JPS5810272B2 - Offshore factory for ship dismantling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floating dismantling factory used when dismantling ship hulls.

Generally, a large amount of high-grade metal materials are used in the hull of a ship, and when a ship is scrapped, it is dismantled and commercialized as metal materials such as plates, bars, and shapes, or as scrap material.

The conventional method of dismantling a ship's hull is to float the scrapped ship in a suitable port, and first cut the part of the hull that is above the water surface into large pieces (generally called large pieces). ) This is lifted using a marine crane or an overhanging crane from land and lined up on land, and this large block is cut into small blocks of a predetermined size.

(Generally referred to as small scraps) Once the hull part that was floating above the water surface has been dismantled, the remaining hull (submerged part) will leak into shallow water and avoid interference in the event of interference. After waiting, the hull that appeared on the water surface is dismantled in the same manner as described above.

The conventional ship dismantling method described above requires a place to moor the ship, suitable shallow water, and a landing place to arrange the dismantled products and cut them into small pieces, and for this reason, work can only be carried out in specific places. .

In countries such as Japan, where port facilities must be used efficiently, this is not only a significant constraint, but is also one of the causes of soaring demolition costs.

Another big problem is that because the demolition work is carried out in two separate locations, such as large and small disassembly, it is necessary to use a marine crane or an overhang crane to lift and transport the work, which increases the overall man-hours required. This accounts for 30% of the total demolition work.

Further, as mentioned above, there is a problem in that a large number of workers are required because the dismantling site is divided into a plurality of locations.

Due to the above-mentioned circumstances, conventional demolition methods are subject to significant restrictions on the location of demolition and require a large number of personnel, making the metal materials and scrap obtained inevitably expensive. There were drawbacks.

In order to eliminate the drawbacks of the prior art, the present inventor has developed a method for consistently dismantling even small pieces at sea, but the present invention provides a marine factory for dismantling work carried out at sea. be.

The requirements for a floating factory are that it has its own buoyancy and can float close to the hull to be dismantled.

A force that comes into contact with a part of the bottom of a ship and pushes it up.

Ability to move relative to the hull in the longitudinal direction of the hull.

The ship's hull and offshore factory must have support means that will prevent them from coming into contact and being damaged even if they are exposed to the action of wind or waves.

The present invention provides a marine demolition factory that satisfies the above conditions, and will be described in detail below with reference to the drawings.

Figure 1 is a side view showing the offshore factory located at the bow of the ship prior to the start of work to dismantle the hull, Figure 2 is a plan view at the position shown in Figure 1, and Figure 3 is the state during dismantling work. FIG.

Further, FIG. 4 is a perspective view of the offshore factory, and FIGS. 5 and 6 are a sectional view and a plan view thereof, respectively.

F is an offshore factory, and the following various equipments are installed on the barge 1 that constitutes the main body.

The barge 1 is similar to a floating dock and can be floated and lowered by injecting water into the barge's tank, and is shaped like a letter when viewed from the front, with vertical parts 1a and 1 on both sides.
b is located on the side of the hull, and horizontal portion 1c is located on the bottom of the ship.

The vertical parts 1a and 1b of the barge 1 are equipped with side holding devices 2.
and a winch 3 (carrying device).

Furthermore, rails 13 are provided on the vertical parts 1a' and 1b', which are one level lower than the part where the winch 3 and the like are installed, on which the demolition equipment 4 can move in the longitudinal direction of the ship. There is.

An air spring 5 is provided on the horizontal portion 1c of the barge 1,
A purge loading platform 6 (floating support device) is provided above this, and a carrier roller 7 is provided above this, and is used to support the bottom of the hull 8.

The carrier roller 7 is provided to distribute the weight of the hull 8 and to facilitate the movement of the hull 8.
If the speed of pulling the barge onto the barge 1 is slow, normal support means such as sliding support members such as sleepers or boards may be used.

An anchor rope 9 is provided on the barge 1 to prevent the offshore factory from moving during demolition work.

Reference numeral 10 denotes a buoyant body, which is deflated before use, and after being attached to the bottom of the ship, air is supplied into the buoyant body to inflate it, and its buoyancy causes the hull 8 to float.

The side holding device 2 is a device in which a rotating body such as a rubber roller is attached to the tip, and this is attached to an extendable arm.

Carrier rollers 7 are arranged above the barge loading platform 6 to facilitate movement between the hull 8 and the offshore factory.
It is constructed so that surface pressure is applied to the horizontal portion 1c of the barge by an air spring 5 provided below the purge loading platform 6, so that it receives a large load.

