Recently, under the precise traction of a 450-ton crawler crane from Zoomlion, the base ring of Unit 1 of the Pankou Pumped Storage Power Station in Hubei Province was smoothly lifted from a height of dozens of meters into the pit and positioned. The maximum rotational diameter of the seat ring hoisted this time exceeded 13 meters, making it the largest seat ring for a pumped storage unit in China at present. The successful hoisting marks that the installation of embedded parts for the turbine units of this power station has fully entered its peak period.
The Pan Kou Pumped Storage Power Station is a project under the national medium and long-term development plan for pumped storage and a key implementation project in Hubei Province's 14th Five-Year Plan. It is also currently the ultra-low head pumped storage project under construction in China with the largest head variation and the largest runner diameter. The seat ring, as the core component of the turbine embedded parts, plays a skeletal role in the entire unit. Its installation quality directly affects the operational efficiency and stability of the entire machine. The unit seat rings hoisted this time were transported to the site in two pieces, each weighing approximately 92 tons and 85 tons respectively. The total weight of the single unit was 177 tons, with a maximum outer diameter of 10.1 meters and a height of 3.14 meters.
Facing such a huge object, coupled with the narrow factory building,
limited space and the risks brought by cross-operation hoisting, how to safely hoist the seat ring to the designated machine pit with millimeter-level precision is no small challenge. After careful study and prudent consideration, the project department of the contractor finally selected Zoomlion's 450-ton crawler crane, this "steel giant arm", to undertake the important task.
During the hoisting process, Zoomlion's 450-ton crawler crane adopted two shifts for segmented hoisting, demonstrating extremely strong adaptability to working conditions and hoisting stability. Starting from July 14th, the first unit seat ring hoisting was carried out. By July 16th, the hoisting tasks of two unit seat rings were successfully completed in just three days, demonstrating the style of heavy equipment with safe, efficient and precise construction performance.
The successful hoisting of the first unit seat ring at the Pan Kou Pumped Storage Power Station has laid a solid foundation for the orderly progress of the subsequent volute installation work. Zoomlion cranes will continue to shoulder the responsibility and, as always, provide solid equipment support for the project construction, facilitating the project to proceed as scheduled.
