Container ship ballast tank vent pipe design method

Abstract

The invention relates to a container ship ballast tank vent pipe design method which comprises the following steps that S1, whether the problem that a vent pipe at the highest position of a ballast tank cannot be installed or needs to penetrate through other ballast tanks exists or not is judged according to the position of the ballast tank, and if yes, vent boxes are arranged in front of and behind the ballast tank in an extending mode; the upper end face of the ventilation box is flush with the highest position of the ballast tank and communicated with the ballast tank, and a ventilation pipe is installed on the upper end face of the ventilation box. S2, in order to facilitate arrangement of ventilation pipelines, the ventilation boxes are arranged in the transverse bulkheads or the channels; S3, according to the sectional area A1 of the ballast tank injection pipe, the needed total sectional area A2 of the vent pipe is selected, and A2 is guaranteed to be larger than or equal to 1.25 * A1. According to the design method, the problem that in the original design, the vent pipe is difficult to arrange at the highest point of the ballast tank is solved, the problems that communication between the ballast tanks and local suffocation of the ballast tank are possibly caused when the vent pipe in the original design needs to penetrate through other ballast tanks are solved, and themounting difficulty of the vent pipe is reduced.

Description

technical field [0001] The invention relates to the field of ship design, in particular to a method for designing a vent pipe in a ballast tank of a container ship. Background technique [0002] During the normal operation of the ship, the ballast tank needs to be ballasted and discharged. In order to balance the atmospheric pressure inside and outside the tank, the ballast tank must be equipped with a ventilating pipeline. The ventilating pipeline should be arranged at the highest point of the ballast tank. Location. The regulations of Bureau Veritas (BV) and American Bureau of Shipping (ABS) require that at least two ventilation pipes should be installed in the ballast tank, and the distance between the two ventilation pipes should be as far as possible; When the length of the ballast tank is greater than 7 meters, ventilation pipes are to be provided at the bow and stern of the ballast tank. [0003] For container ships, ballast tanks are divided into side ballast tanks...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a method for designing the ventilation pipe of the ballast tank of a container ship, which overcomes the fact that the ventilation pipe cannot be arranged at the highest position of the ballast tank in the original design, the ventilation pipe needs to pass through other ballast tanks and the arrangement of the ventilation pipe Difficult problem, technical purpose of the present invention is achieved by the following technical solutions:

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