When dismantling a ship using the offshore factory F,
As shown in the figure, a buoyancy body 10 is attached to the bottom of the bow (or the bottom of the stern) of the hull 8, and one side of the hull 8 is floated by the buoyancy of the body 8, and then the barge 1 is placed on the bottom of the hull 8 and installed on the X hull 8. A barge 1 is positioned at the bottom of the ship using a wire 12 stretched between a pulley 11 and a winch 3, and the buoyancy of the barge 1 is increased as necessary to securely support a part of the ship body 8.

Once the offshore factory is located as shown in Figure 1, demolition work will begin.

The dismantling work is carried out safely and efficiently using the dismantling device 4 which is capable of cutting and transporting in three dimensions.

In addition, this dismantling work starts from the bow or stern of the ship, and as the ship is being dismantled to shorten the length of the ship, the pulling and moving of the ship's hull 8 to the offshore factory F, which is carried out as the demolition work progresses, is carried out using a winch. 3 and the motorized carrier roller 7, and the sequential movement of the buoyancy body 10 rearward (toward the left in FIG. 1).

According to the inventors' experiments, it is best to start this dismantling work from the bow or stern, and after dismantling a certain distance, proceed in the opposite direction, and at the final stage, proceed with the work in the state shown in Figure 3. It is better.

Since the offshore factory according to the present invention is configured as described above, it has the following effects.

(a) The barge 1 is provided with vertical parts 1a and 1b, and has buoyancy to support part of the weight of the hull 8 to be dismantled, and the dismantling work is carried out with the hull 8 pulled onto the barge 1 and supported. Therefore, the relative relationship between the hull 8 and the barge 1 can be maintained reliably, and the dismantling work can proceed safely and reliably.

(b) As a means for carrying the hull 8 onto the barge 1, the winch 3 and the wire 12 are used to move the barge 1 and the hull 8 relatively. Even if the distance to be pulled upward is long, the hull 8 can be easily moved, and even if there is relative movement between the barge 1 and the hull 8 due to wave force or wind power, for example, the pulling work can be performed safely. be able to.

(c) Since a floating support device including an air spring 5 and a barge loading platform 6 is provided on the barge 1, it supports part of the weight of the hull 8 and even if the hull 8 is shaken by waves. This can be followed.

2) The vertical parts 1a and 1b of the barge 1 are provided with side holding devices 2, which act as guides when pulling the hull 8 into the barge 1, and also prevent horizontal movement of the hull 8 due to wind and waves. Since the barge 1 can follow the rotation, the dismantling work can be carried out smoothly without damaging the hull 8 or the barge 1.

(E) The dismantling device 4 runs on the rails 13, and the frame 15 moves up and down.

Gondola 17 and hoist 18 attached to this frame
Using this, three-dimensional demolition and cutting work can be carried out safely and efficiently.

[Brief explanation of drawings]

Figure 1 is a side view showing the offshore factory located at the bow of the ship, Figure 2 is a plan view showing the relationship between the bow and the offshore factory in Figure 1, and Figure 3 is the state during dismantling work. FIG. Further, FIG. 4 is a perspective view of the offshore factory, and FIGS. 5 and 6 are a sectional view and a plan view thereof, respectively. F... Offshore factory, 1... Barge, 1a
, 1b... Vertical portion, 1c... Horizontal portion, 2... Broadside holding device, 3... Winch, 4... Demolition device, 5... Air splash, 6... Barge loading platform, 7... Carrier roller, 8... Hull, 9... Anchor rope. , 10... Buoyant body, 11...
Pulley, 12...wire, 13...rail, 14...roller conveyor, 15...
...Frame, 16...Gondola, 17...
・Gondola, 18...Hoist.

Claims (1)

[Claims] 1 A purge having a buoyancy capable of supporting part of the weight of the hull to be dismantled and having vertical parts located on both sides of the hull, and a purge attached to the vertical part of the purge and in contact with the side of the hull. a side holding device for supporting and guiding the purge; a carrying device for pulling the hull onto the purge, which is comprised of a winch and a wire attached to the purge; and a support device on the purge via an air spring. It consists of a purge loading platform that supports the bottom of the ship and can change its supporting posture, and a dismantling device that moves on rails provided on the purge and lifts and lowers a frame body that has a cutting machine and a transport device. Offshore factory for ship dismantling.