Combined type front mast serving as liquefied natural gas ventilation mast

Abstract

The invention provides a combined front mast serving as a liquefied natural gas ventilation mast, and relates to the technical field of ultra-large container ships. The combined front mast comprises:a main mast body fixed in the middle area of a head mooring deck through a root reinforcing structure; an upper-layer platform which is arranged at the top of the main mast body, wherein an explosion-proof navigation indicating device is arranged on the upper-layer platform; a lower-layer platform which is arranged in the middle of the main mast body, wherein a plurality of electrical devices arearranged on the lower-layer platform; at least one vent pipe which is connected with the main mast body through a pipeline supporting structure, wherein the vent pipe penetrates through the upper-layer platform and the lower-layer platform; a ventilation cap whcih is arranged at the top end of the ventilation pipe and located above the upper-layer platform; a first straight ladder which is arranged in the main mast body and located between an upper deck and a lower platform of the dual-fuel ultra-large container ship; and a second vertical ladder which is arranged outside the main mast body and is positioned between the lower-layer platform and the upper-layer platform. Meanwhile, the functional requirements of front mast electrical equipment and a liquefied natural gas ventilation mast are met, and the construction cost is greatly saved.

Description

technical field [0001] The invention relates to the technical field of ultra-large container ships, in particular to a combined fore-mast which doubles as a liquefied natural gas venting mast. Background technique [0002] In order to comply with the increasingly stringent emission requirements of the International Maritime Organization (IMO), using liquefied natural gas (LNG) as a marine fuel is a realistic and feasible solution. At present, there are ultra-large container ships that use LNG as the main fuel, and arrange LNG storage tanks on board. [0003] For conventional ultra-large container ships, the front mooring deck area will be equipped with a front mast to arrange electrical equipment such as radar, searchlights, front mast lights and anchor lights, and the front mast is embedded in the wave wall structure. For ships with LNG storage tanks, it is necessary to install a vent mast. Its main function is to discharge natural gas or nitrogen discharged from the safet...

AI Technical Summary

Problems solved by technology

However, due to the large danger area of ​​the vent cap, the location of the superstructure area may lead to a series of electrical equipment in the superstructure area that may need to be explosion-proof, which will greatly increase the construction cost. Therefore, it is optimal to place the vent mast on the first mooring deck area. According to the risk assessment requirements of the classification society, the position of the vent cap should be at least 10m away from the edge of the container at the head, so the vent mast should be arranged in the middle area of ​​the mooring deck at the head

[0005] In the prior art, by designing the structure of the foremast and the wave wall together, and arranging the ventilation mast in the middle area of ​​the mooring deck of the bow, the functional requirements of the foremast and the LNG ventilation mast can be met, but the overall shape is unsightly and causes construction problems. greatly increased cost

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