JPS61241291A - One point mooring device - Google Patents

Abstract

PURPOSE:To eliminate the effect of up and down sway of a mooring vessel upon a buoy and simplify the whole structure, by linking the mooring vessel through a connecting rod swaying up and down freely, which is fixed to a float installed through an arm to the periphery of a turntable of a one point mooring buoy. CONSTITUTION:At a turntable 3 of the upper side of a one point mooring buoy 1, which is fixed by a mooring line 2 linked at the sea bed, a float 7 is installed through an arm 10. To the float 7, a connection rod 4 is connected swaying up and down freely, and the other end of the connection rod 4 is linked to a mooring vessel 6. The mooring power owing to waves and tidal currents is delivered through the connection rod 4, the float 7, the turntable 3, the buoy 1, and the mooring line 2 to the sea bed, and the up and down sway is absorbed by a hinge between the float 7 and the connection rod 4. Therefore, the up and down sway is not exerted to the buoy 1, the load imposed to the bearing of the turntable is reduced, and the whole structure can be simplified.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a single point mooring device.

[Conventional technology]

Conventional single point mooring devices include the types shown in FIGS. 7 and 8. Buoy 1 is connected to the seabed by multiple moorings 2. A turntable 3 is installed on the buoy I, and has a mechanism that rotates around the vertical axis of the buoy I. One side of the connecting rod 4 is connected to the turntable 3, and the other side is connected to the moored floating body 6 via a plurality of moored floating body side hinges 5. A single-point mooring device configured with such a system connects the mooring force of the moored floating body 6, which is subject to wind, waves, and currents, while moving around the buoy 1.4. Turntable 3. through each of the buoys 1 and finally the mooring line 2.
transmitted to the ocean floor by

Generally, a central swivel unit (not shown) is installed on the buoy 1 and the turntable 3, and jumper hoses are used to connect the sea level oil pipe under the buoy to the buoy, and between the buoy and the moored floating body 6, so that oil is sent into the moored floating body. It is used in a similar manner.

[Problem that the invention seeks to solve]

However, such conventional single point mooring devices with connecting rods have the following problems.

(1) The buoy tilted due to changes in the moored floating body.

Excessive force acts on the bearings that make up the turntable.

(2) Since the buoy alone supports approximately 50% of the weight of the connecting vessel, the buoy becomes larger.

(3) The work of attaching and detaching the buoy and the connecting pipe becomes complicated.

The present invention aims to solve these problems by installing a buoyant body on the connecting rod to keep the buoy horizontal at all times and reduce the weight of the buoy.

Another object of the present invention is to provide a one-point mooring device that allows easy attachment and detachment of a buoy and a connecting rod.

[Failure to solve the problem]

For this reason, (1) the one-point mooring device of the present invention includes a buoyant body that is detachably installed on the outer circumference of the turntable of the buoy and has sufficient buoyancy to land on the outer circumference of the buoy and support the connecting pipe; It is characterized by being equipped with a connecting pin that connects the moored floating bodies so that they can swing up and down.

[Effect]

With the above-mentioned configuration, the inclination of the connecting can due to changes in water intake of the moored floating body is absorbed between the moored floating body and the buoyant body, and this buoyant body eliminates the need for support equipment before and after the connecting can be separated.

〔Example〕

A single point mooring device as an embodiment of the present invention will be explained below with reference to the drawings. FIG. 1 shows an elevational view of the mooring device equipped with this connecting pin, and FIG. 2 shows a plan view.

As shown in Figure 1.2, one mooring device is connected to a buoy 1, which can be easily attached to and detached from a plurality of mooring lines 2 anchored to the seabed and a turntable 3 installed on the buoy 1. , and fixedly coupled buoyancy body 7. It is constituted by a connecting rod 4, one side of which is connected to a buoyant body side hinge 8 installed on the buoyant body, and the other side connected to a moored floating body side hinge 5.

4. The mooring force of a moored floating body due to wind, waves, and currents is connected. Buoyant body7. Turntable 3. It is transmitted to the seabed by a mooring line 2 via a buoy 1.

The up and down movement of the moored floating body 6 is performed by the connecting gun 4 and the front and rear hinges 8,
It is absorbed by the rotation of 5.

Furthermore, the connecting rod 4 is supported by the buoyant body 7 before and after the buoy 1 and the moored floating body 6 are connected and separated.

