JPH0769277A - Carry in method of emergency cargo pump, etc., into cargo tank of lng ship - Google Patents

Abstract

PURPOSE:To stably perform a work for carrying an emergency cargo pump in a cargo tank at a trouble of a cargo pump. CONSTITUTION:A wire rope 20 is stretched between the vent posts 15 positioned before and behind the dome top board 8 in a cargo tank 4 in which a cargo pump is troubled, or between the vent posts 15 and an upper structure. A cargo block 19 is equipped with the wire rope 20. A chain block 21 is fitted to the cargo block 19, and in addition the winding rope 23 of a winch 22 is connected to it. An emergency cargo pump 25 is suspended by operating the chain block 21, moved over an emergency cargo handling pipe 14 by operating the cargo block 19, and carried in the cargo tank 4 while lowering by operating the chain block 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for carrying an emergency cargo pump or the like into a cargo tank of an LNG carrier.

[0002]

2. Description of the Related Art An LNG carrier for transporting LNG has, for example, five cargo holds 2 defined in a hull 1 as shown in (a) and (b) of FIG. , Through the support base 3. Installed cargo tanks 1-5,
Tank dome 5 located at the top of each cargo tank 4
Is projected from the warehouse 7 onto the upper deck 6 of the hull 1, and the periphery of the dome top plate 8 of the tank dome 5 and the warehouse edge 9 are connected and sealed by the dome joint 10. There is. In addition, a cargo pump 1 is attached to the lower end for unloading.
The cargo handling pipe 12 provided with 1 is installed so as to reach the position on the dome top plate 8 through the tank dome 5 from the bottom of each cargo tank 4, and at the lower end of the cargo handling pipe 12 for carrying a cargo. The cargo pipe 13 is branched and connected, and in case of failure of the cargo pump 11, the emergency cargo pipe is opened from the bottom of each cargo tank 4 to the dome top plate 8 through the tank dome 5. 14 is installed. Further, a manhole 30 is installed on the dome top plate 8. In FIG. 3A, 15 is a vent post standing on the upper deck 6 corresponding to each hold 2, 16 is a compressor room, and 17 is a cargo tank 4 in FIG. 3B. The central bulkhead of 1
Reference numeral 8 represents a cold insulating material.

In the LNG carrier, the cargo handling work in normal times is performed by using the cargo handling pipe 12. However, if the cargo pump 11 fails, the cargo handling cannot be carried out. In that case, the emergency cargo is handled. The pump is hung on the dome top plate 8 by a fixed or portable davit and carried into the cargo tank 4.

[0004]

However, since the above emergency cargo pump is heavy, for example, 1.5t, a large davit that can handle this emergency cargo pump must be prepared. In addition, when the davit is used, there is a problem that the operation of hanging the emergency cargo pump on the dome top plate 8 becomes unstable. Also, the same problem occurs when the spare cargo pump is carried into the cargo tank.

Therefore, the present invention eliminates the need for preparing a large davit for the emergency cargo pump or the spare cargo pump, and when suspending the emergency cargo pump or the like on the dome top plate. It is an object of the present invention to provide a method for carrying in an emergency cargo pump or the like into a cargo tank of an LNG ship, which enables stable operation of the above.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an upper structure between vent posts or between the vent posts and the hull that are erected on the upper deck so as to sandwich the dome top plate of the tank dome. A wire rope equipped with a cargo block is stretched between the cargo block and the chain block attached to the cargo block, and a cargo pump such as an emergency cargo pump or a spare cargo pump is lifted to a required height position. Then, while moving the cargo block along the wire rope by operating the winch, the cargo pump is transported to the upper part of the dome top plate of the tank dome, and then the cargo pump is moved horizontally by operating the auxiliary rope. It is characterized in that it is hung by the operation of the chain block while finely adjusting the position and carried into the cargo tank. NG and loading methods, such as emergency cargo pump into the cargo tank in the ship.

[0007]

[Effect] The emergency cargo pump or the like is easy to carry because it is moved along the wire rope by the cargo block, and the lifting and lowering operation is stable because it is hoisted down by operating the chain block. .

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. In the LNG carrier having the same structure as shown in FIGS. The case where the cargo tank 4 of No. 2 carries out an emergency cargo handling will be described.

That is, No. When the cargo pump 11 in the cargo tank 4 of No. 2 fails, first, No. The wire rope 20 equipped with the cargo block 19 is stretched between the upper portions of the vent posts 15 at positions where the dome top plate 8 of the second cargo tank 4 is sandwiched between the front and rear. Next, the chain block 21 is attached to the cargo block 19, and the manual winch 2 is attached to the cargo block 19.
One end of the hoisting rope 23 fed from 2 is locked via a guide sheave 24 provided on one vent post 15.

In this state, the emergency cargo pump 25 is
When transported to a position near the dome top plate 8 by required means, the cargo block 19 is operated by operating the winch 22.
Is moved along the wire rope 20 to position the chain block 21 above the emergency cargo pump 25. Then, the chain block 21 is operated to wind down the chain 26, and the cargo hook 27 is hung via the lifting tool 28. The emergency cargo pump 25 is suspended and supported. or,
At this time, the auxiliary rope 29 is attached to the emergency cargo pump 25.

