Ship roll damping device

Abstract

To provide a ship's roll damping device that can suppress the tilt of a ship as much as possible. [Solution] The upper part of the hull 1 is provided with a pair of left and right wing tanks 11 and 12 spaced apart in the width direction of the ship, a duct 13 connecting the lower parts of the pair of wing tanks 11 and 12, and a damper 16 that controls the movement of fluid between the pair of wing tanks 11 and 12 through the duct 13. Each of the pair of wing tanks 11 and 12 is equipped with an emergency drainage device 20 consisting of an emergency drainage pipe 21 and an on-off valve 22 interposed in the drainage pipe 21. Since the fluid in the tank can be discharged from either of the left and right wing tanks 11 and 12 through the drainage pipe 21 by opening the on-off valve 22 of the emergency drainage device 20, the weight addition in the direction that increases the tilt of the hull 1 can be eliminated. Therefore, the tilt of the ship S can be suppressed.

Claims

[Claim 1] On the upper deck, which is the uppermost part of the hull, a pair of wing tanks are provided, spaced apart in the width direction of the ship, A duct connecting the lower parts of the pair of wing tanks, It includes a transfer means for controlling the movement of fluid between the pair of wing tanks through the duct, Each of the pair of wing tanks is equipped with an emergency drainage device consisting of an emergency drainage pipe and an on / off valve interposed in the drainage pipe. The drain pipe is attached to the front or rear wall of each of the pair of wing tanks and is configured to draw liquid from the lowest position of each wing tank, and its end opens above the upper deck. The inner diameter of the drain pipe is 200 to 400 mm. The aforementioned on-off valve is a motor-driven butterfly valve that can be remotely operated from the bridge. A ship's roll-damping device characterized by the following features.

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