JPS6027330B2 - floating type oil fence - Google Patents

Description

[Detailed description of the invention] The present invention relates to a floating boom.

Generally, a floating type oil fence is installed by attaching one end of an anchor rope at an appropriate interval along the length of the oil fence, and fixing the other end to an anchor sunk in the seabed.

In recent years, as petroleum cargo handling facilities have become larger due to the increase in demand for petroleum, a large number of dolphin sea berth-type cargo handling facilities 3, which can dock two tankers a and b at the same time, as shown in Figure 1, have been constructed. There is. For such a sea berth, a floating oil fence 1 is arranged so as to surround two tankers, assuming simultaneous berthing of the tankers, and is fixed with an anchor rope 2. The oil fence 1 arranged in this manner is raised to the surface and surrounds the tanker a at the same time as the tanker a is docked for cargo handling.

When another tanker b approaches for cargo handling while tanker a is carrying out cargo handling work, the oil fence 1 is lowered and resurfaced at the same time as tanker b docks. moreover,
When tanker a, which finished its cargo handling work first, sets sail,
The oil fence 1 is lowered again, and after the tanker a sets sail, it is resurfaced. However, during repeated operations to raise and lower the oil boom, for example, if an oil spill occurs on one tanker during cargo handling, and another tanker approaches and it is necessary to lower the oil boom, this may occur. It is completely defenseless against oil spills, and the oil fence itself is not functioning properly, which is extremely dangerous. The present invention aims to eliminate the above-mentioned drawbacks, and its gist is to provide a floating oil boom made of a band-shaped elastic body having a tubular float part in a substantially closed area surrounding an offshore structure. In addition to holding an exhibition to define the
Furthermore, the oil fences that bisect the closed area are extended almost directly below the offshore structure, and these oil fences are raised and lowered independently by air supply and exhaust.

Next, the present invention will be explained in detail with reference to FIG.

Note that the floating oil fence 1 used in the present invention may be of any type commonly used. For example, a SADORO float hose that controls the buoyancy of an oil boom by being filled with air, fins extending at the upper part of the float hose in the longitudinal direction, and a skirt extending at the lower part are integrated using rubber, synthetic resin, etc. using a conventional method. Some are constructed by press molding. In order to improve the upright stability of the fence, bells are attached to the lower end of the skirt in the longitudinal direction with bolts or the like at appropriate intervals. floating type oil fence A
As shown in Figure 2, tankers a and b arriving at a sea berth or other offshore structure 3 are first placed in a line surrounding the tankers a and b, forming a substantially closed area, and then sunk into the seabed. Fix it with anchor 2.

Further, a floating oil fence C is extended across right below the offshore structure 3 so as to partition the closed area. In this case, it is not necessary to directly connect the oil fences A and B that form the closed area and the oil fence C that crosses the offshore structure 3, but it is preferable to connect them by appropriate means, and at the connection part, each To prevent the air from passing through the oil fence by sealing the float hose sections of the oil fence without allowing them to move toward each other. In addition, under the sea surface of the offshore structure 3, there are piles etc. that are arranged at narrow intervals to support the structure 3, so when installing the partition oil fence C, it is necessary to Of course, even during floating and sinking operations, the oil fence should be fixed with an anchor rope or the like so that it does not come into contact with piles, etc. For example, the anchor can be taken from the middle of a group of piles.

In this way, each berth can be independently surrounded by oil booms A and B that define a closed area surrounding the offshore structure, and oil fence C that bisects the closed area.

Next, the floating and sinking methods of the floating and sinking oil fences A and B, which are installed around offshore structures, will be explained.

In FIG. 2, P, , P2, and P3 are pumps installed on the offshore structure 3 for supplying air to the float hose portions of the oil booms A, B, and C.