Next, the chain block 21 is operated to hoist the emergency cargo pump 25 to a required height position, and then the winch 22 is operated to move the cargo block 19 to move the emergency cargo pump 25 to the dome. It is positioned above the emergency cargo handling pipe 14 protruding above the top plate 8, and thereafter, the auxiliary rope 29 attached to the emergency cargo pump 25 is appropriately operated to adjust the horizontal position of the emergency cargo pump 25. While finely adjusting, the emergency cargo pump 25 is hung by the operation of the chain block 21 and is carried into the bottom of the cargo tank 4 through the emergency cargo handling pipe 14.

As described above, after the emergency cargo pump 25 is carried into the bottom of the tank, the emergency cargo pump 25 is driven after performing predetermined work such as closing the upper end of the emergency cargo handling pipe 14 with a blind plate. No. The LNG in the second cargo tank 4 is unloaded through the emergency cargo handling pipe 14.

In the above, the emergency cargo pump 25
Is easily moved because it is moved along the wire rope 20 by the cargo block 19, and a stable lifting operation can be obtained because the chain block 21 is hoisted down. At this time, the weight of the emergency cargo pump 25 acts on the front and rear vent posts 15 via the chain block 21, the cargo block 19, and the wire rope 20, but the vent post 15 is an emergency cargo pump because of its structural design. There is no failure because it has sufficient strength to support the weight of 25.

In the above embodiment, the emergency cargo pump 25
In the above, the case where the cargo is loaded into the cargo tank 4 is shown, but the same can be applied to the case where the spare cargo pump is loaded into the cargo tank 4. That is, after transporting the spare cargo pump 25 'to a position above the dome top plate 8 in the same manner as in the above embodiment, the spare cargo pump 25' is mounted on the dome top plate 8 as indicated by a chain line in FIG. N of cargo tank 4 through manhole 30 of
o. 3 Carry it on the horizontal girder 31. The spare cargo pump 25 ′ is No. After being carried in to the 3 horizontal girder 31, it can be moved to the bottom of the tank by the pump moving device in the tank.

In the above embodiment, No. 2 shows an example of application to the cargo tank 4, but the present invention shows that
o. 1-No. All of the cargo tanks 4 of 5 are targeted. In this case, No. 1 and No. As for the cargo tank 4 of No. 3, the wire rope 20 may be stretched between the vent posts 15 at positions where the dome top plate 8 is sandwiched in the front and rear, as in the above-described embodiment. For the cargo tank 4 of No. 4, a wire rope 20 is stretched between a vent post 15 located in front of the dome top plate 8 and a compressor room 16 as an upper structure of the hull 1 located behind the dome top plate 8. It can be implemented by doing so. Furthermore, No. The cargo tank 4 of No. 5 can be similarly carried out by tensioning the wire rope 20 using the upper structure of the hull 1 such as a living area.

Further, the present invention is not limited to the above embodiment, but the chain block 21 and the winch 22.
Of course, a drive type such as an air drive type may be adopted so that the work can be further simplified, and of course, various changes can be made without departing from the scope of the present invention. Is.

[0018]

As described above, according to the method for carrying an emergency cargo pump or the like into the cargo tank of the LNG carrier of the present invention, when the cargo pump in the cargo tank fails, the cargo tank A wire rope is attached between the vent posts located in front of and behind the dome top plate or between the vent post and the upper structure of the hull, and a cargo block that can move along the wire rope is attached to the cargo block via a chain block. The cargo pumps and spare cargo pumps can be hung, and the position of the cargo pump can be lowered by the operation of the chain block while adjusting the position by the operation of the auxiliary rope so that the cargo pump can be carried into the cargo tank. The operation to hang down the machine can be performed stably, and a large davit is prepared for the emergency cargo pump etc. Made to avoid even if there is no, there is exhibited an excellent effect that.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an entire LNG ship showing an embodiment of the present invention.

FIG. 2 is an enlarged view of part A of FIG.

FIG. 3 is a view showing an example of an LNG carrier, (a) is an overall schematic view, and (b) is a BB enlarged arrow view of (a).

[Explanation of symbols]

 1 Hull 4 Cargo Tank 5 Tank Dome 8 Dome Top 11 Cargo Pump 14 Emergency Cargo Pipe 15 Vent Post 16 Compressor Room (Upper Structure) 19 Cargo Block 20 Wire Rope 21 Chain Block 25 Emergency Cargo Pump 25 'Spare Cargo Pump 29 Auxiliary rope

Claims (1)

[Claims] 1. A wire rope equipped with a cargo block is stretched between vent posts that are erected on the upper deck so as to sandwich the dome top plate of a tank dome or between the vent posts and the upper structure of the hull. Then, using a chain block attached to the cargo block, a cargo pump such as an emergency cargo pump or a spare cargo pump is lifted to a required height position, and then the cargo block is moved along a wire rope by a winch operation. While transporting the cargo pump to the upper part of the dome top plate of the tank dome, the cargo pump is then hung down by the operation of the chain block while finely adjusting the horizontal position by operating the auxiliary rope. Emergency cargo pump into the cargo tank of an LNG carrier characterized by being carried into the tank How to bring in etc.