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Design method of water holes in ship ballast tank, and ship

A design method and water hole technology, applied in ship construction, ship components, ship safety, etc., can solve problems such as increasing drainage time, idling, and influence of double bottom structure strength, and achieve the effect of avoiding idling

Active Publication Date: 2019-06-21
GUANGZHOU SHIPYARD INTERNATIONAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current ship products in operation, when the water level in the ship’s ballast water tank is low, it can only flow into the suction port through the water hole at the bottom, and the size of the water hole is too large or the volume is too large, which will affect the structure of the double bottom. Intensity makes an impact
However, if the area of ​​the flow hole is too small, it will inevitably lead to the weakening of the ballast discharge capacity and increase the drainage time. At the same time, it is easy to cause the ballast pump to fail to work normally due to the actual flow rate being too low, that is, to appear idling.

Method used

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  • Design method of water holes in ship ballast tank, and ship
  • Design method of water holes in ship ballast tank, and ship
  • Design method of water holes in ship ballast tank, and ship

Examples

Experimental program
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Effect test

Embodiment approach 1

[0035] This embodiment provides a design method for the flow hole in the ship's ballast tank, such as figure 1 shown, including the following steps:

[0036] S11. Determine the arrangement position of the suction port 100 in the ballast tank and the diameter of the suction port 100, and calculate the cross-sectional area S of the pumped water flow in the ballast tank according to the diameter of the suction port 100.

[0037] S12. Determine the size of the flow holes to be arranged.

[0038] S13. Divide the enclosures in the ballast tank around the suction port 100 into multiple levels of enclosures.

[0039] In step S13, the enclosure where the suction port 100 is located is divided into the first-level enclosure 1, and the multiple enclosures surrounding the first-level enclosure 1 are divided into multi-level enclosures according to the distance from the first-level enclosure 1 grid.

[0040] S14. According to the diameter of the suction port 100 and the size of the wate...

Embodiment approach 2

[0043] This embodiment provides a design method for the flow hole in the ship's ballast tank, which is an improvement made on the basis of Embodiment 1, such as figure 2 shown, including the following steps:

[0044] S21. Determine the arrangement position of the suction port 100 in the ballast tank and the diameter of the suction port 100, and calculate the cross-sectional area S of the pumped water flow in the ballast tank according to the diameter of the suction port 100.

[0045] S22. Determine the shape and size of the flow holes to be arranged.

[0046] In step S22, while determining the size of the water hole, the shape of the water hole is determined. Determining the shape of the flow holes facilitates a more reasonable arrangement of the subsequent flow holes.

[0047] S23. Divide the enclosure where the suction port 100 is located into a first-level enclosure 1, and divide the enclosure adjacent to the first-level enclosure 1 into a second-level enclosure 2, which...

Embodiment approach 3

[0056] The present invention also provides a ship, which adopts the design method for the water flow hole in the ballast tank of the ship in the first embodiment or the second embodiment to design the water hole in the ballast tank of the ship. The ship can reasonably arrange the flow holes in the ballast tank, empty the ballast water within a specified time, and avoid idling of the ballast pump, prolonging the service life of the ship.

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Abstract

The invention relates to the technical field of shipbuilding, and discloses a design method of water holes in a ship ballast tank, and a ship. The design method comprises the steps: S1, determining anarrangement position of a suction port in the ballast tank and the diameter of the suction port, and calculating, according to the diameter of the suction port, a cross-sectional area S of a water flow extracted from the ballast tank; S2, determining the size of the water holes to be arranged; S3, dividing a surrounding grid inside the ballast tank around the suction port into a plurality of levels of surrounding grids; and S4, calculating, according to the diameter of the suction port and the size of the water holes, the quantity of water holes holes in the different levels of surrounding grids. According to the design method of the water hole in the ship ballast tank disclosed by the invention, the water holes are reasonably arranged, ballast water is discharged in a prescribed time, and idling of a ballast pump is avoided. According to the ship disclosed by the invention, the water holes are reasonably arranged, ballast water is discharged in a prescribed time, idling of the ballast pump is avoided, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a method for designing a flow hole in a ship's ballast tank and a ship. Background technique [0002] During the operation of the ship, the ballast water in the ballast tank is often replaced. When the ship removes the ballast, the ballast water in each area separated by the internal components passes through the openings in the tank (including lightening holes, Manhole, water hole) into the ballast water suction area, and then discharged through the ballast pump to complete the drainage operation. And when the water level in the tank was low, the ballast water could only flow into the suction port through the flow holes at the bottom of the ballast tank. [0003] In the current ship products in operation, when the water level in the ship’s ballast water tank is low, it can only flow into the suction port through the water hole at the bottom, and the size of the water hole ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B43/06B63B9/00
Inventor 李海涛朱旭志魏涛闫利文王莉莉
Owner GUANGZHOU SHIPYARD INTERNATIONAL LTD