The 120,000-ton bulk carrier built by Jiangdong Shipyard has a complicated installation process, high precision and high difficulty. In the past, there were many defects in the process of installing and constructing after segmentation and large-scale closing. First, the construction was difficult, the secondary treatment of the cabin was reworked, and the construction cost was high. Second, the operation environment of the boring cabin was poor, and the installation coefficient of the operation in the cabin with insufficient ventilation was low; Third, the construction period is long and the efficiency is low, which is contrary to the modern shipbuilding management concept.
In order to narrow the gap in shipbuilding, the factory set up a “Jet Plate Support, Pre-installation of Box Foot†research team to study and analyze the feasibility of pre-installation of the support of the dimethyl plate and the box legs in the segment. On the basis of the implementation of the new process of pre-assembly of the box foot segment, combined with the final assembly of the D-segment, the production environment of the cargo compartment and the double-layer bottom section is improved, which lays a foundation for improving the precision of shipbuilding and implementing the PSPC standard. .
In the past two years, the ship market has caused a shortage of critical equipment for ships, and it has become common to delay the delivery of purchased equipment for several months. In order to adapt to the market and solve the pressure brought by the lag of outsourcing equipment, Jiangdong Shipyard has creatively proposed to complete the installation of shafting and rudder water on the mooring state. In 2007, the plant communicated with the shipowner several times. After obtaining the approval of the shipowner and the GL surveyor, they began to implement the plan to expose the stern axis to the surface of the water through the downdraft ballast test of the ankle chamber. The axis of the ship and the center line of the rudder line determined on the shore, that is, the “double centering†implementation of the underwater installation project. Due to the feasibility of the program, combined with prudent operation and proper command, the five 12,000-ton bulk carriers of Jiangdong Shipyard successfully implemented the installation of the shaft and rudder on the water, and passed the GL inspection. The “Double Center†process project was identified by the Science and Technology Department of Anhui Province as the “Domestic First†project in 2007.
The No. 12 12,000-ton bulk carrier was launched, which is the last big node of the Jiangdong Shipyard's 2007 “six-five-crossing†target. Since October 2007, the water level of the Yangtze River has continued to fall. In order to seize the market and ensure that the No. 12 ship is safely and smoothly launched under the condition of ultra-low water level, the plant has formulated the “Safe Water Launch of the Yangtze River with a Water Level of 2.8 Meters in the Yellow Seaâ€. Plan. Based on the detailed records of the water level of the Yangtze River for many years, after repeated demonstrations and feasibility analysis of the scheme, the plant adopts the airbag-assisted launching process: two ligations of 1.6 m in diameter and 14 m in length on the steel brackets on both sides of the bow. The airbag, adding about 100 tons of buoyancy, achieved the ship's water buffering effect, and achieved the goal of a 12-million-ton bulk carrier in the 12-million-ton bulk carrier at a height of 2.8 meters in the Yellow Sea.
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