KR20170010535A - Method for operating floating crane using floating dock - Google Patents

Abstract

The present invention relates to a method of operating a floating crane using a floating dock capable of additionally securing a lifting height of a floating crane, comprising: a preparation step of preparing a floating crane and a floating dock which can be floated at sea; an alignment step of positioning the floating crane on a line of the floating dock; and a lifting step of lifting an object to be lifted through the floating crane placed on the floating dock.

Description

METHOD FOR OPERATING FLOATING CRANE USING FLOATING DOCK FIELD OF THE INVENTION [0001]

The present invention relates to a method of operating an overhead crane using a floating dock, and more particularly, to a method of operating an overhead crane using a floating dock capable of securing a lifting height of the overhead crane using a floating dock.

Floating crane (floating crane) is a floating structure used for lifting heavy objects moving in floating state. It can be classified into various types depending on the degree of floating on the sea or diving.

Particularly, in case of semi-submersible type, the height of the structure tends to increase according to the tendency of conservation of environmental load such as typhoon, and lifting is not possible through existing marine cranes, There is a problem that the function of the marine crane can not be exhibited due to a case where the lifting height of the marine crane is out of the range.

Therefore, much research has been conducted on a method for securing lifting height of a marine crane.

Registration Utility Model Bulletin No. 20-0430736

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method of operating a marine crane using a floating dock capable of additionally securing a lifting height of a marine crane.

According to an aspect of the present invention, there is provided a method of preparing a floating cradle, the method comprising: preparing a floating cradle and a floating dock capable of floating at sea; An alignment step of positioning the floating crane on a line of the floating dock; And a lifting step of lifting the lifting object through the floating crane placed on the floating dock.

Preferably, in the preparing step, the depth of the floating dock is greater than the depth of the floating crane.

In addition, the aligning step may include balancing the floating dock so that the line of the floating dock is located below the sea level; And moving the marine crane on a line of the floating dock.

It is also preferable that a debalasting step is performed between the aligning step and the lifting step to de-ballasting the floating dock so that a line of the floating dock is located above the sea level.

In addition, it is preferable that the dibalasting step adjusts the discharge amount of the ballast water to determine the lifting height of the floating crane.

In addition, it is preferable to further include a fixing step of securing the floating crane on the floating dock between the aligning step and the lifting step.

According to the present invention, a lifting height of the floating crane can be easily secured.

In addition, the cost incurred in securing the lifting height of the floating crane can be reduced.

1 is a flowchart schematically showing a method of operating an overhead crane using a floating dock according to an embodiment of the present invention,
FIG. 2 is a front view schematically showing a preparation step in a method of operating an ocean crane using the floating dock shown in FIG. 1,
FIG. 3 is a front view schematically showing a ballasting step in a method of operating an overhead crane using the floating dock according to FIG. 1,
FIG. 4 is a front view schematically showing a moving step in a method of operating an ocean crane using the floating dock according to FIG. 1,
Fig. 5 is a front view schematically showing a debalasting step in a method of operating an overhead crane using the floating dock according to Fig. 1; Fig.

Hereinafter, a method of operating a floating crane using a floating dock according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a flowchart schematically showing a method of operating an overhead crane using a floating dock according to an embodiment of the present invention.

Referring to FIG. 1, a method (S100) for operating an overhead crane using a floating dock according to an embodiment of the present invention can further secure a lifting height of an overhead crane, and includes a preparing step (S110) , Fixing step S150, dibalasting step S160, and lifting step S170.

FIG. 2 is a front view schematically showing a preparation step in a method of operating an overhead crane using the floating dock according to FIG. 1; FIG.

Referring to FIG. 2, the preparing step S110 is a step of preparing a floating dock D and a floating crane C.

According to an embodiment of the present invention, the floating dock D and the floating crane C are prepared floating in the sea, respectively. In the case of the floating dock D, the floating dock D and the floating crane C are semi-submersible, It is not.

According to an embodiment of the present invention, it is preferable that the depth of the floating dock D is greater than the depth of the floating crane C.

This is because the depth of the floating dock D substantially provides a lifting height of the additional floating crane C.

The dimensions of the floating dock (D) and the floating crane (C) utilized in the embodiment of the present invention are as follows but are not limited thereto.

Floating dock Marine crane Length 221.2m 110.0m Breadth 47.9m 46.0m Depth 20.5m 7.5m

The aligning step S120 is a step of positioning the floating crane C on the line of the floating dock D and includes a balancing step S130 and a moving step S140.

3 is a front view schematically showing a ballasting step in a method of operating an overhead crane using the floating dock according to FIG.

3, the ballasting step S130 is a step of ballasting the ballast water of the floating dock D so that the line of the floating dock D is located on at least the sea level.

Here, the ballast means supplying the ballast water to the ballast tank of the ship, which means minimizing the fluctuation of the center of gravity of the ship by loading and unloading the cargo.

In other words, if the cargo is loaded on the vessel, the center of gravity of the vessel is positioned below the sea level without providing ballast water in the ballast tank, so that it can safely navigate even if an external force is applied from a wave or the like. Provide ballast water to the ballast tank so that a portion of the vessel can be positioned below sea level.

