KR20160069637A - Anti-rolling Tank - Google Patents

Abstract

Provided is an anti-rolling tank. The anti-rolling tank comprises: a first ballast tank installed in a left side of a ship; a second ballast tank installed under the first ballast tank; a third ballast tank having the same height as the second ballast tank and installed in a right side of the ship; a fourth ballast tank installed on the third ballast tank; a first pipe connected between the first ballast tank and the third ballast tank; and a second pipe connected between the second ballast tank and the fourth ballast tank. When the ship is inclined toward the left, ballast in the first ballast tank moves to the third ballast tank due to its own load. On the other hand, when the ship is inclined to the right, ballast in the fourth ballast tank moves to the second ballast due to its own load. The anti-rolling tank effectively reduces sideway rolling of a ship in response to motion of the ship.

Description

Anti-rolling Tank

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a tilting reduction tank, and more particularly, to a tilting reduction tank that quickly responds to hull movement and efficiently reduces rolling of the hull.

The cargo ship is operated with the ballast tank containing seawater in order to improve the operation, balance and stability of the propeller and rudder in the water when there is not enough shipping cargo. In general, Ballast Water. The ballast water is a weight to be loaded to control the draft and trim of the ship. This function improves the stability and stability of the ship. If the ship is not fully loaded, In order to effectively operate the system.

Ballast water has been in use since the late 1870s when ships began to be constructed of steel. In some cases, ballast is used as ore or sand as ballast without loading ballast water depending on the vessel, but today, using sea water or fresh water as ballast It is universal.

In general, the ship is subject to many rolling and pitching movements in the left, right, front, and back directions due to waves during the navigation, minimizing the effects of such rocking and swaying, And a ballast water reducing tank for storing the ballast water to maintain the ballast water.

The transverse vibration reduction tank reduces the transverse vibration and longitudinal vibration by using the phase difference between the vibration of the hull and the movement of the sea water. The conventional transverse vibration reducing tank is installed to be transversely connected to the inside of the hull, Respectively. Therefore, the conventional rolling reduction tank controls the rolling of the hull by moving the ballast water to the port side and the starboard side of the hull in response to the rolling motion of the hull.

However, the conventional transverse vibration reduction tank has a problem that it occupies 1 to 4% of the amount of displacement including seawater in the tank, and since the tanks are formed in a continuous structure connected to each other, There is a problem in that there is a limit in accurately coping with the workload and the workload.

As a conventional technique for overcoming this limitation, there is a stand-alone anti-rolling tank of Korean Patent Laid-Open No. 10-2012-0135246. In accordance with the present invention, a pair of independent tank bodies are installed in the forward and aft portions of the ship, respectively, and the ballast water is selectively introduced into the tank body at the lower portion of the tank body in accordance with the transverse and longitudinal vibration of the ship Or a pump capable of discharging it, respectively.

However, even in the case of such a stand-alone anti-rolling tank, since the ballast water is supplied or discharged by using the pump, there is a problem that it is difficult to immediately respond to the movement of the hull.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a horizontal rocking reduction tank which is configured such that the ballast water can be automatically moved by its own weight in the event of occurrence of lateral rocking of the ship.

According to an aspect of the present invention, there is provided a ballast tank comprising: a first ballast tank installed on a port side of a hull; A second ballast tank installed below the first ballast; A third ballast tank installed on the starboard side of the ship at the same height as the second ballast tank; A fourth ballast tank installed on the third ballast tank; A first pipe connecting the first ballast tank and the third ballast tank; And a second pipe connecting the second ballast tank and the fourth ballast tank, wherein when the hull is inclined toward the port side, the ballast water in the first ballast tank is discharged into the third ballast tank by its own weight And the ballast water inside the fourth ballast tank moves into the second ballast tank by its own weight when the hull is inclined toward the starboard side.

Wherein the lateral rocking reduction tank comprises: a first valve installed at a connection portion between the first ballast tank and the first pipe; And a second valve installed at a connecting portion between the fourth ballast tank and the second pipe, wherein the first valve can be automatically opened when the hull is inclined toward the port side, and the second valve The first valve and the second valve can be automatically closed if the hull is not tilted.

The first ballast tank and the fourth ballast tank may be filled with ballast water when the rolling motion of the hull is not required to be reduced and the second ballast tank and the third ballast tank may be partially filled with ballast water .

Wherein the transverse rock reduction tank comprises: a first pump for pumping ballast water in the second ballast tank into the first ballast tank; And a second pump for pumping the ballast water in the third ballast tank into the fourth ballast tank.

