JPS6349593A - Dismantle method for marine vessel - Google Patents

Abstract

PURPOSE:To carry out the wrecking and removal of a hull simply and inexpensively, by applying a corrosive agent inducing an intensive deterioration on the breaking parts of a hull constituting member, and breaking the hull constituting member into parts by an impact force adding means at the point of time when the corrosion on the agent-applied part has advanced. CONSTITUTION:In order to break down the constituting member of a hull 3, for example, a shell plate 8 into a plurality of small blocks 4, a corrosive agent 5 inducing an intensive deterioration is applied on the breaking parts of the shell plate 8. And after the hull 3 has been leaved as it is so that the corrosion on the shell plate 8 due to the corrosion agent 5 can be advanced, explosives 6 such as dynamite as an impact force adding means are set up on each small block 4. Thereafter, by exploding the explosives 6 simultaneously, the corrosive agent 5 applied parts having been reduced in the strength of material are broken, and hence the hull 3 is broken down into each individual small block 4, so that small pieces of the shell plate 8 are piled up on the bottom of a dock. Thus, without performing the two-stage work of large dismantling and small dismantling, the hull can be wrecked and removed simply and inexpensively only by one operation.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for dismantling a ship.

[Conventional technology]

Conventionally, when dismantling a ship, first the hull 1 shown in the side view of Figure 5 is disassembled into blocks 2 using a fusing machine or the like, and then the large blocks 2 are moved to land. Dismantling is carried out through two major steps: cutting and disassembling this material into small pieces.

[Problem that the invention seeks to solve]

However, this method of dismantling requires a lot of man-hours to transport the blocks that have been cut apart and to break them down into smaller pieces, which results in a large cost for dismantling the ship. I'm here.

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide a method for dismantling a ship that reduces man-hours and costs.

[Means for solving problems]

To this end, the present invention provides a method for dismantling a ship, in which a corrosive agent that induces strength deterioration is applied to the fractured part of the ship's hull structural member,
When the chemical reaction caused by the corrosive agent progresses and the strength of the member at the applied part deteriorates, the impact force applying means (which is characterized by being subdivided into parts) disposed inside the ship.

[For production]

With such a method, it is possible to obtain a method for dismantling a ship that reduces man-hours and costs.

〔Example〕

An embodiment in which the present invention is applied to a dismantling machine for outer panels will be explained with reference to the drawings. FIG. 1 is a side view thereof, and FIG. 2 is a partially enlarged perspective view showing a state in which the outer panel of FIG. 1 is coated with a corrosive agent. Figure, 3rd
The figure is a partially enlarged perspective view showing a state in which the corrosion of the outer panel of FIG. 2 has progressed, and FIG. 4 is a perspective view of the outer panel of FIG. 2 showing a procedure for exploding it.

In the above figure, 3 is the hull, 4 is a small block, 5 is a corrosive coating area, 6 is an explosive, 7 is a dock bottom, 8 is an outer plate, and 9 is a corrosive agent. Examples of the corrosive agent 9 include nitric acid and fluorine. One possibility is to add a thickener to a product whose main component is acid to make it into a gel.

First, as shown in FIG. 1, in order to disassemble the outer panel 8 into a plurality of small blocks, the corrosive agent 9 is applied at a rate of several millimeters, and as shown in FIG. Apply in a band-like or raised state.

If left for a few days, the corrosion will progress to a depth of several millimeters, as shown in Figure 3, and band-shaped grooves will be formed on the outer plate, where the material strength of the steel plate will be lower than before the corrosion progressed. This is a marked decline in comparison.

Next, with the corrosion progressing in this manner, explosives 6 are placed in every few small blocks 4, as shown in FIG. An example of the explosive 6 is dynamite.

In this way, explosives are placed every few blocks on the steel plates and members throughout the hull, and then when they are detonated all at once, the impact destroys the corrosive coating area 5, where the material strength has decreased, and the hull 3 is decomposed into multiple small blocks 4,
The small pieces of the hull constituent materials are piled up on the bottom 7.

〔Effect of the invention〕

With this method, ship dismantling work, which used to require a lot of man-hours and expense because it was divided into two stages: large disassembly and small disassembly, can now be disassembled into small blocks in a short time by the impact of an explosion. Become.

In short, according to the present invention, in a method for dismantling a ship, a corrosive agent that induces strength deterioration is applied to a fractured part of a hull structural member, and a point at which a chemical reaction by the corrosive agent progresses and the strength of the member at the applied part deteriorates. The present invention is industrially extremely useful because it provides a method for dismantling a ship that reduces man-hours and costs by subdividing the impact force applying means arranged inside the ship.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
Fig. 3 is a partially enlarged perspective view showing the state in which corrosive agent has been applied to the outer panel of Fig. 2; Fig. 3 is a partially enlarged perspective view of the outer panel of Fig. 2 showing a state in which corrosion has progressed; FIG. 3 is a perspective view showing the procedure for blasting a plate. FIG. 5 is a side view showing a known procedure for disassembling a ship. 3. Hull, 4. Small block, 5. Corrosive agent application area,
6. Explosives, 7. Dock bottom, 8. Outer plate, 9. Corrosive agent.

Claims (1)

[Claims] In a method for dismantling a ship, a corrosive agent that induces strength deterioration is applied to a fractured part of a ship's hull component, and when a chemical reaction by the corrosive agent progresses and the strength of the applied part deteriorates, A method for dismantling a ship, characterized in that the ship is subdivided by impact force applying means placed inside the ship.