On June 6, China's largest double-arm variable amplitude crane ship "Second Navigation Excellence" was launched in Qidong, Jiangsu Province, marking that the ship has successfully completed the main structure and entered the sprint stage of hoisting equipment installation and commissioning and delivery.

    Liu Xiucheng, chief engineer of the Equipment Department of the Technology center of the second Aviation Bureau of China Communications, deputy general manager and chief engineer of the "two ships" construction project, introduced the hull length of 165 meters, the width of 52 meters, the depth of 11 meters, the design draft of 6.5 meters, and the maximum lifting weight of 5500 tons. "The maximum lifting weight is equivalent to lifting 4,000 cars to the height of a 40-story building."

    In addition, the ship can also cover the 130 meter span of non-navigable hole steel box girder overall lifting, the maximum lifting height of 120 meters, with 47 meters of height limit navigation, the use of floating tank technology, the minimum draft is only 4.5 meters, equipped with anti-rolling water tank, further improve the seakeeping performance, can adapt to the Yangtze River estuary, Pearl River estuary, Zhoushan Islands and other typical coastal wave conditions. It has broad market application prospects and can be called "bridge building artifact".

    It is reported that in order to fit the national strategic development direction of "high-end, green and intelligent" equipment, the ship for the first time applied efficient permanent magnet motors on engineering ships, and equipped with photovoltaic and energy storage systems, supplemented by intelligent energy management systems, that is, power, distribution (storage), and multi-dimensional green energy-saving technology to improve fuel economy, is expected to reduce carbon emissions by about 15%.

    In terms of intelligence and information technology, the research and development of wind, wave and current measurement of the working environment perception system can realize intelligent decision-making; Develop an operation management system that integrates the judgment of hoisting process, post-operation evaluation and intelligent maintenance of ship, and automatically generates operation records such as construction logs.

    After the delivery of the ship, the first battlefield is the high-speed railway connecting Suzhou and Ningbo - Hangzhou Bay cross-sea railway bridge, and the subsequent will participate in the construction of the sea suspension bridge of the third East passage in Xiamen City.

    It is understood that at the same time, the second aviation Bureau of the CCCC started the world's largest pile piling ship and the largest lifting moment tower crane flagship equipment construction work, and the launch of the crane ship together and called "two ships and a tower", the future will serve more super projects, play the role of a large country.