A ship, a cargo hold of a ship and a method of reducing the transverse moment of grain of a hatchway

By installing inflatable airbags on the hatch covers and coamings of the cargo holds, the problem of insufficient stability of bulk carriers when loading grain has been solved, achieving the effects of reducing heeling moment and increasing loading rate.

CN122211518APending Publication Date: 2026-06-16SHANGHAI MERCHANT SHIP DESIGN & RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI MERCHANT SHIP DESIGN & RES INST
Filing Date
2026-05-12
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

In the existing technology, when bulk carriers are loaded with grain, the grain's scattered and porous nature creates gaps near the hatches, causing the grain to generate a large heeling moment when the ship heels. This affects the ship's stability and loading rate, and fails to meet the new requirements of the International Maritime Organization.

⚗Method used

Inflatable airbags are installed on the hatch covers and hatch coamings of the ship's cargo hold. The airbags are inflated by an air supply device to fill the gaps around the hatch, restricting the movement of grain. Combined with pressure sensors and control devices, automatic monitoring and maintenance are achieved.

🎯Benefits of technology

It effectively reduces the heeling moment of grain, improves the stability and loading flexibility of the vessel, meets international regulatory requirements, and reduces the operational burden on the crew.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a ship, a ship cargo hold and a method for reducing hatchway grain transverse moment, the ship cargo hold is used for loading grain and comprises: a side tank serving as a side plate of the ship cargo hold; an inner bottom plate connected with the side tank and used for bearing the pressure of the grain; a bottom edge tank connected with the side tank and arranged below the inner bottom plate; a top edge tank connected with the top of the side tank, a hatchway is formed in the top edge tank for loading and unloading the grain, hatchway coaming is arranged at both ends of the hatchway, and a hatch cover is movably connected to the hatchway coaming; and a gas bag device comprising at least one gas bag and arranged on a lower cover plate of the hatch cover and / or the hatchway coaming; and a gas supply device connected with the gas bag and used for inflating the gas bag. The application can effectively reduce the grain transverse moving space, significantly reduce the grain transverse moment of the hatchway surrounding area, improve the grain stability of the ship and increase the grain loading flexibility.
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