Bulbous bow refit technology

A bulbous bow and craft technology, applied in the directions of transportation and packaging, ship parts, ships, etc., can solve the problems of inaccurate closing of the new bulbous bow and the original ship, the bulky size of the bulbous bow, and the damage to the original ship, etc. Construction time, easy and fast operation, accurate closing effect

Active Publication Date: 2018-11-09
广州文冲船舶修造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size of the ship and the bulbous bow is huge, and the original ship may be damaged during the cutting and installation process, and the new bulbous bow and the original ship may not be closed accurately, etc., requiring a lot of repair and adjustm

Method used

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  • Bulbous bow refit technology
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  • Bulbous bow refit technology

Examples

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Embodiment Construction

[0020] In the present invention, before the ship enters the factory, the new bulbous bow general section is prefabricated in the workshop according to the drawings. After the ship enters the factory, cut off the relevant position of the old bulbous bow in the dock according to the requirements of the drawing, and remove the cut part. Finally, use the floating crane to hoist the new bulbous bow section into the dock, pull it into place through the large-scale segmental shift tooling pre-installed on the bottom of the dock, and use a group of segmental positioning trolleys to move it in a small range , to accurately locate the general section of the new bulbous bow. Replacing the old bulbous bow with a re-optimized and designed structure can reduce the navigation resistance of the ship at low speed, reduce the fuel consumption of the ship, and reduce the shipping cost. At the same time, the refitting process of the present invention can greatly reduce the bulbous bow replacement...

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Abstract

The invention provides a bulbous bow refit technology. The bulbous bow refit technology comprises the three main processes of manufacturing of a new bulbous bow, removing of an old bulbous bow, and hoisting of the new bulbous bow. During hoisting of the new bulbous bow, an original ship center line, a rib position line and a horizontal detecting line are drawn on an original ship outer plate, projection lines of the original ship center line and the rib position line are drawn on the dock floor, and by combining a floating crane, a large segmented positioning tool and a segmented positioning trolley and taking the center line, the rib position line, the horizontal detecting line and the projection lines of the center line and the rib position line as the standard, precise positioning of the new bulbous bow in transverse, longitudinal and height directions is achieved. The bulbous bow refit technology can fully utilize existing equipment to shorten the docking period, and operation is accurate and quick.

Description

technical field [0001] The invention belongs to the technical field of ship building, and in particular relates to a bulbous bow refitting process. Background technique [0002] The bulbous bow is the spherical protruding part below the water surface of the bow of the ship. When the size and shape of the bulbous bow match the hull and speed of the ship, it can turn the wavy water waves generated by the ship's side by 180 degrees, offset the resistance of the waves to the ship, and reduce the ship's navigation. Otherwise, it will bring greater resistance to the navigation of the ship. [0003] In the "golden age" of the shipping market, a large number of ships were designed and built to meet the requirements of high-speed operation, and their speed can generally reach about 25 knots. However, under the influence of the general slowdown of global economic growth in recent years, the shipping market was once in a downturn. In order to maximize profits, shipping companies gene...

Claims

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Application Information

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IPC IPC(8): B63B1/06B63B1/40B63B9/06
CPCB63B1/063B63B1/40B63B73/00Y02T70/10
Inventor 冯木水张智明曹少力冯桂燕
Owner 广州文冲船舶修造有限公司
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