JPS581113Y2 - large ocean float - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a large marine float used for offshore structures such as offshore airports and offshore work barges.

Conventionally, this kind of large ocean floating float, for example,
As disclosed in Japanese Patent No. 9-42156, a water sink (float) applied from below via a cone is provided to the legs from the plant platform.

However, this conventional water submerged body is a hollow body, and therefore, in order to have sufficient strength, the wall thickness must be increased, which means that the water submerged body must be made extremely large or small. If so, it will lead to a decrease in buoyancy.

Furthermore, since the legs are not fully fitted together when placed on the cone, there is a risk that the mounting portion may come off when the submerged body is shaken by waves or the like during use.

The purpose of this invention is to propose a large marine float that can be made as small as possible while still providing sufficient buoyancy and strength, and that can be easily replaced while maintaining a strong mounting position. be.

In order to achieve the above object, the present invention provides a buoyant body having an insertion hole on the upper surface that can be inserted and removed from below into a shaft body attached to the lower surface of an offshore structure, and this buoyant body is made of internally foamed material. , an outer skin part that covers the internal foam, a dividing member that divides the internal foam into a plurality of parts, and a cylindrical member whose upper part is open to form the insertion hole, and an outer surface of the cylindrical member. It consists of a plurality of radiating members connected in series.

According to this configuration, sufficient buoyancy can be expected due to internal foaming, and sufficient buoyancy can be expected due to the splitting material.
These things make it possible to make the whole thing as small as possible.

Furthermore, since the fitting hole is fitted into and removed from the shaft body, the fitting can be made strong, and replacement can be easily performed.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 6.

The large marine float 1 according to the present invention includes a buoyant body 5 having a fitting hole 4 on its upper surface that can be inserted into and removed from below a shaft 3 attached to the lower surface of an offshore structure 2.

The shaft body 3 is made of steel, and in the embodiment is vertically welded to the lower surface of the offshore structure 2, but it may be removable using a fixing device such as a bolt.

Further, although a solid body is shown in the embodiment, a hollow body may be used as long as it has sufficient strength.

The buoyant body 5 includes a foamed interior 6, an outer skin γ that covers the foamed interior 6, a cylindrical flange 8 attached to the upper surface of the outer skin 7, and a dividing member 9 that divides the foamed interior 6 into a plurality of parts. Consisting of

This dividing member 9 consists of a cylindrical member 10 whose top is open and a plurality of radiating members 11.

The fitting hole 4 is formed in the upper part of the cylindrical member 10 by attaching the partition member 12 to the middle of the cylindrical member 10 and making the inner diameters of the cylindrical member 10 and the cylindrical flange 8 equal.

Note that the portion below the partition member 12 of the cylindrical member 10 becomes the foamed interior 6.

This foamed interior 6 is intended to provide buoyancy, and is made of a foam material such as polystyrene or urethane, or a material with a light specific gravity such as cement foam.

The outer skin portion 7 is made of a resin outer layer 13 that is resistant to seawater such as polypropylene, a reinforced resin intermediate layer 14 that is resistant to corrosion and strength such as fiber reinforced resin or fiber reinforced resin mortar, butyl rubber,
It is formed with a rubber inner layer 15 made of tar such as naprene, urethane, or tar epoxy and has a high seawater sealing property.

The large marine float 1 having the above configuration is used by fitting the buoyancy body 5 from below onto the shaft body 3 attached to the offshore structure 2 through the insertion hole 4, and the foamed interior The buoyant force of 9 is transmitted to the offshore structure 2 via the dividing member 9 and the shaft body 3.

When the large marine buoy 1 is damaged and its buoyancy is reduced, the corresponding buoyant body 5 is moved downward against the buoyancy and removed, and a new buoyant body 5 is inserted. Good luck.

Note that the cylindrical flange 8J cylindrical member 10 forming the insertion hole 4
In order to prevent the partition member 12 and the shaft body 3 from being corroded by seawater, etc., consideration is given to the materials used and the coating of exposed surfaces.

Next, an embodiment in which the buoyancy body 5 is replaced using a repair ship will be described with reference to FIGS. 7 to 12.

As shown in FIGS. 7 and 8, the offshore structure 2 is supported from below by a large number of large ocean floats 1 arranged in a grid pattern.

The main body 16 of the repair ship is configured in a U-shape having a recess 17 in the center into which the large marine buoy 1 can be inserted.

A first ballast tank 18 is provided at the bottom of the main body 16, and stability during navigation is ensured by injecting ballast water into this tank and by its own weight.

A wheelhouse 19 is formed above the first ballast tank 18, and above it a pair of front and rear second ballast tanks 20 are formed with the recess 17 in between, and further above that a control room 21 is formed. .

Navigation of the main body 16 is performed by jet streams from a large number of nozzles 22 provided around the wheelhouse 19.

Air or seawater is used for the jet flow, and by adjusting the position of the jet nozzle 22, free navigation in all directions is possible.

In addition, there are many detection devices 2 near the water line on the outer periphery of the main body 16.
3 is arranged.

This detection device 23 uses ultrasonic waves, a proximity switch, etc., and detects when it approaches other ships, floating objects on the ocean, or the float 1 more than necessary, and the nozzle 220 operates.
Controls deactivation and thereby prevents collisions.

In this way, the jet flow from the nozzle 22 and the detection device 2
Although the main body 16 can sail freely without colliding with other objects by inspection according to 3 and proper steering, a propeller-type propulsion device may be separately attached in order to obtain high-speed navigation during normal navigation. .

