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Adjustment method of ballast water in ship ballast tank, ship ballast tank and ship

An adjustment method and a ballast tank technology, applied in the field of ships, can solve the problems of too small bow draft, large bending moment, and increase the amount of steel used in the hull structure, so as to eliminate the free liquid surface, reduce the amount of steel used, and improve stability Effect

Inactive Publication Date: 2019-09-20
GUANGZHOU SHIPYARD INTERNATIONAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the ship is fully loaded, in order to adjust the floating state of the ship, the ballast tank is often in a state of dissatisfaction (if the water in the ballast tank is too much / too little, the bow draft will be too small / too large, which is not conducive to the energy saving of the ship)
Due to the requirements of the regulations, when the ship is sailing, if there is a ballast tank that is not full, when considering the strength, it is necessary to consider the stowage conditions when the tank is full / empty, which will lead to the ship's Excessive hogging / sag bending moment will increase the design load of the hull girder, thereby increasing the steel consumption of the hull structure
In addition, if the ballast tanks are partially filled, a free liquid surface will be created in the tanks, which will adversely affect the stability of the ship

Method used

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  • Adjustment method of ballast water in ship ballast tank, ship ballast tank and ship
  • Adjustment method of ballast water in ship ballast tank, ship ballast tank and ship

Examples

Experimental program
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Embodiment approach 1

[0034] This embodiment provides a ballast tank of a ship, such as figure 1 As shown, the ballast tank 101 is arranged at the tail of the ship 100 , and the floating state of the ship 100 can be adjusted by injecting different amounts of ballast water into the ballast tank 101 . An adjustment device is provided in the ballast tank 101, and the adjustment device is slidably arranged in the ballast tank 101 to adjust the sealed volume of the ballast tank 101 to match the amount of ballast water entering the ballast tank 101 and reduce the pressure of the ship 100. The arch / sag bending moment of the beam reduces the amount of steel used in the ship 100, thereby reducing the weight of the ship 100 empty; Liquid surface, improving the stability of the ship 100.

[0035] Specifically, the adjusting device includes an adjusting cover plate 102 slidably disposed in the ballast tank 101 and a driving device configured to drive the adjusting cover plate 102 to slide. The adjusting cove...

Embodiment approach 2

[0042] This embodiment provides a ship 100, including the above-mentioned ballast tank 101 of the ship. The ship 100 can adjust the floating state of the ship 100 through the ballast tank 101, the ship 100 is relatively stable, and the weight of the empty ship is reduced.

Embodiment approach 3

[0044] This embodiment provides a method for adjusting ballast water in a ship's ballast tank, which is used to control the amount of water injected into the ballast tank of the ship in Embodiment 1. An adjustment device is provided in the ballast tank 101, and the adjustment device is controlled by configured to adjust the sealed volume of the ballast tank 101, such as figure 2 As shown, the method for adjusting ballast water in the ship's ballast tank includes steps:

[0045] S1. When the ballast tank 101 needs to be used to adjust the floating state of the ship 100, calculate the amount of water that needs to be injected into the ballast tank 101 according to the floating state.

[0046] S2. Adjust the adjusting device so that the sealed volume of the ballast tank 101 is equal to the volume corresponding to the amount of water that needs to be injected into the ballast tank 101 .

[0047] Specifically, the adjusting cover plate 102 is driven to slide by the driving device...

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Abstract

The invention relates to the technical field of ships, and discloses an adjustment method of ballast water in a ship ballast tank, the ship ballast tank and a ship. The adjustment method comprises the steps that S1, the amount of water injected into the ballast tank according to the floating calculation when the ballast tank is required to regulate a floating state of the ship; S2, the sealing volume of the ballast tank is made to be equal to the volume corresponding to the amount of water injected into the ballast tank by adjusting an adjusting device; and S3, the sealing volume of the ballast tank is filled with the water. According to the adjustment method, the mid-arch / mid-sag bending moment of a ship beam can be lowered, steel consumption volume of the ship is lowered, and then the weight of an empty ship of the ship is lowered; and due to the fact that the sealing volume of the ballast tank is filled with the water, a free fluid surface of the ballast tank can be eliminated, stability of the ship can be improved. The ballast tank of the ship can adjust the sealing volume of the ballast tank through the adjusting device to match the amount of water entering the ballast tank. The floating state of the ship is adjusted by the ballast tank, and the ship is stable and the weight of the empty ship is low.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a method for adjusting ballast water in a ship's ballast tank, a ship's ballast tank and a ship. Background technique [0002] Generally, when a ship is sailing, in order to ensure the floating state of the ship and the safety of navigation, a certain amount of ballast water needs to be injected into the ballast tank of the ship, so that the ship can reach a certain draft and have a reasonable trim. When a ballast tank is installed, a ballast tank is generally installed at the stern of the ship. Since this ballast tank will generate a large longitudinal moment on the ship, its effect on the trim adjustment of the ship is particularly obvious. When a ship is sailing with full cargo, only the ballast tanks are generally used to adjust the trim of the ship. [0003] When the ship is fully loaded, in order to adjust the floating state of the ship, the ballast tank is often in a state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B39/03
CPCB63B39/03
Inventor 薛林周静
Owner GUANGZHOU SHIPYARD INTERNATIONAL LTD