JPS61285191A - Mooring device for floating body - Google Patents

Abstract

PURPOSE:To secure sufficient mooring force and at the same time simplify detachment by engage-stopping a turntable connected to a front end of a mooring body of rigid structure and forming a joint part for both riser pipe and loading hose by means of detachable mooring cables through intermediate buoys. CONSTITUTION:One end of a mooring body 11 of rigid structure and attached to a moored hull is connected to a joint mechanism 12 connecting a loading hose 6 and a riser pipe 8 and concentrically arranged on a turntable 4. Intermedi ate buoys 13's are arranged in the middle of both a mooring cable 2 fastening the turntable 4 to an anchor 3 and the riser pipe 8, and the mooring cable 2 and the riser pipe 8 are detachably connected. Sufficient mooring force can be secured by employing the rigid-structured mooring body 11. And by interpos ing intermediate buoys 13's, their detachment operation can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION A [Object of the Invention] (1) Field of Industrial Application The present invention relates to improvements in mooring devices for floating bodies such as ships and floating marine structures.

(2) Prior art Figure 4 shows an example of a conventional CALM type single point mooring device.
It is moored to the e-bottom via an anchor 3. 5 is an oil storage nozzle, and a hoser 6 is installed at the top of buoy 1.
The vessel is tied to buoy 1 by the buoy, and is prevented from drifting by external forces such as waves, wind, and currents. The crude oil that has passed through the undersea pipeline 7 is guided from the riser pipe 8 to a loading hose 9 via a connection mechanism (not shown) in the buoy 1, and is loaded into the oil storage barge 5. In this case, the oil storage barge 5 is always moved by the turntable 4 on the buoy 1 so as to be located on the leeward side of the buoy 1, so that the oil storage barge 5 can easily leave and evacuate.

The conventional example shown in FIG. 5 is called a yoke-equipped CALM type, and the parts indicated by numbers 1 to 9 are the same as those in the example shown in FIG. 4 above. 1o is yoke and this is buoy 1
A member that connects the oil storage barge 5 and the oil storage barge 5 at a certain distance,
It also serves to guide the loading hose 9 from the buoy 1 to the oil storage barge 5. The yoke 10 and the buoy 1 are coupled via a turntable 4 so as to be rotatable only in a horizontal plane, allowing the oil storage barge 5 to swing around the buoy 1.

In the conventional CALM type single point mooring device shown in FIG.
However, when the wind direction suddenly changes, compressive force cannot be expected in the direction in which the oil storage barge 5 approaches the buoy 1, and the oil storage barge 5 and buoy 1 There is a risk of a collision.

On the other hand, with the CA LM type single point mooring device with a yoke shown in FIG. A yoke that is strong enough to withstand the force of waves acting on the yoke has the disadvantage that it is heavy and requires the buoy 1 to be larger.

(3) Problems to be Solved by the Invention The problem to be solved by the invention is to eliminate the drawbacks of the above-mentioned conventional examples.

[Structure of the Invention] (1) Means for Solving the Problems The present invention was proposed in order to eliminate the drawbacks of the above-mentioned conventional examples. a turntable having a mechanism for connecting the tip of a mooring structural member of the structure to a riser pipe rotatably continuous in a horizontal plane and a loading hose; a mooring cable connecting the turntable and a submarine anchor; A means for solving the problem is a structure of a floating body mooring device characterized by comprising the mooring cable and an intermediate floating body provided in the middle of the riser pipe and equipped with an attachment/detachment mechanism.

(2) Effects The present invention has the above-mentioned configuration as its gist, and exhibits special effects as will be described in detail in the description of the embodiments below.

