JPS58202185A - Buoy device for cargo work - Google Patents

Abstract

PURPOSE:To simply perform exact mooring operation of a buoy by a method in which the main yoke whose basal end is pivotally attached to the hull and fitted with a buoyancy tank is connected in freely attaching or detaching manner through a coupling to a sub-yoke connected in a trunable and pivotally attachable manner to the float. CONSTITUTION:A cargo work buoy 1 to be moored by an anchor chain 4 is provided, and the main yoke 2 for mooring, fitted with a float 5 through a supporter 6, whose basal end is pivotally attached to the ship 3 in a rising and falling manner, is provided for mooring the buoy 1 to the hull 3, etc. Also, a sub-yoke 2a for mooring, whose basal end is pivotally attached 8 in turnable manner, is provided to the buoy 1. Both the yokes 2 and 2a are connected with each other in detchable manner through a coupling mechanism 7. Thus, the attaching and detaching operations of the yokes can be easily attained and the mooring operation can also be attained quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cargo handling buoy device, and in particular, the present invention relates to a cargo handling buoy device that is installed on the buoy and is used for cargo handling between offshore structures such as ships or offshore work platforms moored to the buoy and land tank equipment. This can now be done through a cargo handling pipe. Regarding a cargo handling buoy device.

An example of a conventional cargo handling buoy device is the CALM (Catenary Anchor L) shown in Figure 1.
egMooring) type, which is equipped with a cylindrical buoy a for mooring and cargo handling, and this buoy a has a plurality of watertight compartments formed therein.

By locking one end of the anchor chain C to the chain stopper housing of the fender skirt b provided at the local bottom of the buoy a, the buoy a is moored in a predetermined sea area.

In the moored state with the mooring line to buoy a, a buoy lower hose d extending from the tank equipment on land to buoy a4,
Loading or unloading of fluids such as crude oil is carried out between a floating hose f extending from a moored vessel e, etc., and between tank equipment and the vessel e.

The floating hose f is connected to the cargo manifold of the vessel e, and the means for connecting the lower buoy hose d and the floating hose f is a central swivel unit, piping connected to its lower end, and a turntable. The central swivel unit is connected to the upper end of the central swivel unit.

Further, the turntable g is rotatably mounted on the upper part of the buoy a via a roller bearing, and the piping connected to the floating hose f is rotatable around the central swivel. In other words, the vessel e that is laid up is.

Even if the buoy is affected by wind or tidal currents, cargo handling can continue while rotating around buoy a.

However, such conventional cargo handling buoy devices have the following drawbacks or problems.

(11) Since mooring lines are used as a means of mooring offshore structures, there is a risk that the offshore structure will approach the buoy and collide with it.

, 1 (2) As the offshore structure rotates around the buoy, there is a risk that the floating hose may bend, and since the floating hose contains crude oil, etc., there is always a risk of leakage of crude oil, etc.

(3) When installing such a cargo handling buoy device in a frozen sea area, there is a drawback that external mooring force becomes large, and floating hose e cannot be used.

(4) When ice conditions exceed the design ice thickness.

It is necessary to quickly separate marine structures from buoys, but conventional equipment takes a lot of time to do so.

In addition, a yoke i with a buoyancy tank h as shown in Figure 2 has been developed, but even with this method, there is a problem in that it takes a lot of time to quickly detach an offshore structure from a buoy. There are 0 points.The present invention aims to solve these problems.
While mooring offshore structures to buoys can be done safely at all times, the moorings can be released efficiently and quickly in emergencies. It is an object of the present invention to provide a cargo handling buoy device. Therefore, the cargo handling buoy device of the present invention includes a cargo handling buoy moored by an anchor chain, and also has a cargo handling buoy device moored to the cargo handling buoy by an anchor chain. The main yoke and the auxiliary yoke are provided with a mooring main yoke whose base end is pivotally connected to the marine structure and can be raised and lowered, and a mooring auxiliary yoke whose base end is pivotally connected to the buoy and can be rotated and raised and lowered. a buoyancy tank is attached to the underside of at least one of the
The present invention is characterized in that a coupling mechanism is provided for removably connecting the tips of the main yoke and the auxiliary yoke to each other.

Below, a cargo handling buoy device as an embodiment of the present invention will be explained with reference to the drawings. Fig. 3 is an elevation view thereof, and Fig. 4 -
6 are explanatory diagrams showing the process of attaching and detaching the coupling mechanism.

