JPH0635908Y2 - Receiving equipment for liquefied gas carriers - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention provides a secure and reliable cargo handling by stabilizing the locked state of a carrier when transporting liquefied gas such as LPG and LNG to a land base on a relatively small scale. In addition, the present invention relates to a receiving facility for a liquefied gas carrier at a receiving terminal that allows the carrier to take part of the role of the base tank.

[0002]

2. Description of the Related Art Conventionally, when a liquefied gas is transported to a land base on a relatively small scale by a barge of a pusher / barge system or a liquefied gas carrier such as a self-propelled barge, The carrier is brought close to the quay, the land side and the mooring line are bridged, and the mooring machine on the ship is used to berth, and in this locked state, the land storage tank is unloaded.
Variations in the hull due to differences in tides and waves that adversely affect cargo handling operations such as loading and unloading of liquefied gas are unavoidable, and a mooring method for mooring the hull in a safe and reliable manner is required to counter this. A connection mechanism is required at the connection of the liquefied gas piping between the hull and the land side, which can safely and reliably absorb the relative displacement due to the fluctuation of the hull, and the mooring of the carrier when the sea condition becomes rough due to abnormal weather such as a typhoon. It was necessary to solve the problem and evacuate to a safe place, and during this time, there was a problem that the transportation of liquefied gas was temporarily stopped.

[0003] Taking the case one step further, considering the case where a part of the onshore storage tank of the receiving terminal is used in a liquefied gas carrier in the transportation of such a liquefied gas, the above-mentioned problems will occur. In addition to mooring methods that ensure mooring safely and reliably for a considerable period of time, and even in abnormal weather such as typhoons, the carrier must stay at the base as it is. Are all unknown.

The object of the present invention is to provide a solution to the above-mentioned problems of the prior art, and to provide a secure and reliable means for locking a liquefied gas carrier engaged in the transportation of liquefied gas at a receiving terminal, thereby providing a land on the terminal. It is also possible to use it as part of a storage tank.

[0005]

In order to achieve the above-mentioned object, the receiving equipment for a liquefied gas carrier according to the present invention is equipped with a dock for docking the liquefied gas carrier at the receiving terminal, and opening and closing the dock opening and closing. With a door to open and close,
An all-peripheral support member conforming to the bottom shape of the liquefied gas carrier is provided on the dock bottom, a packing is provided on the upper surface of the outer peripheral edge thereof, and water in the inner space is forcibly discharged into a space inside the all-peripheral support member. It is characterized in that a pump for connecting is connected.

[0006]

[Function] After the liquefied gas carrier is docked in the dock that has the door that opens and closes the entrance / exit of the receiving terminal, water is poured into the ballast tank compartment inside the carrier to ensure that the draft reaches the dock bottom. Increase until bottom. The dock door should be closed so that the bottom of the carrier does not become unstable due to waves in the outside water.

[0007] Then, when all the peripheral support members conforming to the shape of the bottom of the carrier are provided at the bottom of the dock, and the water inside thereof is forcibly discharged by a pump, a downward suction force acts on the carrier,
The bottom will be more stable. This action is effective in stably holding the carrier even when the carrier ships the liquefied gas to the base and the hull becomes lighter by that amount and tends to bottom.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a dock 2 that has entered the receiving terminal 1 is provided, and a door 7 for opening and closing the inside of the dock 2 is provided at an entrance / exit 3 of the dock 2, and a liquefied gas carrier 4 can enter and exit the dock 2. The dock 2 can be docked through the opening 3. The illustrated carrier 4 is a barge of a pusher barge system, having a liquefied gas tank 5 and a ballast tank compartment 6 (FIG. 2).

FIG. 2 shows an arrangement in which all the peripheral support members 8 continuous to the dock bottom 2'according to the shape of the bottom 4'of the carrier 4 are arranged, so that the carrier 4 can be easily installed on the dock bottom. .

In FIG. 3, a packing 9 is provided on the upper surface of the outer peripheral edge of all the continuous peripheral supporting members 8 ', and water in a space 10 inside the packing 9 is forcibly discharged by a pump 11. In this case, the bottom portion of the carrier is shown. Then, for example, since the pressure is lower than that of the embodiment of FIG. 2, the downward suction force works to reduce the amount of water poured into the ballast tank section 6, or when the amount of water poured into the ballast tank section 6 is the same. The installation of the carrier will be more stable and reliable. Further, this also effectively discharges the liquefied gas, and the hull becomes lighter by that amount to have a tendency to leave the bottom, which is effective in stably holding and holding the carrier ship in the dock 2.

