An air compressor ballast semi-submersible ship ballast tank submersion auxiliary system and method

Abstract

The invention relates to a submergence assisting system for water ballast tanks of an air compressor ballast semi-submerged ship. The system adopts the structure that a ballast make-up water pump is additionally arranged in a ballast adjusting system for the water ballast tanks of the air compressor ballast semi-submerged ship; an overflow collecting pipe, an overflow alarm and an overflow cabin are arranged at the end, near an air compressor, of a water ballast tank vent pipe; the water inlet end of the ballast make-up water pump is connected with seawater tanks; the water outlet end of the ballast make-up water pump is connected with all the water ballast tanks through make-up water adjusting valves; an overflow adjusting valve is arranged in front of the overflow collecting pipe, and communicated with the overflow cabin through the overflow alarm; the overflow alarm is triggered when receiving an overflow signal, and is stopped when receiving an overflow end signal. The system has the key advantages that make-up water facilities for an air compressor ballast system are arranged, that is, the make-up water pump, the overflow collecting pipe, the overflow alarm and other corresponding pipes are arranged, so as to ensure the water ballast tanks can be fully filled with seawater in any working conditions; compared with the prior art, the system provided by the invention can enable the water ballast tanks to be fully filled with seawater, and completely avoid hidden troubles in the ship draught and ship stability caused by the situation that the water ballast tanks cannot be fully filled with seawater.

Description

technical field [0001] The invention relates to a semi-submersible ship, in particular to an auxiliary system and method for submerging a ballast water tank of a semi-submersible ship with an air compressor, and belongs to the technical field of ballast water tanks of a semi-submersible ship. Background technique [0002] Semi-submersible ships often use air compressors to fill and drain ballast tanks due to the need to achieve rapid surfacing and diving functions. [0003] The schematic diagram of the compressed air discharge and ballast system of a semi-submersible ship that uses an air compressor to fill and drain the ballast tank is shown in the figure below. figure 1 shown. Taking ballast tank 1 as an example, when the ship floats, open the sea valve QD01 and ballast valve QD02 of ballast tank 1, and the air compressor injects compressed air into ballast tank 1. Since the air pressure at the outlet of the air compressor is greater than The pressure of the seawater at ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: during the water injection process of the existing air compressor ballasting the ballast tank of a semi-submersible ship, the water accumulation in the vent pipe is blocked, resulting in the blockage of the suction air path of the air compressor, and the upper suction Insufficient negative pressure makes it difficult to inject water into the ballast tank through the sea pipe at the bottom, which in turn causes the ship to fail to reach the design draft and cause ballast water to slosh in the tank due to the inability to fill the ballast tank with ballast water, endangering the safety of the ship

[0009] In view of the problem existing in the air ballast pipeline of semi-submersible ships

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