FR2471310A1 - DEVICE FOR FACILITATING THE USE OF PETROLEUM VESSELS - Google Patents

Abstract

DEVICE TO FACILITATE THE USE OF BANKER OR COMPARTMENT TANKS 4, IN PARTICULAR OIL TANKERS. DEFORMABLE POCKETS 6, 7, 8 IN FLEXIBLE PLASTIC MATERIAL IMPERMEABLE TO LIQUIDS ARE PRESENT IN THE SAID BOTTOMS, THE MOUTHPIECES 9, 10, 11 OF THE POCKETS BEING OUTSIDE THE BOTTOMS.

Description

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  the invention relates to tankers and

oil tankers.

  We know that tankers, whose capacity to trans-

  the port reached today, sometimes even exceeding 500,000 tons of crude oil, returning empty after delivery to their port of loading. In some cases, for the empty returns of these vessels, their bunkers are filled with sea water to lower the center of gravity of the vessel and

  ensure a good performance at the sea.

  These empty returns do not provide any benefit. the loading and unloading of seawater, when using this ballast, is costly and leads to oil discharges into the sea, which is undesirable

no point of view.

  Recent shipwrecks have shown on the other hand that

  It was desirable to provide devices that

  as much as possible, the flow of the products contained

  in oil tankers when a damage affects their hull.

  the object of the invention is to provide a device facilitating the use of tankers, in particular oil tankers, and suitable for allowing the use of such vessels for the transport of liquid products other than petroleum products, for example liquids or fresh water during empty returns, without the existence of

risk of mixing liquids.

  Another object of the invention is to provide a device

  tif to delay or even prevent the flow of the liquid, carried by the ship, into the sea during a

  tearing or tearing affecting the hull of the ship.

  the device according to the invention is simple, not very

  and does not limit the loading capacity of the vessel.

  the device according to the invention is characterized in that each tank, compartment or hold of the ship is

  equipped with one or more plastic bags

  full, liquid-tight, said pockets occupying, when they are filled with a liquid, all or part of the volume of the hold and, when they are empty, a virtually zero volume,

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  thus maintaining its maximum capacity in the cargo hold.

  The mouths of said pockets allow them to be filled or emptied with liquid, for example wine or fresh water, the mixture of the liquid food with the oil possibly contained in the hold being made impossible

  thanks to the impermeability of the constituent material of the pockets.

  When the entire volume of the cargo hold has to be

  used for a petroleum product, the pockets are complete-

  emptied, for example by pumping. They occupy a virtually nil volume. If desired, means are provided so that the emptied pockets are applied against the walls of the cargo hold. If several pockets, not communicating with each other, equip the same hold, it is possible to

  transport in this same hold several different liquids

ent.

  In a preferred embodiment of the invention,

  the pockets are placed in the bunkers so as to apply

  when they are empty, against the cargo walls separating it from the sea, thus forming an internal lining for the cargo hold. In case of perforation of said wall of the cargo hold, for example in case of tearing of the hull of the ship, the bag is applied by the hydrostatic pressure of the liquid contained in the hold against the opening of the wall, and thus plays a role in temporary holding role of the liquid

  transported whose flow to the sea is pocketed.

  An exemplary embodiment of the invention will now be

  No. 1 is a sectional view of the hull of a vessel equipped with pockets according to the invention; and FIG. 2 is a sectional view on a larger scale of the hull of a vessel equipped with a pocket, a

damage having affected the hull.

  In Figure 1, an oil tanker 1 comprises a hull 2 and a floor 3 defining a bunker or compartment 4 suitable for receiving oil. the hold 4 can be filled

through an orifice 5.

  According to the invention, the compartment 4 is lined with pockets 6, 7 and 8 with mouths 9, 10 and 11 formed in the floor 3. The pockets are formed by a membrane 12. In the drawing, the pockets 6 and 7 are filled with a liquid, while the bag 8 is empty. This pocket 8, disposed near the side 13 of the shell, is applied against the inner wall 14 of the cargo hold, this wall 14 being at the same

  time the inner face of the flank 13 of the hull. The compartment

  4 is lined with oil in which the pockets are immersed. The mixture of liquids contained in the pockets with

  oil is prevented by the wall of the pockets.

  In FIG. 2, an accidental perforation 20 affects the sidewall 13 of the shell 2. On the internal face 14 of the sidewall 13,

  side which forms the wall of the compartment 4, is applied the po-

  8. The petroleum product contained in the cargo hold applies.

  the pocket 8 by hydrostatic pressure against the wall 14.

  Said pocket is in particular applied against the perforation

  20 by which it protrudes slightly. V'applica-

  pressure of the pocket 8 against the face 14 prevents the oil from flowing through the perforation 20. The pocket according to

  the invention thus plays a role of retaining the trans-

  worn, preventing it from flowing to the sea Dar an opening

accidental hull.

Claims (4)

  1. Device to facilitate the use of boats   bunker tanks or compartments (4), in particular oil tankers, characterized in that deformable bags (6, 7, 8) of flexible liquid-impervious plastics are present in said bunkers, the mouths (9, 10, 11) of the   pockets being external to the bunkers.   2. Device according to claim 1, characterized in   a pocket (8) is applied, when empty,   be a wall of the hold, in particular the wall (14) which separates the cargo hold from the sea.   3. Device according to any one of the claims   preceding, characterized in that the pockets are suitable for   accommodate food liquids.   4. Tanker characterized in that it is equipped   device according to any one of the preceding claims. cédentes.