JPS6331896A - Lifting device for submarine body - Google Patents

Abstract

PURPOSE:To prevent a submarine body from interfering with a submarine obstruction by providing a buoyancy body for the center of rotation between the tip weight of a lifting lanyard dropped near a submarine body and a rope with anchors having plural floating bodies connected with the lifting lanyard through the middle weight of said lanyard. CONSTITUTION:A flexible rope 5 with anchors to which four palm anchors 3 and buoyancy buoys 4 to make compensation for the dead weight of the rope are joined at proper intervals is connected to the tip of a lifting lanyard 1. A weight 2 is attached on a point A, and the tip weight 8 of the lifting lanyard 1 is joined to the tip of said lanyard 1 through a swivel 6, a buoyancy body 7 for the center of rotation and a lanyard 9. In lifting a submarine body 13 joined to a buoy 11 through a lanyard 12, when the tip weight 8 is lowered near the submarine body 13 from a ship 14, and the lifting lanyard 1 is also veered, said buoyancy body 7 is positioned over the tip weight 8 with the lanyard 9 keeping vertical, but the rope 5 with the anchors is horizontally held as long as the rope 10 of a middle weight 2 in the sea, and is therefore wound around a buoy lanyard 12 by the turning of the ship 14, and then the submarine body 13 is lifted. Thus the submarine body 13 can be prevented from interfering with a submarine obstruction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lifting and recovery device for recovering a heavy object on the seabed or a sunken submersible.

[Conventional technology]

Conventionally, as a device for lifting and retrieving objects on the seabed from the sea surface, (1) trawl nets (2) buoy cables connected to objects on the seabed that are longer than the sea depth,
The buoy was raised above the sea surface and, using the buoy cable as a guide, was used to retrieve the buoy using a retrieval line that lowered the retrieval line from above the sea surface to the seabed.

[Problem that the invention seeks to solve]

However, conventional underwater object lifting and recovery equipment.

(1) The seabed is flat and the seabed soil is muddy or sandy. (2) The buoy cable is longer than the sea depth. There was a drawback.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide an apparatus for lifting and retrieving seabed objects, which retrieves seabed objects using a cable having an improved tip.

[Means for solving problems]

For this reason, the undersea object lifting and recovery apparatus of the present invention is as follows.

An undersea object is connected to a buoy floating in the sea via a buoy cable, one end of which is connected to a ship at sea.

The other end is placed on the seabed near the seabed by a device that lifts and retrieves it by a hoisting cable connected to an anchored rope that wraps around the buoy cable as the vessel turns. The tip weight of the hoisting and retrieving cable, the swing center buoyant body disposed near the tip weight via the rope, and the anchored rope to which a plurality of floating bodies are attached onto the swing center buoyant body. The present invention is characterized in that it is equipped with a hoisting and retrieval line υ as a cable intermediate weight that rotates near the seabed following the turning of the vessel.

[For production]

According to the above configuration, when a ship turns on the sea surface, the anchored rope on the seabed turns around the turning center buoyant body and wraps around the buoy cable connecting the buoy and the seabed object on the nearby seabed. , enabling the recovery of seabed objects.

〔Example〕

Figures 1 to 3 (1), (2), (3) and (4)
2 is an embodiment of the apparatus for lifting and retrieving seabed objects according to the present invention.

Fig. 1 is an overall view showing the lifting and retrieval line of the present invention, Fig. 2 is an overall view showing the buoy and buoy cable installed on a seabed object, and Fig. 3 (1,), (2), (3). , (4) are two action diagrams showing the action of the present invention.

In FIG. 1, a flexible anchored rope 5, in which four-pronged anchors 3 are connected at appropriate intervals, is connected to the tip of the hoisting line 1.

For this rope 5.

A buoyancy buoy 4 that compensates for the weight of the anchor and rope is connected to the claw anchor 3 via a rope 5, so that the overall weight is such that it floats slightly in the water.0 Connection of the anchored rope 5 and the lifting and retrieval line 1 A weight 2 connected with a wire 10 of an appropriate length is attached to point A. The shape of the weight 2 is, for example, a spherical shape that is difficult to get caught even when dragged on the seabed. A weight 8 connected to a floating body 7 and a wire 9 via a swivel 6 is provided at the tip of the anchored rope 5. still.