Now, the process of delivering the liquefied gas by docking the carrier ship in the dock of the receiving terminal 1 and then bottoming the dock will be described. Immediately after the liquefied gas carrier 4 is docked in the dock, the carrier 4 is in a floating state as shown in FIG. From this state, next, as shown in FIG. 5, a water injection / drainage device (not shown) on the ship side
In this way, the water in the dock 2 is poured into the ballast tank section 6 to deepen the draft and to reach the bottom of the dock. As shown in Fig. 1, the access opening 3 of the dock 2 is closed by a door 7 after the dock so that the bottom of the carrier is not unstable due to the waves in the outside water area. When the door 7 is a closed type, the water in the dock 2 is closed. It is also possible to reach the bottom by lowering the water level inside the dock 2 by discharging the required amount to the outside water area using the water injection / drainage device on the base side.
In this case, the amount of water to be injected into the ballast tank compartment 6 for bottoming may be smaller, or the ballast tank compartment 6 may be bottomed without being injected at all. When the water in the dock is discharged to the outside water to reach the bottom, it is convenient because it will not be affected even if the tide difference in the outside water is considerably large.
There is no need to evacuate the carrier to a safe place even in the event of typhoon or other storm.

After landing, liquefied gas is discharged from the carrier to the base. When it is discharged, the hull becomes lighter and it tends to move out of the bottom, but the pump is operated during the discharge to drain the water inside the support member to exert a downward suction force and stabilize the wear. Try to keep the bottom. When the delivery of the liquefied gas is completed, the water is discharged from the ballast tank compartment or the water is injected into the dock to float the boat and pull it out of the dock, and again to transport it as a carrier ship.

In a relatively small-scale liquefied gas transportation project, locking the liquefied gas carrier at the base safely and reliably contributes to improvement of cargo handling efficiency, and reliable transportation can be expected throughout the year. Transportation efficiency is improved. Further, as noted above, the carrier could also be used as part of the base's onshore storage tank.

[0014]

[Effect of the Invention] According to the present invention, when the carrier is docked in the dock, it is isolated from the outside water area by the dock walls and doors and is not affected by waves and the carrier itself bottoms on the dock bottom for safety and security. Since it will be locked on the ground, it will contribute to the improvement of cargo handling efficiency and the transportation efficiency of the entire project, and since it has the same level of safety as the onshore structure, The function as a storage tank that bears all or part of the storage capacity can be fully fulfilled.

Since the hull does not move in the connection of the piping between the ship side and the land side, it can be ensured over the period of use as a storage tank.
You can do it safely. And if liquefied gas leaks out of the liquefied gas tank of the carrier due to an accident,
Dock walls and doors can act as a levee that prevents the spread of liquid.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which a carrier is docked in a dock provided at a receiving terminal according to an embodiment of the present invention.

2 is a cross-sectional view of the dock bottom structure taken along the line AA in FIG. 1, showing an example in which a support member is provided on the dock bottom.

FIG. 3 is a cross-sectional view of another dock bottom structure taken along the line AA in FIG. 1, showing an example in which a support member is provided on the dock bottom and a pump is connected to an inner space surrounded by the support member.

FIG. 4 is a cross-sectional view of a carrier ship docked in a dock and floating.

FIG. 5 is a cross-sectional view of a state where the carrier ship bottoms in the dock.

[Explanation of symbols]

 1 ... Receiving base 2 ... Dock 3 ... Entry / exit opening 4 ... Liquefied gas carrier 5 ... Liquefied gas tank 6 ... Ballast tank compartment 7 ... Door 8 ... Support member 9 ... Packing 10 ... Space 11 ... Pump

Claims (1)

[Scope of utility model registration request] 1. A dock for docking a liquefied gas carrier is docked at a receiving terminal, a door for opening and closing an opening / closing opening of the dock is provided, and the entire periphery of the dock is fitted to the bottom shape of the liquefied gas carrier. A liquefied gas carrier, characterized in that a support member is provided, packing is provided on the upper surface of the outer peripheral edge thereof, and a pump for forcibly draining water in the inner space is connected to the space inside the entire peripheral support member. Receiving equipment.