JP3066019U - Ship's tank - Google Patents

Abstract

(57) [Summary] [Problem] To provide a means for naturally draining (discharging) a liquid accumulated in an air duct or an air vent pipe into a shaking water tank without any need for manual operation. It is characterized in that air in the tank can be vented. SOLUTION: As a drain vent, a drain vent pipe 7 whose upper end is opened in an air duct 5 and whose lower end is opened in a liquid duct 4 is provided. In the vicinity of the center of the drain pipe 7, a valve 9 is provided, and an air vent pipe 8 that allows circulation with the outside air is placed horizontally or
It is provided in a branch shape facing upward.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a damping water tank for reducing the roll of a ship, and more particularly to a countermeasure against accumulated water (drain) that accumulates in an air duct or an air vent pipe of the damping water tank.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, a U-tube type anti-rolling water tank has been known as a method for reducing the roll of a ship. When the liquid in the left and right tanks moves through the liquid duct due to the roll of the ship, the movement of the tank causes a time lag with the roll of the ship, that is, a phase delay. It functions to reduce the roll using the delay. Therefore, as shown in FIG. 3, a pair of at least two tanks 2 and 3 set on both sides of the hull and a liquid duct 4 for moving liquid to the bottom of these tanks are connected to each other to form a rocking water tank. In an attenuated water tank 1 having a U-shaped cross section, an air duct 5 communicating with a valve 6 is provided at the upper part of the tank. The liquid in the tank will be injected and drained as necessary.However, although not shown, a liquid injection pipe, drain pipe, etc., are not shown in the attenuating tank that maintains airtightness as a means of liquid braking. It is provided via a closing device such as.

In addition, when the liquid is injected or drained, it is necessary to take in and out the air in the tank. The air vent pipe 20 is provided with a closing device such as a valve 21. The location of this air vent pipe is generally located at the top of the tank. However, during the voyage, if it becomes necessary to drain or inject the liquid in the tank for any reason, it will be necessary to open and close the air vent valve. Therefore, the danger was pointed out based on the location of the valve operation, and some of them were improved as shown in Fig. 4.

[0004]

[Problems to be solved by the invention]

 When the anti-oscillation tank is activated, the liquid for movement moves in the liquid duct at a speed of about 3 to 5 m / s. Therefore, considerable droplets are generated in the wing tank and repeatedly move in the air duct with air. . For this reason, the droplets accumulate as water stoppage (drain) in the air duct and also in the air vent pipe having the devised shape shown in FIGS. 5 and 6, but there was no problem in terms of the effect of reducing vibration.

[0005] However, for example, in winter or cold regions where the outside air temperature is below freezing, drainage in the pipes freezes and expands during berthing and navigation, and unexpected accidents such as breakage of valves and air vent pipes have continued. Was.

[0006] On the other hand, countermeasures against contamination with antifreeze and the like have been studied, but because of the enormous required amount and the high price, it is avoided in general ships and, depending on the situation, the valve at the corresponding location is opened and drained. Work, such as discharging wastewater. For this purpose, it is necessary to work at night, when the temperature drops for that purpose, and on the aircraft side. Furthermore, discharging the drain out of the tank has a problem that the liquid required for the rocking water tank gradually decreases, so that the liquid must be replenished.

[0007]

【Purpose】

 The present invention has been made to solve such a conventional problem. The air duct and draining (discharging) in the air vent pipe can be naturally circulated in the reduced water tank without any need for labor. In addition, the valve of the air release pipe, which opens and closes as needed, is installed in a place where it can be safely operated, and provides an anti-oscillating water tank that can function as both the air release pipe and the drain.

[0008]

[Means for Solving the Problems]

 The attenuated water tank of the present invention is a closed U-tube type that is connected to a pair of at least two tanks set on both sides of the hull and a liquid duct that moves liquid to the bottom of these tanks. In the water tank, the upper end is placed in the air duct, and the lower end is opened in the liquid duct, and a drain pipe is provided.The drain pipe has a branch pipe that can suck or discharge air, horizontal or horizontal. Install above the horizontal.

[0009]

[Embodiment of the invention]

 The liquid that has flowed into the air duct pipe is naturally discharged into the liquid duct through the drain pipe, so that almost no liquid remains as water stoppage. Accordingly, even in the case of berthing or navigating in winter or a cold area when the outside air temperature is below freezing, it is possible to prevent the occurrence of breakage accidents such as the air vent pipes and valves with a damping tank.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be further described with reference to the drawings. In the rocking water tank 1 shown in FIG. 1, a liquid duct 4 connecting the two tanks 2 and 3 and the bottoms of these tanks is used as a liquid communication means, and is connected to the upper parts of the tanks 2 and 3 via a valve 6. An air duct 5 is provided and integrally formed. The water level 10 (average of right and left) in the attenuated water tank is generally set to about twice the height of the liquid duct as a standard.

A liquid injection pipe 12 and a liquid discharge pipe 11 are provided at appropriate positions in the reduced water tank 1 as means for injecting or discharging the liquid into the reduced water tank 1. The liquid injection pipe 12 and the discharge pipe 11 are provided with valves 13 and 14, respectively. Further, although not shown, a liquid level gauge and a sounding pipe for checking a water level are also provided.

