en.Wedoany.com Reported - The spiral case of Unit 2 at the State Grid Xinyuan Zhejiang Pan'an Pumped Storage Power Station has been hoisted into place, marking the project's entry into the parallel construction phase for two units.

The spiral case is a core flow passage component of the hydro-turbine generator unit, and its installation quality directly affects the unit's operational stability and power generation efficiency. The hoisted spiral case weighs approximately 116 tons, with a maximum diameter exceeding 10 meters, and is manufactured from high-strength steel. Drawing on the construction experience from Unit 1, the project team strictly controlled key indicators such as welding parameters, roundness, and levelness throughout the process, achieving a 100% first-pass rate for welding and a 15% improvement in construction efficiency compared to the first unit.

To address the high-risk characteristics of heavy lifting, high-altitude operations, and cross-operations, the project team optimized the specialized hoisting plan, comprehensively identified hazard sources, implemented graded prevention and control measures along with three-tier safety management requirements, and conducted specialized briefings and pre-job retraining for key personnel in lifting, rigging, and welding to ensure the safety and precision of the hoisting operation.

The State Grid Xinyuan Zhejiang Pan'an Pumped Storage Power Station is a key regional energy infrastructure project. Once completed, it will serve functions such as peak shaving and valley filling, frequency and phase modulation, and emergency backup, helping to optimize the regional energy structure and promote green and low-carbon development. In the next phase, the project team will coordinate the simultaneous construction of the two units, strengthen quality and safety control throughout the process, and efficiently advance subsequent core equipment installation procedures to ensure the project is completed and put into operation on schedule.

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