The wire lengths of wire 9 and wire 10 are approximately the same.

On the other hand, a buoy 11 is erected on the sea bottom installation object 13 shown in FIG. 2, and a buoy cable 12 is extended. The length of the buoy cable 12 is approximately twice the length of the wire 9. The size of the buoy 11 is determined by a buoyant body that has enough pressure to apply appropriate tension to the buoy rope 12.

Figure 3 shows the effects of these devices.

In FIGS. 3(a), (b), (C), and (d), the lifting element weight 8 of the lifting line 1 is moved as close to the seabed object B as possible from the ship 14 on the sea surface using a binger or the like. By lowering it (distance (r)), the length of the anchored rope 5 can be reduced accordingly. After the weight 8 at the tip of the hoisting line reaches the seabed, the hoisting line is further fed out, and if necessary, the position of the vessel 14 is moved in the downstream direction of the tidal current to achieve the state shown in Figure 3 (2), that is, anchored. The rope 5 can be stretched near the seabed. At this time, the weight 2 is held in position to the extent that it does not touch the seabed.

Thereafter, as shown in FIG. 3 (3), the ship 14 turns in a circle with radius ■ being the length of the anchored rope 5, so that the anchored rope 5 is moved near the seabed with the buoyant body 7 as the center. In other words, weight 2 draws a circle.

Therefore, the buoy can be hooked onto the buoy cable 12 extended from the seabed installation object 13 within this circle (Fig. 3 (4)
)reference). If the anchored rope 5 and the buoy line 12 are caught, the seabed object 13 can be recovered by hoisting the recovery line 1 with the ship 14.

Furthermore, in order to facilitate this method, it is also possible to constantly monitor the tension of the hoisting and retrieval line 1 and to carry out the procedure while grasping the status of each of the above steps.

2. In carrying out the present invention, the sea depth H""6000
m, the length L of the hoisting and retrieval line 5 = 400 m, the distance r between the seabed object 13 and the floating body 7 = 200m, and the distance h between the seabed object 13 and the buoy 11 = 50m.

The turning radius R of the ship 14 is assumed to be 400 m.

〔Effect of the invention〕

As described above in detail, there are two subsea object lifting and recovery apparatuses of the present invention.

(1) It is possible to prevent the seabed scanning rope from getting caught on obstacles on the seabed. (2) The length of the buoy cable installed on the side of the seabed object can be short, so the size of the buoy can be reduced. effective.

[Brief explanation of drawings]

Figures 1 to 3 (IL (2+), (3) and (4) are two embodiments of the underwater object lifting and recovery device of the present invention;
Figure 2 is an overall view showing the lifting cable of the present invention. Overall view showing the buoy and buoy line attached to the seabed object, Part 3
Figures (1), (2), (3), and (4) are action diagrams showing the action of the present invention. 1... Lifting and collection cable, 2... Cable intermediate weight, 4... Floating body. 5... Rope with anchor, 7... Turning center buoyant body, 8...
... lifting cable tip weight, 9... cable, 11... buoy. 12...Buoy cable, 13...Undersea object, 14j...Ship.

Claims (1)

[Claims] A seabed object connected to a buoy floating in the sea via a stretched buoy cable is connected at one end to a ship on the sea and the other end to an anchored rope that wraps around the buoy cable as the ship turns on the seabed. In a device for lifting and retrieving by means of a lifting and retrieving cable, the above-mentioned lifting and retrieving cable tip weight is dropped and disposed on the seabed near the above-mentioned seabed object, and a turning center buoyant body is arranged near the top of the tip weight via the cable. A hoisting and retrieving line is provided, which is disposed on the turning center buoyant body via the anchored rope to which a plurality of floating bodies are attached, and is made of a cable intermediate weight that follows the turning of the vessel and turns near the seabed. Features: Lifting and retrieving equipment for underwater objects.