Further, a drain pipe 7 whose upper end is opened in the air duct and whose lower end is opened in the liquid duct 4 is provided as a drain in the air duct 5. In the vicinity of the center of the drain pipe, a closing device such as a valve 9 or a metal flange is provided, and by opening the closing device, the air vent pipe 8 that enables the communication with the outside air is horizontal or horizontal. It is provided in a more upward branch shape. The vertical position of the air release pipe 8 is set so that the lower end of the air release pipe is above the required water level 10 of the water-reducing tank and does not submerge even if the hull is shaken. Make the height suitable.

The reason that the lower end of the air release pipe 8 is determined is that the air in the tanks 2 and 3 is released to the outside air through the air duct 5 and the air release pipe 8. If the lower end of the air release pipe 8 is lower than the water level 10, Because the lower part of the air vent pipe is immersed in the liquid and shuts off the flow of air, the compartments above the water level in the tanks 2 and 3 are in a sealed state without air vent and cannot be poured or drained.

Further, the position of the drain pipe 7 of the present invention in the left-right direction is preferably provided at the center of the hull in the left-right direction as much as possible. As shown in FIG. 2, the more the drain pipes 15 and 16 are located outside the center, the more easily noise is generated from the upper end of the drain pipe 15 and the lower end opening of the air vent pipe 18. However, there is no problem with the shaking efficiency, and there is no restriction on the installation location in the horizontal direction.

When using the reduced water tank 1 in such a configuration, the valve 6 of the air duct 5 and the valve 9 of the air vent pipe 8 shown in FIG. 1 are opened, and the air between the tanks 2 and 3 and the outside air is opened. After the liquid is injected from the liquid injection pipe 12 through a liquid transfer pump or the like to a required water level 10 through a liquid transfer pump or the like, the liquid transfer pump is stopped and the liquid injection pipe 12 is stopped. The operation preparation is completed by closing the valve 14 and the valve 9 of the air vent pipe 8 to make the inside of the vibration-reducing tank 1 airtight.

In order to discharge the liquid in the water tank 1, the valve 6 of the air duct 5 and the valve 9 of the air vent pipe 8 are opened to allow the air to flow freely between the tank and the outside air. Drainage can be achieved by opening the drain valve 13.

[0017]

[Effect of the invention]

 In the air duct during the operation of the anti-oscillating water tank, the splash of air and the splash of air is strong, and the flowing direction is reversed every 1/2 shaking, so that the splash gradually accumulates as liquid, but through the drain pipe. Therefore, since the liquid is discharged into the liquid duct, in other words, into the tank, the following effects can be obtained.

(1) The liquid accumulated in the air duct can always be naturally discharged. (2) Since the discharged liquid returns to the rocking water tank, the liquid in the tank is always constant and does not need to be refilled. (3) Since the air vent pipe is provided horizontally or upward, the possibility of the liquid being in a water stop state is reduced. (4) The air vent tube can be easily manufactured without having a complicated shape with a bend or the like. (5) The air vent pipe can be installed near the center of the water tank, which is easy and safe to open and close the valve. Although the present invention has a very simple idea of using both the air release pipe and the drain pipe, the operation position of the drain pipe does not need to be troublesome, and even if the air release pipe is opened for some reason, the operation position is not changed. It is a safe place and can be expected to be extremely effective as a measure against damage to valves and other damage caused by freezing of liquid in the pipes in an air vent pipe with a damping tank that can occur in winter.

[Brief description of the drawings]

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

FIG. 2 is a view showing an embodiment of a mounting position of a drain pipe according to the present invention;

FIG. 3 is a general configuration diagram of a conventional rocking water tank.

FIG. 4 is an embodiment diagram of a conventional air vent tube.

FIG. 5 is a diagram showing the state of stored water in a conventional air vent pipe.

FIG. 6 is a diagram showing the state of stored water in a conventional air vent pipe.

[Explanation of symbols]

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wobble tank 2、3 ・ ・ ・ ・ ・ ・ ・ ・ ・ Tank (wing tank) 4 Liquid duct (duct for moving liquid) 5 Air duct (air communication pipe) 7, 15, 16 ... drain drain pipe 8, 17, 18, 20, 22, 24, 27 ... air drain pipe (in / out pipe) 10, ..., water level (liquid level) 6, 9, 13, 14, 19, 21, 23, 25, 28
・ Valve (closing device) 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ Drain pipe 12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Injection pipe 26, 29, 30 Drain

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[Procedure amendment]

[Submission date] August 20, 1999 (1999.8.2
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (1)

[Utility model registration claims] 1. A pair of at least two marine vessels set on both sides of a hull
And two tanks (2, 3) connected by a liquid duct (4) for transferring liquid to the bottom of these tanks, and an air duct (5) in an airtight rocking water tank (1) formed in a U-tube shape. A drain pipe (7) having an upper end opened in the air duct (5) and a lower end opened in the liquid duct (4) is provided as a drain in (). A closing device such as a valve (9) or a flange is provided on the drain tube (7), and by opening the closing device, an air bleed tube (8) that allows communication with the outside air is branched. By providing in
An anti-oscillation water tank for ships, which is used for both draining and air bleeding when pouring and draining liquid in the tank.