According to another aspect of the present invention, when the hull is inclined toward the port side, the ballast water in the ballast tank installed on the upper side of the port side shifts into the ballast tank installed in the lower portion of the starboard side. When the hull is inclined toward the starboard side, The ballast water in the ballast tank installed in the upper portion moves into the ballast tank installed in the lower portion of the port side and the ballast water moves by the difference in height of the ballast tank and the own weight of the ballast water.

According to the transverse vibration reduction tank of the present invention, since the valve is automatically opened by sensing the ship's heeling and the ballast water is instantaneously moved by its own weight, It is possible to reduce the rolling motion of the motor.

1 is a side view schematically showing a closed state of a valve of a transverse vibration reducing tank of a preferred embodiment of the present invention.
Fig. 2 is a side view schematically showing the valve of the transverse vibration reducing tank of the preferred embodiment of the present invention in an open state.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The transverse vibration reduction tank of the present invention is applicable to general ships such as bulk carriers, but is preferably applied to drillships. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

Fig. 1 is a side view schematically showing a valve closed state of a rolling reduction tank according to a preferred embodiment of the present invention, Fig. 2 is a side view schematically showing a state of a valve of a rolling reduction tank of the preferred embodiment of the present invention to be.

Referring to Figs. 1 and 2, the rolling reduction tank 100 of the present embodiment includes four ballast tanks 110, 120, 130, and 140; Two pipes 310, 320 installed to cross each other; Two valves 210 and 220 respectively installed at connection portions of the ballast tanks 110 and 140 installed above the pipes 310 and 320; And two pumps 410 and 420 for pumping the ballast water from the lower ballast tanks 120 and 130 to the upper ballast tanks 110 and 140.

The transverse vibration reducing tank 100 of the present embodiment includes four ballast tanks 110, 120, 130, and 140. The second ballast tank 120 is located below the first ballast tank 110 and the third ballast tank 130 is located on the side of the second ballast tank 120 and the third ballast tank 130 is located above the third ballast tank 130. [ 4 ballast tank 140 is located.

The first to fourth ballast tanks 110, 120, 130, and 140 are installed so as to surround the empty space in the center, and pipes 310 and 320 are installed in the empty space in the center. The first ballast tank 110 and the third ballast tank 130 are connected to each other by the first pipe 310 and the second ballast tank 120 and the fourth ballast tank 140 are connected to the second pipe 320 Lt; / RTI >

Each of the ballast tanks 110, 120, 130 and 140 is isolated from each other so that the ballast water can not move to the other ballast tanks and only the ballast tanks Can be moved.

A first pump 410 is installed between the first ballast tank 110 and the second ballast tank 120 and a second pump 420 is installed between the third ballast tank 130 and the fourth ballast tank 140. [ Respectively. The first ballast tank 110 and the fourth ballast tank 140 are filled and the second ballast tank 120 and the third ballast tank 130 are partially filled up unless the purpose is to reduce rolling of the hull The pumps 410 and 420 serve to fill the first and fourth ballast tanks 110 and 140 by pumping ballast water in the tanks of the second and third ballasts 120 and 130.

The pipes 310 and 320 of this embodiment provide a path through which the ballast water can travel.

One end of the first pipe 310 is connected to the first ballast tank 110 and the other end of the first pipe 310 is connected to the third ballast tank 130. When the hull is inclined toward the port side, The ballast water in the tank 110 quickly flows into the third ballast tank 130 via the first pipe 310. [ The amount of ballast water in the second ballast tank 120 and the ballast water in the fourth ballast tank 140 is maintained and the ballast water in the third ballast tank 130 is discharged to the outside as the ballast water in the first ballast tank 110 decreases The overall effect is to reduce the inclination of the ship by twice the flow rate of the moving ballast water.

One end of the second pipe 320 is connected to the fourth ballast tank 140 and the other end of the second pipe 320 is connected to the second ballast tank 120. When the hull is inclined toward the starboard side, The ballast water in the tank 140 quickly flows into the second ballast tank 120 through the second pipe 320. [ The amount of ballast water in the first ballast tank 110 and the ballast water in the third ballast tank 130 is maintained and the ballast water in the second ballast tank 120 is reduced as the ballast water in the fourth ballast tank 140 decreases The overall effect is to reduce the inclination of the ship by twice the flow rate of the moving ballast water.

In the event that the hull is tilted to the port or starboard, the ballast water can be discharged from the ballast tanks (110, 140) at a higher position due to its own weight to the ballast tanks (130, 120) at lower positions without pumping the ballast water by the pump It is possible to quickly reduce the rolling motion of the hull.

The valves 210 and 220 of the present embodiment include a connecting portion between the first ballast tank 110 and the first pipe 310; And the connecting portion of the fourth ballast tank 140 and the second pipe 320, respectively.