As shown in Fig. 3, a cargo handling buoy 1 is moored by a plurality of anchor chains 4, one end of which is anchored to a submarine base by an anchor, and a barge 3 as an offshore structure is moored to this buoy 1. To enable this, the purge 3 is provided with a mooring main yoke 2 which is pivotally connected at its base end with a binge joint 8 and can be raised or lowered. A buoyancy tank 5 is attached to the lower side of the main yoke 2 by a support member 6.

Further, the buoy 1 is provided with an auxiliary yoke 2a whose base end is pivotally connected by a pin joint 8 and can be rotated and raised and lowered.

Further, a coupling mechanism 7 is provided to connect the tips of the yokes 2, 2a to each other, so that the yokes 2, 2a can be removably connected to each other.

This coupling mechanism 7, as shown in FIGS. 4 to 6,
Binding hook 10. Hydraulic cylinder 11° flange 12.
It is composed of a protrusion 13 and a recess 14, and can be engaged and disengaged by aligning the central axes of the yokes 2, 2a in the longitudinal direction.

Incidentally, at the same time as this engagement and disengagement, the pipes 9 on each yoke 2 and 2a are engaged and disengaged by a joint (not shown).

The coupling mechanism 7 is engaged and disengaged by operating the hydraulic cylinder 11 to open and close the coupling hook 10i.

That is, when connecting the auxiliary yoke 2a of the buoy 1 and the main yoke 2 on the purge 3 side, as shown in FIG. As a result, the coupling hook 10 provided at the tip of the main yoke 2 is opened in the direction shown by arrow A in FIG. At this time, the auxiliary yoke 2a is attached in advance to the top of the buoy 1 at a constant angle of elevation and inclination toward the main yoke 2.

The tips of the yokes 2, 2a are positioned opposite to each other.

1. The main yoke 2 is guided to the auxiliary yoke 2a along a guide (not shown), and this guide allows the protrusion 13 at the tip of the auxiliary yoke 2a to connect to the main yoke 2.
and the recess 14 at the tip thereof fit into each other.

After this fitting, the coupling hook lO is attached to the hydraulic cylinder 11.
The extension of the yoke grips the flange 12 of the auxiliary yoke 2a, thereby connecting the tips of the yokes 2.degree. 2a to each other. At the same time, the pipe 9 is also connected by a joint (not shown).

The coupling mechanism 7 can be opened by reversing the above-described connection procedure.

When carrying out cargo handling work in this way, first purge 3
Crude oil or the like can be supplied from onshore tank equipment to an oil storage tank (not shown) in the tank via a hose 15't'' under the buoy, stored in the oil storage tank, and then loaded onto a tanker.

In addition to purges, offshore structures may also be ships and oil production platforms.

As detailed above, the cargo handling buoy device of the present invention has the following advantages and effects.

(Since the yoke is easy to attach and detach, it was difficult to handle with conventional cargo handling buoy devices.Emergency detachment of marine structures can be performed quickly.

(2) Because the buoyancy tank is attached to the yoke.

Even in relatively rough sea conditions, the movement of the marine structure in the waves is relaxed, and the S-floating structure can be moored to a buoy quickly and safely.

[Brief explanation of drawings]

Figures 1 and 2 show conventional cargo handling buoy equipment.
The figure is a perspective view of the device, FIG. 2 is a perspective view showing another example, FIGS. 3 to 6 show a cargo handling buoy device as an embodiment of the present invention, and FIG. Front view, 4th
6 to 6 are explanatory diagrams showing the process of attaching and detaching the coupling mechanism. 1. Buoy for cargo handling, 2. Main yoke for mooring. 2a... Auxiliary yoke for mooring, 3... Purge as a marine structure, 4... Anchor chain, 5 Floating tank, 6...
・Support member, 7. Coupling mechanism 8. Spring pin joint, 9. Pipe, 10. Hook, 11. Hydraulic cylinder. 12.Flange, 13@.Protrusion, 14.Concave portion, 1
5. Buoy lower hose. Sub-agent Patent Attorney Yoshihiko Ion

Claims (1)

[Claims] It is equipped with a cargo handling buoy moored by an anchor chain, and in order to moor an offshore structure to the buoy, a main mooring yoke is pivotally attached to the offshore structure and can be undulated; a mooring auxiliary yoke which is pivotally connected to the mooring yoke and can swing and raise and lower; a buoyancy tank is attached to the lower side of at least one of the main yoke and the auxiliary yoke; A coupling mechanism is provided for removably connecting the two to each other. Buoy equipment for cargo handling.