This buoyant body 7 has sufficient buoyancy to support not only its own weight but also the weight of the connecting rod 4.

9.10 is a rigid connecting arm provided integrally with the turntable 3 and the buoyant body 7, and 11 is a connecting arm 9.1.
Detachable coupling devices provided at four positions on the mutually opposing side surfaces of 0; 12 are the opposing side surfaces 2 of the connecting arms 9 and 10;
13 is a central swivel on the buoy 1; L14 is a hose under the buoy connected to the fixed pipe on the buoy side of the central swivel 13; 15 is a swivel pipe of the central swivel 13 and the top of the arm 9. stand 1
17 is a fixed pipe arranged between the fixed pipe 15 and the moored floating body 6
This is a jumper hose that connects to the manifold (not shown) above.

FIG. 3 and FIG. 4 show an example of the above-mentioned detachable coupling device 11 and detachable axial force transmission device 1201.

FIG. 3 shows an attachment/detachment device configured in a rack-interlocking manner, where 18 is a fixed rack fixed in a groove 19 on the outer surface of the turntable arm 9, and 20 is a fixed rack fixed in a recess 21 on the inner surface of the arm 10 on the buoyant body 7 side. This is a movable rack 2° which is slidably mounted in the direction of an arrow 22 and moved forward and backward by a screw jack 23 on an arm 10 to be engaged with a fixed rack 18.

Figure 4 shows an axial force transmission device configured with a pin insertion type.
．． The screw jack 26 on the arm 10 is inserted into and removed from the pin holes 24 and 25 provided in opposing predetermined positions of the arms 9 and 10 in alignment with each other in a direction orthogonal to the axis of the arm 10 in the direction of the arrow 27. A movable bin 28 is provided.

Furthermore, any other means may be used for the detachable coupling device 11 and the detachable axial force transmission device 12, and the coupling of the arm 9.10 is as follows.
With the arms 9 and 10 facing each other in the state shown in Figure 2,
Figures 5 and 6 show a second embodiment of the present invention.

In the figure, 30.30 indicates the bearings arranged front and back on the buoyant body 7, and 31 indicates the bearing 30.
, 30, a trunnion shaft is swingably supported by a longitudinal shaft 32.

Reference numeral 33 denotes a pair of bearings at the tip of the connecting pin 4 that supports both ends of the trunnion shaft 31, and the other parts are shown in FIGS. 1 to 4.
It should be similar to the figure.

According to this embodiment, the vertical movement of the moored floating body 6 is absorbed by the trunnion shaft 31 and the moored floating body side hinge 5, and furthermore, the horizontal vibration of the moored floating body 6 is absorbed by the sway of the trunnion shaft 31 by the longitudinal axis 32 of the universal joint 29. Since the buoy is absorbed dynamically, it has the effect of further reducing the influence of external forces on the buoy i, especially the force applied to the bearings.

〔Effect of the invention〕

As described in detail above, since the one-point mooring device of the present invention has a buoyant body in the connecting rod, the following effects can be obtained.

(1) Compared to the conventional type, by installing a buoyant body on the connecting rod, the up-and-down motion of the moored floating body during waves does not act on the buoy, so the force applied to the turntable bearing is reduced.

(2) Since the weight of the connecting vessel is not applied to the buoy, the buoy can be made smaller.

(3) Since it is supported by the buoyant body of the connecting vessel, it is easy to attach and detach the buoy and the moored floating body.

[Brief explanation of drawings]

1 and 2 are an overall front view and a plan view showing a first embodiment of a single point mooring device according to the present invention, and FIG. 3 is a
-■ sectional view, FIG. 4 is a sectional view of The figures are a front view and a plan view showing a conventional device. 1...buoy, 2...mooring line, 3...turntable. 4...Connection pin, 5...Mooring floating body side hinge, 6...
- Mooring floating body, 7... Buoyant body, 8.29... Buoyant body side bin join), 9.10... Connection arm. 3rd country selection 4sen 4' 85sen Otsukasu ku 87 figure Otsu 8th

Claims (1)

[Claims] A buoyancy body that is removably attached to the outer circumference of the buoy's turntable and has sufficient buoyancy to land on the outer circumference of the buoy and support the connecting pipe, and this buoyancy body and the moored floating body are connected to each other so as to be able to swing up and down. A single point mooring device characterized in that it is equipped with a connecting hole.