JPH0656077A - Anti-rolling tank for ship - Google Patents

Abstract

PURPOSE:To provide a detachable anti-rolling tank which can be built, contracted and housed, and applicable to not only a middle size ship but also a small size ship without giving an influence to gross tonnage and deadweight. CONSTITUTION:In an airtight anti-rolling tank constituted by integrally formula at least two tanks 2, 3 for partly storing liquid and a liquid duct 4 for connecting these tanks 2, 3 with a flexible material, when the tank is used, air and liquid are injected/discharged to/from the inside of the anti-rolling tank from a liquid filling pipe 5 and an air filling pipe 8, to enlarge the tank expanded to also open a valve 11 of an air duct 10 in upper parts of the tanks 2, 3, and to enable the liquid in the inside to move in accordance with rolling. At unnecessary time, by discharging the air and liquid from a predetermined air bleed pipe 7 and liquid discharge pipe 6, the tank is contracted and stored.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-sway water tank for reducing rolling of a ship, and more particularly to an anti-sway water tank capable of contracting and storing and suitable for a small boat.

[0002]

2. Description of the Related Art Conventionally, in order to reduce the rolling motion of a ship, a large ship is provided with a U-tube type rocking water tank 20 as shown in FIG. This shaking water tank is a water tank on the left and right
When the waters 1 and 22 move through the communication part 23 due to the rolling motion of the ship, the motion causes a horizontal shift and a time lag, and therefore functions to control the lateral motion.
The more the position moves away from the center of rolling or the center of gravity of the ship in the vertical direction, the greater the effect of reducing vibration. Such an anti-swing water tank is one of the legal equipment for car ferry that sails in coastal areas, and is usually made of steel plate as part of the hull 30 in the section under the deck near the center of the hull or on the deck. Is fixedly installed.

[0003]

However, there is a drawback in that such an anti-vibration device is required during stormy weather and is not removable even when it is unnecessary during calm weather of the sea. In addition, small vessels are more swaying than waves of medium-sized vessels because of the greater sway, and there is a high need for an agitating water tank. Can only be used on medium-sized ships.
In other words, the gross tonnage, which is a numerical value that represents the size of a ship, is the basis of the ship's facilities, the qualifications of crew and the number of personnel, taxes, etc., but it is generally a problem that cannot be easily removed. Since the internal volume of the structure is the target of the calculation, when installing a damping water tank on the upper deck, the volume will be included in the total tonnage. In addition, when the anti-sway water tank is installed under the deck, there is a problem that the cargo hold volume is reduced by that much and the cargo load is reduced accordingly. Especially, in the case of a ship such as a fishing boat, which has a considerable distance to the fishing ground and must load a large amount of fuel, and on the way back, it cannot be equipped with anything other than fishing gear due to the large amount of fish caught. Despite the high need, it was not possible to equip a shaking tank. In addition, since the shipping fee for transporting the conventional anti-sway water tank is expensive, the shipbuilding manufacturer purchases only the drawings from the anti-sway water tank manufacturer and manufactures each item at the shipyard. Mass production is not possible, leading to an increase in manufacturing costs.

[0004]

[Purpose] The present invention has been made to solve such conventional problems, and is removable, and can be applied to not only medium-sized ships but also small-sized ships without affecting the gross tonnage and cargo weight. It is an object of the present invention to provide an anti-sway water tank that can be assembled, contracted and stored.

[0005]

SUMMARY OF THE INVENTION The rocking water tank of the present invention which achieves such an object has at least two water tanks for partially storing liquids, and liquid communication means for communicating the liquids in these water tanks. An airtight anti-vibration water tank integrally formed with a flexible material, including an inlet / outlet pipe for pouring and injecting air and liquid into the anti-vibration water tank, and a valve for air in the two water tanks. It is possible to expand and expand or contract by injecting or discharging air and liquid from the inlet / outlet pipe.

[0006]

[Operation] The anti-sway water tank, which is made of a flexible material and has a size and shape according to the size of the ship to which it is applied, is used when it is not necessary when the weather is calm or when the ship is sailing. Fold it with no air or water in it and keep it on board for storage. When the weather is bad or the fishery is working, it is installed at a predetermined place of the ship to inject a predetermined amount of water from the liquid injection pipe and inflate and expand by injecting air from the air injection pipe. If you open the air valve, air and water can freely flow between the two tanks, so the water moves between both tanks with a predetermined time lag depending on the shaking of the ship,
This suppresses the rolling of the ship. When the shaking water tank is no longer needed, drain water and air from the drainage pipe and the air vent pipe, fold it back as before, and store it.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be further described below with reference to the drawings. The shaking water tank 1 of FIG. 1 is made of a flexible material such as rubber or synthetic resin, and has two wing tanks (hereinafter, referred to as tanks) 2 and 3 and a liquid transfer mechanism that connects the bottoms of these tanks 2 and 3. Duct (hereinafter referred to as liquid duct)
4 is integrally formed as a liquid communication means. As the flexible material forming the shaking water tank 1, a material and a thickness that can withstand the pressure (usually slightly higher than atmospheric pressure) in the shaking water tank 1 and the shock due to the movement of the liquid are used. The liquid in the shaking water tank 1 passes through the liquid duct 4 to the left and right tanks 2, 3
You can move between them.

