JPH01197196A - Launching way recovery method - Google Patents

Abstract

PURPOSE:To float a launching way from seabottom with float force of each buoyance bag so as to facilitate the recovery by setting a plurality of shrinked buoyance bags at a proper distance in the longitudinal direction of the launching way, and swelling them with the supply of compressed air thereto after a newly built ship is launched. CONSTITUTION:Shipbuilding is carried out in a dock through a launching way 7 comprising wood block, upper base, sliding base and the like. A plurality of capsules 17 are arranged at the launching way in a proper distance. In each capsule a buoyance bag 18 shrinked is stored, and the capsule 17 is released in accordance with swelling of the buoyance bag 18 at the time of supply of compression air into the bag 18 through an air hose 19, thereby the bag 18 can float. The launching way 7 is floated near sea surface 11 with the float force of this bag 18, and the way 7 is moved in the direction of ship base 16 by a ship crane (not shown), and then recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a launching pad recovery method that is applied to a launching pad recovery operation for a newly built ship.

[Conventional technology]

A method for launching a new ship using the slipway method will be explained with reference to FIGS. 2 and 6.

First, FIG. 2 (A) is a side view, and (B) is a partially enlarged view.

(C) Cross-sectional view and (D) partially enlarged view show the launch preparation status, and the newly built ship 1, which has been constructed, slides through the board 3, arrow 4, and landing platform 5 by the holding wire 2. It is integrated with a platform 6 (hereinafter, these platforms 3 to 6 will be collectively referred to as the launch platform 7).

The slide 6 rests on a fixed base 9 via a copper ball 8, and the fixed base 9 has an inclination of about 43/1000, and a trigger base 10 is installed to prevent the slide 6 on the ball 8 from sliding. Supports gliding ability. The launch is this trigger stand 10
This is done by mechanically eliminating the supporting force of the sliding table 9 and sliding the sliding table 6 or more on the fixed table 9 toward the sea by the rolling of the ball 8.

As shown in the side view of Fig. 3, the newly built ship 1, which has planed toward the sea, floats on the sea surface 11 after planing, and when the bow section 1a passes through the slip gate 13 (see Fig. 4, ■), the third Figure ■
As shown in the side view, the holding wire 2 is mechanically attached to the new ship 1.
The launch platform 7 is separated from the new ship 1 and sinks, becoming a trap and sinking to the seabed 12 as shown in the side view of FIG. 6.

The conventional method for recovering the launching platform 7 that has sunk to the seabed 12 in this way will be explained with reference to FIG. 4. The launching platform 7 has a cylindrical structure as shown in FIG. 2 (B). The overall length is a little shorter than the construction captain (typically 200 m), and most of the materials are wood, except for the trigger stand 10, which is made of steel and weighs about 2
0 TON, launch platform 7 of such a structure is placed on the seabed 1
2. In order to recover the water, as shown in Figure 4 ■ Side view,
2 offshore cranes 14 and 1 platform crane along the length
A total of three units (5) will be used to lift it from the ocean floor (12) to near the sea surface (11). And as shown in Figure 4 ■ Side view,
While moving in the direction of the platform 16, the launching platform 7 is hoisted several times by the crane 14, 15, and the work is continued until the launching platform 7 is completely raised above the platform 16.

However, such a launching platform recovery method has the following problems.

(1) Two offshore cranes are required, and the cost for the offshore cranes is large.

(2) Lifting, rehanging, and moving the launch platform using a crane requires a lot of time and workers, and the work cost is r.
is huge.

[Problem to be solved by the invention]

The present invention was proposed in view of these circumstances, and
There is no need for offshore cranes, and the cost can be eliminated.
It is also an object of the present invention to provide a launching platform recovery method that can greatly reduce the work of lifting and rehanging the launching platform with a crane, and can greatly shorten the working time.

[Means to solve the problem]

To this end, the present invention has a plurality of deflated float bladders attached to the launch platform at appropriate intervals in the length direction, and after the launch of a new ship, compressed air is supplied to the float bladders to inflate them and float them. It is characterized in that the launch platform is raised from the seabed by force.

[For production]

With the above configuration, there is no need for a marine crane and its cost can be eliminated, and the work of hoisting and rehanging the launch platform using a crane can be greatly reduced, and the work time can be greatly shortened. can be obtained.

〔Example〕

An embodiment of the launching platform recovery method of the present invention will be explained with reference to the drawings. Fig. 1 is a side view showing the method of the present invention in the order of steps (1), (2), and (3).

First, in Figure 1 ■ (A), a plurality of capsules 17 are attached to the launch platform 7 at appropriate intervals, and inside the capsules 17 there are as shown in Figure 1 ○ (B). A deflated swim bladder 18 is housed therein, and compressed air is sent to the swim bladder 18 from a work boat on land or at sea via an air hose 19. As shown in the figure, when the swim bladder 18 begins to expand with compressed air, the capsule 17 opens and the swim bladder 18
Since it is connected to the launch platform 7 by a wire 20, it expands in the sea.

When the swim bladder 18 is completely inflated, the launching platform 7, which has sunk to the seabed 12, is raised to near the sea surface 11, as shown by 4° in FIG. Then, as shown in FIG. 1, the launching platform 7, which has surfaced close to the sea surface 11, is moved in the direction of the platform 16 by the platform crane 15. In this way, the launch platform 7 is supported by the buoyant force of the swim bladder 18 and the lifting force of the platform crane 15.
It is completely pulled up onto the platform 16.

〔Effect of the invention〕

In short, according to the present invention, a plurality of deflated swim bladders are installed at appropriate intervals in the length direction of the launching platform, and after the launch of a new ship, compressed air is supplied to the swim bladders to inflate them. By raising the above-mentioned launch platform from the seabed using buoyancy,
There is no need for offshore cranes, and the cost can be eliminated.
In addition, the present invention is industrially extremely useful because it provides a method for recovering a launching platform that can greatly reduce the work required to lift and rehang the launching platform using a crane and greatly shorten the working time.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the launching platform recovery method of the present invention.
FIG. Figure 2 shows the launch preparation status of a publicly known new ship;
) is a side view, Figure CB) is a partially enlarged view, Figure (C) is a cross-sectional view, Figure (D) is a partially enlarged view, and Figure 3 shows the launching situation of a known new ship. FIG. 4 is a side view showing the conventional launching platform recovery method in the order of steps (1) and (2). 1... Newly built ship, 1a... Fore part, 2... Hugging wire, 3... Piece board, 4... Arrow, 5... Landing platform, 6
...Slide, 7.Launch platform, 8.Ball, 9.
...Fixed stand, 10...Trigger stand, 11...Sea surface, 1
2...Seafloor, 13...Ship gate, 14...Marine crane, 15...Ship crane, 16...Ship,
17... Capsule, 18... Swimming bladder, 19... Air hose, 20... Wire. Agent: Masa Tsukamoto, Patent Attorney Figure 2 (C)

Claims (1)

[Claims] A plurality of deflated swim bladders are attached to the launching platform at appropriate intervals in the length direction, and after the launch of a new ship, compressed air is supplied to the swim bladders to inflate them and float them. A method for recovering a launching platform, characterized in that the launching platform is raised from the seabed by force.