The width L1 of the recess 17 described above is set to be larger than the diameter of the buoyant body 5, that is, )D, in order to allow the float 1 to fit therein, and the height of the recess 17 is set to be slightly larger than the diameter of the buoyant body 5, and the height of the recess 17 is slightly adjusted depending on the floating state of the main body 16. Even if there is a difference, it is sufficient to allow float 1 to fit in.

Furthermore, the width and length of the main body 16 are set so that it can freely navigate between the floats 1 arranged therein.

That is, the width L2 of the main body 16 and the length L3 from the inner surface of the recess to the front or rear surface are both set to be smaller than the pinch P between adjacent inner surfaces of the float 1.

A locking/disengaging device 24 for the float 1 located in the recess 17 is provided on the upper portion of the main body 16 .

This locking/disengaging device 24 is provided at the upper part of the upright part of the U-shaped main body 16, and is constructed by providing a pair of the same components at the front and rear, and the details thereof will be explained below based on FIGS. 9 to 12. .

The locking/disengaging device 24 includes a locking plate 27 disposed in a rectangular through hole 25 formed in the upper part of the main body 16 via an idling roller 26.
and a cylindrical ladder device (drive device) 28 that moves the locking plate 27 into and out of the upper part of the recess 17.
An inclined recess 29 into which a part of the cylindrical flange 8 is fitted is formed on the front surface of the cylindrical flange 7 .

Further, the lower surface of the locking plate 27 forms a locking surface 27a that can come into contact with the locked surface 5a, which is the upper surface of the buoyant body 5.

Next, the replacement work of the buoyancy body 5 will be explained.

Figure 7. As shown by the solid line in FIG. 8, the main body 16 that has been sailed near the offshore structure 20 is floated and sunk by pouring water into the ballast tank 18, 20, so that it can be navigated under the offshore structure 2. .

Then, by the jet flow from the nozzle 22 and the detection control by the detection device 23, the main body 16 is moved forward without colliding with the float 1, and as shown in the phantom line A in FIG. Place it on the side.

Next, the main body 16 is moved laterally and stopped with the float 1A positioned in the recess 17, as shown by the phantom lines in FIGS. 7 and 8.

At this time, the engagement/disengagement device 24 is in a non-operating (retracted) position.

In this state, first, the cylinder device 28 is extended, and the locking plate 27 is advanced to bring its inclined recess 29 into contact with the cylindrical flange 8.

At this time, the cylindrical flange 8 is shown in FIG. As shown in FIG. 10, it is in a state where it is held between a pair of locking plates 27.

Next, the second ballast tank 20 is injected and the main body 16 is lowered.

Then, the locking surface 27a of the locking plate 27 that descends together comes into contact with the locked surface 5a, and from then on, the buoyant body 5 is also lowered, and as shown in FIG. is extracted from the shaft body 3 and completely separated from the offshore structure 2.

After this, by horizontally moving the main body 16, it becomes imaginary line A in FIG.
Then, by moving forward (or backward), the offshore structure 2
Can be taken outside.

A new buoyant body 5 can be attached by carrying out the reverse operation to the above while the buoyant body 5 is supported by the main body 16 on the land side or another ship side.

Note that various shapes are conceivable for the shape of the buoyant body 5 and the shape of the fitting portion between the shaft body 3 and the fitting hole 4.

As described above, according to the present invention, sufficient buoyancy can be expected due to internal foaming, and sufficient buoyancy can be expected due to the dividing material, and by these factors, the whole can be made as small as possible.

In addition, if a buoyant body that is damaged or has lost its buoyancy can be removed by lowering it against its buoyancy, the shaft body can also be extracted and removed, and a new buoyancy body can be fitted and installed on the shaft body by the reverse action. I can do it.

In this way, the buoyant body can be easily replaced, and since the fitting hole fits into the shaft body, it can be mounted firmly.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a longitudinal sectional front view, and FIG. 3 is an A in FIG. 1.
-A sectional view, Figure 4 is the same B -B sectional view, Figure 5 is the same C
-C sectional view, Fig. 6 is an enlarged view of the main parts, Figs. 7 to 12 show -fl of the replacement work, Fig. 7 is a front view, Fig. 8 is a plan view, and Fig. 9 is A partially cutaway plan view of the main part, Fig. 10,
FIG. 11 is a partially cutaway front view of the same, and FIG. 12 is a side view of the same. 1.1A... Large ocean float, 2... Offshore structure, 3... Shaft body, 4... Fitting hole, 5...・Buoyant body, 5a...Locked surface,
6... Foaming inside, 7... Outer skin part, 8...
・・・・・・Cylindrical flange, 9・・・・・・Split material, 10
... Cylindrical member, 11 ... Radiation member, 1
6...Body, 17...Recess, 24...
...Latching and disengaging device, 27...Latching plate, 27a.
...Latching surface.

Claims (1)

[Scope of utility model registration request] A buoyancy body having an insertion hole on its upper surface that can be inserted into and removed from below a shaft body attached to the lower surface of an offshore structure is provided, and this buoyancy body is made up of an internal foam, an outer skin portion covering the internal foam, and the above-mentioned. Consists of a dividing material that divides internal foam into multiple parts,
Furthermore, the large marine float is characterized in that the dividing member is composed of a cylindrical member whose upper part is open to form the insertion hole, and a plurality of radiating members connected from the outer surface of the cylindrical member.