrane 26 is stretched in a space surrounded by the structure, the fence body 11, and the connecting member 23, so that it follows changes in the tide level. As a result, it is possible to have a compact structure and to reliably prevent oil and the like from flowing out.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a plan view of the tank yard where the oil fence is installed, Figs. 2 and 3 are front views showing the oil fence at high tide and low tide, respectively, and Fig. 4 is a plan view of the tank yard where the oil fence is installed. The figure is a perspective view of the fence body, FIG. 5 is an enlarged view of section A in FIG. 3, and FIG. 6 is a partially enlarged view of FIG. 5.

Claims (1)

[Scope of utility model registration request] A vertical plate-shaped fence main body 11 is floated on the sea surface, and both ends of a pair of upper and lower connecting members 23 are rotatably attached to a structure fixedly installed on the sea surface and an end of the fence main body 11. Cage, the above structure, fence body 11
and an oil fence in which an elastic membrane 26 is stretched in a space surrounded by a connecting member 23.