Furthermore, when the center of gravity of the ship is biased, the equilibrium state of the ship may be maintained by providing or discharging ballast water to the ballast tank at a specific position to compensate for the center of gravity of the ship.

In one embodiment of the present invention, the ballast is used in a manner different from the ballast in the general sense as described above. That is, the ballast is used to change the position of the floating dock D on the line.

The lifting height of the floating crane C can be improved by positioning the floating crane C on the line of the floating dock D, Can be seen as a preparatory step for allowing the user to move on the line of the floating dock (D).

In view of this, it is more preferable to ballast the floating dock so that the line of the floating dock D is located below the sea level so that the lower end of the floating crane C and the line of the floating dock D do not collide with each other.

Accordingly, it is a matter of course that the discharge amount of the ballast water discharged in the ballasting step S130 can be appropriately adjusted according to the specifications of the marine cranes C utilized.

4 is a front view schematically showing a moving step in a method of operating an overhead crane using the floating dock according to FIG.

Referring to FIG. 4, the moving step S130 is a step of moving the floating crane C to the upper side of the floating dock D, which is positioned on the ship, through ballasting step S120.

That is, in the method (S100) of operating the floating cranes using the floating dock according to the embodiment of the present invention, the floating crane (C) adjusts the ballasting of the floating dock (D) Lt; / RTI >

The fixing step S140 is a step of fixing the position of the floating crane C on the line of the floating dock D.

If the lifting object is lifted through the lifting step S170, the floating crane C may be detached from the floating dock D if the floating crane C is not supported. Accordingly, in the embodiment of the present invention, the above-described problem can be prevented by fixing the position of the floating crane C on the line of the floating dock D.

According to an embodiment of the present invention, the fixing step S140 may be performed through sea-fastening, but is not limited thereto.

Fig. 5 is a front view schematically showing a debalasting step in a method of operating an overhead crane using the floating dock according to Fig. 1; Fig.

Referring to FIG. 5, the deburating step S160 is a step of debarating the floating dock F so that the line of the floating dock F is above the sea level.

It is possible to adjust the position of the floating dock D in the vicinity of the sea level through the balancing step S130 and adjust the position of the floating dock D above the sea level through the dilating step S160, The crane C forms a state in which the lifting object can be lifted.

Here, the lifting height of the floating crane (C) can be adjusted by adjusting the discharge amount of the ballast water to be deformed, which may be a sum of the depth of the maximum floating dock (D) and the depth of the floating crane (C).

For reference, it is the floating dock (D) that is debalasted in the de-ballast step (S160), and it is not de-ballasting in the case of the floating crane (C).

The lifting capacity of the marine crane C is determined by its own ballast tank of the marine crane C and more specifically the ballast water stored in the ballast tank, There is no need to weaken the lifting capacity of the crane (C).

It would therefore be desirable to perform additional dilatation in the floating dock (D), taking into account this rather than devalating the marine crane (C).

Of course, it is needless to say that the present invention is not limited to the above-described method.

Meanwhile, the fixing step S150 and the deberalating step S160 are not particularly related to each other, and the deberalating step S160 may be performed after the fixing step S150 as in the embodiment of the present invention. However, on the contrary, the fixing step S150 may be performed after the dibalasting step S160. Further, the dibalasting step S160 may be partially performed to place the line of the floating dock D on the sea surface, the fixing step S150 may be completed, and the deburring step S160 may be performed again .

The lifting step S170 is a step of lifting the lifting object through the floating crane C located on the floating dock D. [

Here, a specific operation for lifting the lifting object is performed through the floating crane (C), and the floating dock (D) is utilized to further secure the lifting height of the floating crane (C).

Of course, it is preferable that the movement of the floating crane (C) is performed through the movement of the floating dock (D).

Here, the object to be lifted can be lifted by the ship under construction or mounted on the offshore plant, but it is not limited thereto and it is obvious that it can be utilized in all operations performed at sea.

It is to be understood that the scope of the present invention is not limited to the above embodiments and that various changes and modifications may be made without departing from the spirit and scope of the present invention, I will see.

S100: Operation method of floating crane using floating dock
S110: preparation step S120: alignment step
S130: Balusting step S140: Moving step
S150: Fixing step S160: De-ballasting step
S170: Salvage step

Claims (6)

Preparing sea cranes and floating docks for floating on the sea;
An alignment step of positioning the floating crane on a line of the floating dock;
And lifting the lifting object through a floating crane located on the floating dock. The method according to claim 1,
In the preparation step,
Wherein the floating dock has a depth greater than a depth of the floating crane. The method according to claim 1,
The aligning step comprises:
A ballasting step of ballasting the floating dock so that the line of the floating dock is located below the sea level; And a moving step of moving the marine crane on a line of the floating dock. The method of claim 3,
Between the aligning step and the lifting step,
And dibalasting the floating dock so that the line of the floating dock is located above the sea level. 5. The method of claim 4,
Wherein the dibalasting step adjusts the discharge amount of the ballast water to determine the lifting height of the floating crane. The method according to claim 1,
Between the aligning step and the lifting step,
And a fixing step of fixing the floating crane on the floating dock.

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