Seawater emptying method for ship ballast tank

Abstract

The invention discloses a seawater emptying method for ship ballast tank ship ballast tank seawater emptying method, adopts a specially-made ship ballast tank seawater emptying tool and comprises a cover plate body, cover plate connecting angle steel, a cabin penetrating compound plate, compound plate connecting angle steel and a ballast water pipe, a through hole is formed in the cabin penetrating compound plate, and the ballast water pipe is welded to the lower end face of the cabin penetrating compound plate; a water inlet of the ballast water pipe is communicated with a through hole in thecabin penetrating compound plate, an installation hole is formed in a cabin bottom plate of the ballast cabin, the cabin penetrating compound plate is connected with the cabin bottom plate in a welded mode, the cabin penetrating compound plate is located on the inner side of the ballast cabin, and compound plate connecting angle steel is welded to the upper end face of the cabin penetrating compound plate in the circumferential direction of the cabin penetrating compound plate; cover plate connecting angle steel is welded to the lower end face of the cover plate body in the circumferential direction of the cover plate body, and the cover plate connecting angle steel is fixedly connected with the compound plate connecting angle steel. The device is simple in structure, convenient to use and suitable for the side ballast tank of the large container ship, and seawater in the ballast tank can be fully emptied.

Description

technical field [0001] The invention belongs to the technical field of ship piping system design, and in particular relates to a seawater emptying method of a ship's ballast tank. Background technique [0002] On ships, especially large container ships, there are many ballast tanks, most of which can be divided into bottom ballast tanks and side ballast tanks. Sea water in empty ballast tanks. The usual practice is to use ballast pumps to pump out most of the seawater first, and then use jet pump stripping mode to pump out the remaining seawater when the liquid level in the tank is low. The traditional suction pipe is arranged from top to bottom, and the suction pipe There is a certain distance between the water suction port of the ballast tank and the inner bottom plate of the ballast tank. When the water in the ballast tank is lower than the water suction port, the seawater in the ballast tank will not be pumped out, which will cause the seawater to stay in the tank. Lar...

AI Technical Summary

Problems solved by technology

The usual practice is to use ballast pumps to pump out most of the seawater first, and then use jet pump stripping mode to pump out the remaining seawater when the liquid level in the tank is low. The traditional suction pipe is arranged from top to bottom, and the suction pipe There is a certain distance between the water suction port of the ballast tank and the inner bottom plate of the ballast tank. When the water in the ballast tank is lower than the water suction port, the seawater in the ballast tank will not be pumped out, which will cause the seawater to stay in the tank. Larger, the quality of the retained seawater is also large

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