In the figure, 5 to 12 are air hoses that connect pumps P, P2, and P3 to the float hoses of oil booms A, B, and C, respectively, and I3 to 16 are air hoses that connect oil booms A, B, and C, respectively. This figure shows a construction fence provided between each air hose of oil booms A, B, and C, which has a means for first starting to lower the oil booms A, B, and C when the oil booms are lowered. Although details are not shown, such fences may be made of a well laid, plastic vertical pipe as described in Tsubaki Kosho No. 49-44374, or a large construction float and a heavy weight attached to its corresponding lower end. There is a fence made up of Further, 20 in the figure is attached to a first oil fence C extending almost directly below the sea berth 3,
This is a floating device that vertically floats and sinks the oil fence C so that it does not come into contact with the pile. In the floating type boom of the present invention, air is applied independently to the float hose that controls the buoyancy of each boom. For example, when tanker a docks on the right bank of sea berth 3 for cargo handling work, air hoses 6, 7, 8,
Open the valves (not shown) leading to 9, 11, and 12,
By activating the pumps P, P2, and P3 to levitate the oil fence A and the oil fence C, which extends almost directly below the sea berth 3, out of the oil booms A and B that form a closed area surrounding the offshore structure. , Tanker a is completely surrounded by floating oil booms A and C while leaving oil boom B on the left side lowered.

Afterwards, when tanker b docks on the left bank of sea berth 3 for cargo handling work, the valves leading to air hoses 5 and 10' are opened and P, , P2, and P3 are activated again to surround tanker b on the left bank. The oil fence B is further floated. In this way, tankers a and b can be surrounded independently by the respective oil booms A, B and C. When tanker a finishes cargo handling work and leaves the berth, or when tanker a is evacuated due to an oil spill accident caused by tanker b, the air is vented by opening the valves leading to the air hoses 6 and 11. , the oil fence A is quickly lowered from the position of the component fence 14.

In addition, after tanker a departs from the berth, or when tanker b finishes cargo handling work and departs from the berth after dealing with an oil spill, the valves leading to air hoses 5, 7, 8, 9, 10, and 12 are opened. By venting the air, the oil fence B can be moved from the position of the component fence 13 and the sea berth 3.
An oil fence C extending almost directly below is quickly lowered from the position of constituent fences 15 and 16. In addition,
The oil fence C extending almost directly below the sea berth 3 sinks smoothly from the flotation device 201 without coming into contact with piles or the like. According to the present invention, the oil fences are not only arranged so as to simply surround the sea berth as in the case of a subordinate ship, but also extend directly below the offshore structure, and these oil fences are made independent of each other. Since the floating structure can be floated and submerged, each berth of the offshore structure can be used effectively and efficiently.

In addition, if two tankers dock at the berth at the same time and an oil spill occurs on one of the tankers during cargo handling operations, the other tanker can be completely evacuated while the tanker that caused the accident is completely surrounded. Therefore, it is extremely useful as a countermeasure against oil spill accidents.

[Brief explanation of the drawing]

Figure 1 is a line diagram showing an example of the installation of conventional floating oil fences that are installed in a spiral manner so as to surround a sea berth, and Figure 2 is a line diagram that shows an example of the installation of a floating oil fence of the present invention that is installed in a line that surrounds a sea berth. It is. A, B, C...Floating oil fence, 2...
・・・．・Anchor rope, 5-12... Air hose for air intake and exhaust of oil fence, 13-16...
・Configuration fence, 20...Flotation device. Figure 1 Figure 2

Claims (1)

[Claims] 1. A floating oil fence made of a band-shaped elastic body having a tubular float part, which is extended to the right and left so as to surround an offshore structure and define a substantially closed area; and the offshore structure. and an oil fence that extends almost directly below the oil fence and bisects the closed area, and these oil fences are configured such that air communication between the oil fences is blocked at the connecting portion, and air is supplied and exhausted to and from each oil fence. This floating type oil fence is characterized in that the three oil fences that partition the right side, the left side, and the closed area are made to float and sink independently.