The valves 210 and 220 automatically open and close by sensing the inclination of the hull.

Specifically, when the hull is inclined toward the port side at a predetermined angle (hereinafter, referred to as?), The first valve 210 is automatically opened. When the first valve 210 is opened, The ballast water of the third ballast tank 130 is instantaneously moved through the first pipe 310 into the third ballast tank 130 by its own weight. The first valve 210 automatically closes and the ballast water in the first ballast tank 110 no longer moves when the inclination of the hull to the port side becomes less than theta.

Further, when the hull is inclined toward the starboard side by more than?, The second valve 220 is automatically opened. When the second valve 220 is opened, the ballast water in the fourth ballast tank 140 is instantaneously moved into the second ballast tank 120 by the second pipe 320 due to its own weight. The second valve 220 automatically closes and the ballast water in the fourth ballast tank 140 is no longer moved when the skew of the hull is less than theta.

The pumps 410 and 420 of the present embodiment are installed to move the ballast water from the ballast tanks 120 and 130 located at the lower side to the ballast tanks 110 and 140 located at the upper side when there is no need to reduce the rolling of the ship, do. Specifically, the first pump 410 is installed between the first ballast tank 110 and the second ballast tank 120, and the first pump 410 is provided between the first ballast tank 110 and the second ballast tank 120, 1 ballast tank (110). The second pump 420 is installed between the third ballast tank 130 and the fourth ballast tank 140 so that the ballast water inside the third ballast tank 130 is discharged to the fourth And is then pumped into the ballast tank 140.

When the ballast water is moved from the first or fourth ballast tanks 110 and 140 to the third or second ballast tanks 130 and 120 for the purpose of reducing rolling of the hull, the first or fourth ballast tanks 110 and 140, Since the ballast water inside is reduced, it may become impossible to prepare for the subsequent hull transverse. Therefore, it is necessary to return the ballast water in the second or third ballast tanks 120, 130 back into the first or fourth ballast tanks 110, 140 to fill the first or fourth ballast tanks 110, 140 In this case, it is not necessary to react immediately to the movement of the hull, unlike the case of reducing the rolling motion of the hull, so the pumps 410 and 420 may be used.

According to the present invention, the ballast water can be moved by the valves 210 and 220 which are opened and closed automatically by sensing the tilting of the ship, and the ballast water can be transported to the pipes 310 and 320 by its own weight, So that it is possible to quickly reduce the rolling of the hull.

The transverse vibration reducing tank of the present invention may be installed between a coffer dam or a partition wall of a ship.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

100: transverse vibration reducing tank 110, 120, 130, 140: ballast tank
210, 220: valve 310, 320: pipe
410, 420: pump

Claims (5)

A first ballast tank installed on a port side of the hull;
A second ballast tank installed below the first ballast;
A third ballast tank installed on the starboard side of the ship at the same height as the second ballast tank;
A fourth ballast tank installed on the third ballast tank;
A first pipe connecting the first ballast tank and the third ballast tank; And
And a second pipe connecting between the second ballast tank and the fourth ballast tank,
The ballast water in the first ballast tank moves into the third ballast tank by its own weight when the hull is inclined toward the port side,
And the ballast water in the fourth ballast tank moves into the second ballast tank by its own weight when the hull is inclined toward the starboard side. The method according to claim 1,
A first valve installed at a connection portion between the first ballast tank and the first pipe; And
And a second valve installed at a connection portion between the fourth ballast tank and the second pipe,
Wherein the first valve is automatically opened when the hull is inclined toward the port side,
The second valve is automatically opened when the hull is inclined toward the starboard side,
Wherein the first valve and the second valve are automatically closed when the hull is not tilted. The method according to claim 1,
When it is not necessary to reduce the rolling of the hull,
Wherein the first ballast tank and the fourth ballast tank are filled with ballast water,
Wherein the second ballast tank and the third ballast tank are partially filled with ballast water. The method of claim 3,
A first pump for pumping the ballast water in the second ballast tank into the first ballast tank; And
A second pump for pumping the ballast water in the third ballast tank into the fourth ballast tank;
Further comprising: a transverse vibration reducing tank. When the hull is inclined toward the port side, the ballast water in the ballast tank installed on the upper side of the port side moves into the ballast tank installed on the lower side of the starboard side,
When the hull is inclined toward the starboard side, the ballast water inside the ballast tank installed on the upper side of the starboard side moves into the ballast tank installed on the lower side of the port side,
The ballast water is moved by the height difference of the ballast tank and the own weight of the ballast water.

Images