Injecting liquid and air into the shaking water tank 1,
For discharging, a liquid injection pipe, a drainage pipe, an air injection pipe, and an air vent pipe are provided at appropriate places in the shaking water tank 1. In this embodiment, the air injection pipe 5 and the drainage pipe 6 are provided in the tank 2, and the air vent pipe 7 and the liquid injection pipe 8 are provided in the tank 3. The liquid injection pipe 5, the drainage pipe 6, the air vent pipe 7, and the air injection pipe 8 are provided with unillustrated valves and the like, and the rocking water tank 1 can be kept airtight by closing these valves. A pressure indicator 9 for displaying the pressure in the tank 2 is attached to the tank 2 so that it is possible to monitor whether or not the amount of air injected into the tank is proper and whether or not there is an air leak. There is.

Further, an air duct 10 which is an air communication pipe is provided on the upper side of each of the tanks 2 and 3.
The air above 3 is moved through this air duct 10 to allow movement of the liquid in tanks 2, 3. The air duct 10 is detachably attached to the damping water tank body, and can be removed when the damping water tank 1 is folded. Further, the air duct 10 has a valve 11
Is installed and both tanks 2, 3 are installed if necessary.
Shut off the air flow.

In such a structure, when the anti-sway water tank 1 is used, as shown in FIG. 2, the liquid level of the liquid such as water is first about twice as high as that of the liquid duct 4 through the liquid injection pipe 8. After the injection is completed, the valve of the injection pipe 8 is closed. Next, air is injected from the air injection pipe 5 until the shaking water tank 1 forms a desired tank shape. At this time, the air pressure in the shaking water tank 1 is set to be slightly higher than the atmospheric pressure. As a result, the shaking water tank 1 can maintain the tank shape due to its internal pressure. This situation is monitored by the pressure indicator 9.

When the shaking water tank 1 is not in operation, the air duct 1
The valve 11 of 0 is closed, the flow of air in the tanks 2 and 3 connected by the air duct 10 is shut off, and the vacant spaces above the liquid level are independent for each tank 2 and 3. Therefore, in this case, the upper side of each of the tanks 2 and 3 is airtight, and the liquid in the tank cannot move even if the hull 30 sways as shown in FIG.

When the rocking water tank 1 is operated, the valve 11 of the air duct 10 is opened as shown in FIG. In this case, since the air in both tanks 2 and 3 can freely move through the valve 11, the liquid also moves in response to the rolling of the hull, and the rolling of the hull is suppressed by the delay in the movement. You can In this case, almost the same pressure is applied to the entire water tank, so that the water tank is not deformed. Therefore, it is possible to obtain the same vibration damping effect as that of the steel plate damping water tank.

When not in use, the air duct 10 is removed, the valves of the air vent pipe 7 and the drain pipe 6 are opened to discharge air and liquid, and the antisway water tank 1 is contracted.
It can be folded and stored as needed. It should be noted that, as shown in FIGS. 5 and 6, the rocking water tank 1 can be provided with a reinforcing wall portion 12 at a position where it does not interfere with the movement of liquid or air in the rocking water tank 1. The wall 12 may be provided with holes 12a to facilitate the movement of the liquid. In FIG. 5, 1
Although one tank 12 is provided for each tank, the wall 12
Can be provided in a part of the liquid duct 4, and can be increased depending on the scale of the ship in which the shaking water tank 1 is installed.

Further, it goes without saying that a reinforcing strip plate 13 made of steel or reinforced plastic or the like and a lashing device as shown in FIG. 7 may be provided outside the shaking water tank. In addition, high-pressure gas may be used as the air injected into the shaking motion water tank 1.

[0015]

As is apparent from the above description, since the anti-sway water tank of the present invention is made of a flexible material, it is lighter than the conventional steel apparatus and easy to carry, and if necessary, It can be attached, removed, stored, etc. Moreover, since it can be easily installed, removed, stored, etc., it can be installed even on a small ship with a small total tonnage, and it can increase the loading capacity of cargo and catches and improve the operating rate. Furthermore, since the anti-sway water tank of the present invention can be mass-produced in accordance with the size and shape of the hull, product inspection and confirmation tests can be easily performed at low cost.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a shaking water tank of the present invention.

FIG. 2 is a cross-sectional view of the damping water tank of the present invention.

FIG. 3 is a cross-sectional view during operation of the rocking water tank of the present invention.

FIG. 4 is a sectional view of the anti-swing water tank of the present invention during operation.

FIG. 5 is a perspective view showing another embodiment of the damping water tank of the present invention.

FIG. 6 is a view showing a wall portion for reinforcing the anti-sway water tank of the present invention.

FIG. 7 is a view showing a strip plate for reinforcing the anti-sway water tank of the present invention.

FIG. 8 is a view showing a conventional shaking water tank.

[Explanation of symbols]

 1 ・ ・ Vibration water tank 2, 3 ・ ・ ・ ・ ・ ・ Tank (water tank) 4 ・ ・ ・ ・ ・ ・ Liquid duct (liquid communication pipe) 5 ・ ・ ・ ・ ・ ・ Liquid injection pipe (inlet / outlet pipe) ) 6 ・ ・ Drainage pipe (inlet / outlet pipe) 7 ・ ・ ・ ・ ・ ・ Air vent pipe (inlet / outlet pipe) 8 ・ ・ ・ ・ ・ ・ Air injection pipe (inlet / outlet pipe) 10 ・ ・ ・ ・ ・ ・ Air Duct (air communication pipe) 11 ... Valve

Claims (1)

[Claims] 1. At least two for partially containing a liquid
A watertight shaking water tank which is integrally formed of a flexible material with two water tanks and a liquid communication means for communicating the liquids in these water tanks. Air and liquid are poured into and out of the shaking water tank. An inlet / outlet pipe and an air communication means for communicating the air in the two water tanks via a valve, and the expansion and expansion or the contraction can be performed by injecting or discharging the air and the liquid from the inlet / outlet pipe. An agitated water tank for ships characterized by: