A segmented installation method for energy-saving ducts of super-large oil tankers

An installation method and super-large technology are applied in the field of installation of energy-saving conduits of super-large oil tankers in stages, which can solve the problems of crane coordination and installation difficulty, and achieve the effects of saving construction costs, improving construction efficiency, and shortening construction periods.

Active Publication Date: 2019-08-09
SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the energy-saving duct is installed on the hull at the dock section, but the energy-saving duct is located inside the propeller, and the crane cannot be used at the dock section, and a trolley must be used to install the propeller, so the installation is difficult

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  • A segmented installation method for energy-saving ducts of super-large oil tankers
  • A segmented installation method for energy-saving ducts of super-large oil tankers
  • A segmented installation method for energy-saving ducts of super-large oil tankers

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Embodiment Construction

[0039] The present invention will be further described below with reference to the accompanying drawings.

[0040] The energy-saving duct involved in the installation method of the super-large oil tanker energy-saving duct in the segment stage of the present invention is an unclosed conical cylindrical structure, the front end outer diameter of the energy saving duct is 7176mm, the rear end inner diameter is 6100mm, and the length is 2968mm; The energy-saving ducts in the segmenting stage include the port and starboard ducts which are basically semi-circular rings, a middle longitudinal bracket splicing the port and starboard ducts into one, and four pairs of longitudinal brackets covering the port and starboard ducts and located in the middle longitudinal bracket Cover plates on both sides; the outer surfaces of the port duct and the starboard duct are marked with the duct centerline and the shafting centerline respectively, and each has two pairs of lifting rings; the inner s...

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Abstract

The invention discloses a mounting method for an energy-saving conduit of an ultra large crude carrier in a block stage. The mounting method for the energy-saving conduit of the ultra large crude carrier in the block stage comprises a conduit advanced total assembly stage, a shafting pre-aligning stage, an energy-saving conduit locating and mounting stage and an energy-saving conduit and propellershaft welding stage; the conduit advanced total assembly stage comprises the following steps of making a special jig frame, scribing a line on the jig frame, mounting a right half side conduit, mounting a central longitudinal bracket, mounting a left half side conduit, arranging temporary reinforcements at the front end and an opening of the energy-saving conduit; carrying out positioned weldingto weld butt joints of inner shell plates, the central longitudinal bracket and a cover plate, arranging a temporary reinforcement at the rear end of the energy-saving conduit, and cutting off allowance of a fin; and in the shafting pre-aligning stage, a center line of shafting is transferred to a propeller shaft external plate. According to the mounting method for the energy-saving conduit of theultra large crude carrier in the block stage, the energy-saving conduit mounting step is advanced to create a condition for staged boring of a propeller shaft hole; and therefore, the shipbuilding efficiency is effectively enhanced, and the shipbuilding cost is saved.

Description

technical field [0001] The invention relates to a method for installing an energy-saving conduit of a super-large oil tanker in a segmented stage. Background technique [0002] Transportation ships, such as bulk carriers, oil tankers, container ships, etc., are the main force of freight ships. Reducing the energy consumption of transportation ships is of great significance to shipping companies and even the entire shipping industry. At present, the development of the ship type of transport ships has been quite mature, and it has become more and more difficult to reduce the resistance and achieve the purpose of energy saving through the design of the hull line type. The energy-saving duct is a hydrodynamic energy-saving device installed at the front of the propeller of a large transport ship. It improves the local water flow velocity by converging the four scattered water currents to achieve energy-saving effect, and its fuel-saving rate reaches 8%. With the soaring internat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B9/00
CPCB63B71/00
Inventor 徐占勇邵丹
Owner SHANGHAI WAIGAOQIAO SHIP BUILDING CO LTD
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