JPH0241116Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combination mooring device.

Recently, with oil resource exploration activities extending into deep sea areas, the superiority of combination mooring devices as a means of mooring offshore structures has been highlighted.

This type of mooring device is used by connecting a chain and a wire rope via a connection link, but with conventional mooring devices, it is necessary to install a special pulley inside the chain rocker, making it difficult to install the pulley. In fact, there are problems such as reinforcement inside the column, securing space, and even inconvenience of maintenance.
When storing the mooring line, it is difficult to fit the connection link and chain neatly into the pocket of the chain drum, and the chain drum requires a specially shaped tooth profile to pass the connection link through, making it large and costly. disadvantageous to

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide a combination mooring device that is easy to operate, safe to work with, and inexpensive.

To this end, the present invention is a combination mooring in which a combination chain is constructed by removably connecting a wire rope to an anchor chain via a connection link, and the combination chain is stored and fed out via an anchor winch and an anchor windlass. In the device, a turning sheave is installed protruding on the deck and allows the combination chain to pass through, and a wire rope, etc. of the combination chain installed on the deck and wound around the turning sheave is wound. An anchor winch, a vertical anchor windlass provided on a deck between the turning sheave and the anchor winch, a chain stopper provided on the deck between the turning sheave and the anchor windlass, and the turning sheave. The present invention is characterized by comprising a chain rocker recessed in the deck between the sheave and the anchor winch.

An embodiment of the present invention will be explained with reference to the drawings.
Figure 1 is a perspective view of the same, Figures 2, 3, and 4 are longitudinal cross-sectional views of Figure 1, Figure 2 shows the connection link below the air leader, and Figure 3 shows the connection link in the lower part of the air leader. FIG. 4 shows the state between the anchor windlass and the chain stopper, with the connection link removed and the chain stored in the chain locker via the lead chain.

In the above figure, 1 is a wire rope 7 installed on a deck 11 of a floating structure moored on the water surface.
Anchor winch for winding and unwinding, 2
3 is a vertical anchor windlass installed on the deck 11 for winding and unwinding the chain, and 3 is installed at the upper end of the column 10 protruding from the end of the deck to allow passage of the chain, wire rope, and connection link. Turn sheave, 4 is column 1
A fair lead is pivotally mounted on the side wall of 0 via a bracket 12 and allows passage of a chain, a wire rope, and a connection link; 5 is a chain stopper provided near the anchor winch 1 of the turning sheave 3; 6 is a chain; and 7 is a a wire rope, 8, is connected to the free end of the wire rope 7;
A connection link for connecting the wire rope 7 to the chain, 9 a chain rocker opening on the deck 11, 13 and 14 the shafts of the fair leader 4 and the turning sheave 3, respectively, and 15 wound around the windlass 2. This is a lead chain attached to the upper end of the chain.

Here, the chain stopper 5 is provided between the anchor windlass 2 and the turning sheave 3, and the chain drum of the anchor windlass 2 stops the chain 6 when the anchor winch 1 winds the wire rope 7 through the turning sheave 3. It is installed in a position that does not interfere with winding.

In such a device, when first storing the mooring line, the wire rope 7 is wound in the drum of the anchor winch 1 in the state shown in FIG. The link 8 is located between the anchor windlass 2 and the chain stop 5.

If this is done, the anchor winch 1 is stopped, the chain stopper 5 is activated, and the load of the chain 6 is temporarily held by the chain stopper 5.
In this state, connect link 8 from chain 6.
, and the lead chain 15, which had been previously wound around the chain drum of the windlass 2, is connected to the chain 6.

Next, release chain stopper 5, and this time,
As shown in FIG. 4, by rotating the chain drum of the anchor windlass 2, the chain 6 is stored in the chain locker 9.

At this time, the chain drum of the anchor windlass 2 is placed at an appropriate position between the turning sheave 3 and the anchor winch 1, and since the anchor windlass 2 is vertical and can have a sufficient chain wrap angle, The chain 6 is smoothly and lightly stored in the chain rocker 9 by using the anchor windlass 2 without applying an unreasonable load to the turning sheave 3.

Next, when pulling out the mooring line, the chain 6 is pulled out from the chain rocker 9 using the anchor windlass 2, and the connecting part is located between the chain stopper 5 and the chain drum of the windlass 2, as shown in FIG. When the anchor windlass 2 is pulled out, the anchor windlass 2 is stopped and the chain stopper 5 is pulled out.
is activated, and the load is temporarily held at the chain stopper 5.

In this state, the chain 6 is slightly let out by the anchor windlass 2, thereby loosening the lead chain 15, removing the connecting link, and separating the lead chain 15 from the chain 6.

After the lead chain 15 has been separated, connect the chain 6 and the wire rope 7 with a connection link 8 provided at the end of the wire rope 7 wound around the drum of the anchor winch 1, and then tighten the chain stopper 4. After removing it, the second
As shown in the figure, a wire rope 7 is unwound by an anchor winch 1.

According to such a device, the following effects can be achieved.

(1) Winding in and unwinding of the chain and wire rope are carried out using a dedicated anchor windlass and anchor winch, so operations are reliable and operation is easy.

(2) The work is safe because the connection link can be fitted and removed on the deck.

(3) All equipment and mooring lines are visible, reducing operator anxiety during operation.

(4) Since the chain drum of the anchor windlass can use a normal tooth type, it is advantageous in terms of cost.

Since the chain can be neatly stored in the chain locker, it is safe because it will not sway unstably and hit other objects when the deck is shaken.

In short, according to the present invention, a combination mooring is provided in which a combination chain formed by removably connecting wire ropes via an anchor chain connection link is stored and paid out via an anchor winch and an anchor windlass. In the device, a turning sheave is protruded on the deck and allows the combination chain to pass through, and a wire rope section of the combination chain provided on the deck and wound around the turning sheave is wound. An anchor winch, a vertical anchor windlass provided on a deck between the turning sheave and the anchor winch, a chain stopper provided on the deck between the turning sheave and the anchor windlass, and the turning sheave. By providing a chain rocker recessed in the deck between the sheave and the anchor winch, a combination mooring device that is safe, inexpensive, and easy to operate is obtained, so the present invention is extremely useful industrially. It is.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure shows the connection link below the air leader, Figure 3 shows the connection link between the anchor windlass and chain stopper, and Figure 4 shows the connection link being removed and the connection link being moved through the lead chain. FIG. 3 is a vertical sectional view showing a state in which the chain is stored in a chain locker. 1... Anchor winch, 2... Anchor windlass, 3... Turning sheave, 4... Fair leader, 5... Chain stopper, 6... Chain,
7... Wire rope, 8... Connection link, 9... Chain rocker, 10... Column,
11... Detsuki, 12... Bracket, 13...
Axis, 14...Axis, 15...Lead chain.

Claims (1)

[Scope of utility model registration request] In a combination mooring device, a combination chain, which is made by removably connecting a wire rope to an anchor chain via a connection link, is stored and paid out via an anchor winch and an anchor windlass. A turning sheave that projects and allows passage of the combination chain that is hung around, an anchor winch that is installed on the deck and winds the combination chain that is hung around the turning sheave, and the turning sheave and the anchor. A vertical anchor windlass provided on a deck between the winch, a chain stopper provided on the deck between the turning sheave and the anchor windlass, and a chain stopper provided on the deck between the turning sheave and the anchor winch. A combination mooring device characterized by comprising a chain locker recessed in a deck.