Fixed ballast of cement steel shot mixture

Abstract

The invention relates to the technical field of ship manufacturing, in particular to a fixed ballast of a cement steel sand mixture, which comprises cement, fresh water and steel shot. Cement, steel shot and water are evenly mixed and stirred in a certain proportion and then filled into an empty cabin at the bottom of the ship in time. The fixed ballast of the cement steel shot mixture has the advantages that 1.the density and the strength of the cement steel shot mixture are heavier than those of the pure dry cement; with heavy density, the effect of improving the stability of ships is more obvious with low center of gravity of ships; with high strength, the structure of ship hull can be well protected and meanwhile the partial strength of ship hull can be increased. 2. cement, water andsteel shot belong to fluid when they are just mixed, so that the mixture can be used for irrigating and filling devices and applied to narrow empty cabin which is hard for the construction staff to enter into. 3. lower cost of design and construction are convenient to product and fill the empty cabin of ships, which improves efficiency and saves the period of ship manufacturing. 4. long-term maintenance is no need for the fixed ballast. 5. the fixing method of the fixed ballast is fastening and reliable.

Description

Technical field [0001] The invention relates to the field of ships, in particular to a fixed ballast of cement steel sand mixture. Background technique [0002] The stability of ships is extremely important to the safe operation of ships; some ships, due to various reasons, under certain loading conditions, may have insufficient stability, and therefore face huge safety hazards. [0003] The primary method to improve the stability of ships and eliminate potential safety hazards is to lower the ship’s center of gravity. The lower the center of gravity of the ship, the more obvious the improvement of ship stability. [0004] Usually, some ships use cement in the bottom empty tanks to lower the center of gravity of the ship. The disadvantage is that the density of cement is small, and a large number of empty tanks (or large-capacity empty tanks) are needed to inject a large amount of cement, but the ship is designed to be hollow. With limited tanks, it is difficult to satisfy the need...

AI Technical Summary

Problems solved by technology

[0004] Usually, some ships use cement to lower the center of gravity of the ship in the hollow tank at the bottom. The disadvantage is that the density of the cement is low, and a large number of empty tanks (or empty tanks with a large capacity) are needed to fill a large amount of cement, and the ship is designed to be hollow. The cabin is limited, and it is difficult to meet the need for a large number of empty cabins to pour cement; the construction of cement injection is difficult, and the construction period is long, requiring a lot of manpower or material resources to lower the center of gravity of the ship

[0005] In addition, some ships place specific cast iron blocks in the bottom empty tank to lower the center of gravity of the ship. The disadvantage is that the cast iron blocks need to be entrusted to cast iron manufacturers. The cast iron manufacturers have long casting and procurement cycles and high costs; , the ballast cast iron block is easily moved by the inertial force during the ship's navigation, hitting the ship's body structure, and easily damaging the ship's body structure

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