(3) Examples Hereinafter, the present invention will be specifically explained using examples shown in FIGS. 1 to 3. In Figure 1, 2 is a mooring chain, 3 is an anchor, 4 is a turntable, 5 is an oil storage barge, 6 is a hoser, 7 is a submarine pipeline, 8 is a riser pipe, and 9 is a loading hose, and the structure of these components 1. The functions and mutual relationships are almost the same as those of the conventional example described above, except for the turntable 4, riser pipe 8, and loading hose 9. (Equivalent parts are given the same reference numerals.) 11 is a mooring structural member, one end of which is attached to the tip of the shaft of the oil storage barge 5, and the other end connecting the loading hose 9 and riser pipe 8. connected to a connecting mechanism 12 that connects the
The connecting mechanism 12 is arranged concentrically on the turntable 4. The loading hose 9 is installed within the mooring structural member ll and is connected to the riser pipe 8 via a connection mechanism provided within the turntable 4. Reference numeral 13 corresponds to the buoy of the above-mentioned conventional example.
An intermediate floating body (buoy) is provided in the middle of the intermediate floating body 13 (buoy), and an attachment/detachment mechanism 14 for the mooring cheno 2 or riser pipe 8 is provided on the upper part of the intermediate floating body 13 (buoy). Used when barges need to be moved. As the connection mechanism 12, for example, the second
A swivel joint as shown in the figure can be used. This prevents the riser pipe 8 from twisting even when the loading hose 9 rotates in a horizontal plane as the oil storage barge oscillates, and allows stable delivery of crude oil at all times. . An example of the connection mechanism 12 will be outlined with reference to FIG. This swivel joint basically consists of a fixed part 15 and a movable part 16. The fixed part 15 has a conduit 17 that guides the crude oil received from the upper end of the riser pipe 8 to the delivery place with the movable part 16. A groove 19 is cut so that even if the entire movable part 16 rotates in a horizontal plane, it can always receive the crude oil that has passed through the conduit 17 and guide it to the loading hose 9. A seal 20 is provided at the area where the fixed part 15 and the movable part 16 rub together.

FIG. 3 shows an example of the attachment/detachment mechanism 14 between the moored cheno 2 and the intermediate floating body 13 (buoy). That is, a floating body side attachment/detachment fitting 23 having an insertion port is fixed to the upper part of the intermediate floating body 13, while a chain side attachment/detachment fitting 23 having an insertion port is provided on the mooring chain 2, and both attachment/detachment fittings 1.22 A bolt 21 is used to attach and detach the .23.

One embodiment of the device of the present invention is constructed as described above, and there is a connection mechanism [2] between the turntable 4 and the oil storage barge.
Since the rigid mooring structural member 11 is provided through the
3) Even if a force acts in the direction approaching the side, it is regulated by the mooring structural member 11 and the oil storage barge 5 or intermediate floating body 1
There is no possibility of colliding with 3 (buoy).

Moreover, the oil storage barge 5 can be easily separated from the buoy.

That is, by attaching and detaching the upper mooring chain and the upper riser pipe via the attaching and detaching mechanism 14 of the intermediate floating body 13,
The oil storage barge 5 includes a turntable 4, a loading hose 9,
It can be easily detached and evacuated together with the mooring structural members. Furthermore, since the turntable 4, the connection mechanism 12, and the mooring structural member 11 are supported by the oil storage barge, the intermediate floating body 13 may be small and light, and therefore the buoy (intermediate floating body 13) can be made small and lightweight. .

C [Effects of the Invention] Since the device of the present invention has the above-mentioned configuration and operation, the present invention has the practical effect of realizing a floating body mooring device that eliminates the drawbacks of the above-mentioned conventional example. can be mentioned.

[Brief explanation of drawings]

FIGS. 1 to 3 are schematic diagrams of an embodiment of the present invention, and FIGS. 4 and 5 are illustrations of the overall configuration of a conventional example, respectively. 2: Mooring Cheno, 3: Anchor 4: Turntable, 5: Oil storage barge (floating body) 6: Hoser, 7: Subsea pipeline 8: Riser pipe,
9: Loading hose 11: Mooring structural member 1
2: Connection mechanism 13: Intermediate floating body (buoy L) 4: Attachment/detachment mechanism. (2 people outside) Figure 2

Claims (1)

[Claims] A turntable equipped with a mechanism for connecting the tip of a rigid mooring structural member protruding toward the sea from a floating body to be moored, and a riser pipe and a loading hose that are rotatably continuous in a horizontal plane. , a floating body mooring device comprising: a mooring cable connecting the turntable and the submarine anchor; and an intermediate floating body provided midway between the mooring cable and the riser pipe and equipped with an attachment/detachment mechanism.