JPS6016532B2 - salvage platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot-water-lifting platform used when a ship floating on water is brought to land or lowered from land to water.

To salvage the ship, as shown in Figure 1, an underwater foundation is constructed on the bottom of the water until a predetermined water depth is obtained, and a rail 4 and a trolley 5 are installed on top of this underwater foundation 3. With the bow of the hull 1 of the ship to be lifted ashore pressed onto the trolley 5 by its own weight, the hot water pulling element 6 connected to the trolley 5 was wound around the winch 7 and the hull 1 was gradually pulled up onto land. In this case, there were problems such as the construction of the underwater foundation 3 being difficult and increasing the construction period and cost. In view of the above-mentioned problems, the present invention provides a hoisting platform that can easily perform the above-mentioned work with simple equipment.

Embodiments of the present invention will be described below with reference to the drawings. 11 is a floating body installed near the boundary between underwater and land;
The underwater side end portion 11a of the floating body 11 can swing up and down about a hinge 12, and a buoyancy adjustment tank 13 is provided inside the floating body 11.

The buoyancy adjustment tank 13 can be filled with water, and the floating body 11
The rotational moment of the floating body 11 relative to the hinge 12 on which the buoyant force acts due to the drainage of the buoyancy adjustment tank 13 is
It is constructed such that the rotational moment on the hinge 12 on which the underwater weight acts in each of the towing states of the hull 1 mounted on the floating body 11 is larger, and the upward movement limit of the upper surface 14 of the floating body 11 is equal to the upper surface 16 of the land platform 15. The inclined surface is configured to be flush with each other. 17 is a rail installed on the floating body 11, and 18 is a rail installed on the land platform 15.

Therefore, water is poured into the buoyancy adjustment tank 13, and the floating body 11 is moved to the second
After rotating and sinking to the state shown in the figure to obtain a required water depth, the bow of the hull 1 to be mounted is mounted on the script 5. Thereafter, the bogie 5 is hoisted up by the winch 7 via the guiding pulley 20 by the hot water pulling element 6, and the ballast water in the buoyancy adjustment tank 13 is discharged to raise the hull 1. After the front part of the hull 1 is pulled up onto land as shown in Figure 3, the floating body 11 is moved up until the top surface 14 of the floating body 11 is flush with the top surface 16 of the land platform 15, and then the hull 1 is moved to the land platform. Boil the hot water to the specified position of 15. Further, when lowering the hull 1 which has been pulled up to the land platform 15 into the water, the above-mentioned operation may be reversed.

Further, if the depth of the underwater end 11a of the floating body 11 is sufficient to suspend the hull 1 from the bow of the suspended hull 1 in the state shown in FIG. There is no need to change the vertical movement of the floating body due to ocean drainage. 4 and 5 show changes in the force and moment acting on the floating body 11 when the bow of the hull 1 comes into contact with the trolley 5 and is subsequently pulled up.

That is, the parast of the buoyancy adjustment tank 12 is adjusted so that the floating body 11 can withstand the rotational moment of force due to the difference between the weight of the hull 1 and the buoyancy. Ws: Hull weight Bs: Hull buoyancy R: Ws-Bs a,: Distance from the bow end of the center of the hull weight a2: Distance from the bow end of the hull buoyancy center As explained above, the present invention uses the vicinity of the water-land boundary as the fulcrum. The hull is mounted on a floating body that can swing up and down in the water, and in this state, the floating body is raised until the top surface of the floating body is flush with the top surface of the landing platform, and then the hull is brought to land. Therefore, there is no need for underwater foundation work as in the past, and all that is required is to install the floating body, which shortens the construction period.Furthermore, the floating body is removable, making it convenient for transportation and installation, and easy maintenance and inspection.

In addition, by moving the floating body up and down in the water, the depth of the water to accommodate the stagnant water at the bow of the suspended ship is limited, so the length of the floating body, that is, the underwater platform, can be shortened, so it can be used in cramped spaces. be.

[Brief explanation of the drawing]

Fig. 1 shows a conventional hot-water floating cradle, Figs. 2 and 3 are explanatory diagrams showing the hot-water cradle of the present invention, and Figs. 4 and 6 show the force and force acting on the floating body when hoisting the cradle. It is a change explanatory diagram. 1... Hull, 5... Trolley, 6... Hydrogen, 11... Floating body, 1
2... Hinge, 13... Buoyancy adjustment tank. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. Provide a floating body that can swing up and down using the vicinity of the water-land boundary as a fulcrum, and install a buoyancy adjustment tank inside this floating body,
This floating platform is characterized in that its upper surface is flush with the upper surface of the land platform as the floating body moves upward.