on January 5, 2025, invested by China Communications Second Aviation Bureau and built by Shanghai Zhenhua Heavy Industry, the "Second Aviation Changqing" piling equipment was successfully delivered in Qidong, Jiangsu Province.. As the piling equipment with the highest pile frame, the largest lifting capacity, the longest pile length and the strongest wind and wave resistance in the world, its delivery marks a new milestone in the field of marine engineering equipment manufacturing in China.

It is reported that the piling equipment has a total length of 130.5 meters, a type width of 40.8 meters, a type depth of 8.4 meters, and a pile frame height of 150 meters. The Main hydraulic cylinder thrust5000 tons, the world's largest hydraulic cylinder. The hydraulic cylinder is matched by Hengli, weighing 385 tons, with a cylinder diameter of 1.6 meters, a stroke of 21 meters and a total length of 28 meters..                    

        The manufacturing road of this world record-breaking "big cylinder" is not ordinary. Hengli team bravely took up the challenge and faced the difficulties. Through comprehensive analysis, rigorous design and investment in the blessing of the newly-built super-large hydraulic cylinder supporting production line, A number of key technological breakthroughs have been achieved in the structural design of large and heavy hydraulic cylinders and special processing techniques.. In particular, it successfully overcomes the problem of high-speed cladding application on large rods and greatly improves the reliability and service life of the product.

        In the construction of the project piling equipment, Hengli hydraulic system engineers also went to the site, participate in forward tilt, backward tilt and load test of pile frame. In the difficult test process, they braved the bitter river wind and paid close attention to various data comprehensively and carefully to realize the micro-speed control required for oil cylinder hinge changing, centering and pin changing, with the accuracy reaching millimeter level. The "luffing and reaming" of the pile frame of the auxiliary pile driving equipment is completed efficiently, accurately and safely.