【Major Equipment in the Chemical Engineering Sector】199 – Main inlet ball valve for energy storage power stations, with a total weight of approximately 166.5 tons
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Red May for chemical industry workers! Reply reward! ---------------------------------------------- The past decade has been a period of rapid development for China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and increased use of domestic equipment. We invite everyone to share their insights and discuss these topics together; let’s cheer for Made in China and support the development of chemical processing equipment! ===================== The total weight is about 166.5 tons! On April 12, the main inlet ball valve for Unit 2 of the Wendeng Pumped Storage Power Station, manufactured by Harbin Electric Machinery Factory, was successfully hoisted. This was part of the mechanical and electrical installation works for Unit 2 of this power station, which are being carried out by China AnNeng Second Engineering Bureau; such completion laid a solid foundation for the station to achieve its power generation targets on schedule. It is stated that the main inlet ball valve is a core component of the units in pumped storage power stations. It is a valve located between the turbine volute and the pressure pipeline, and its primary functions are to reduce water leakage from the unit when it is shut down, to cut off the flow of water during maintenance to ensure safety, and to prevent the escalation of accidents in the event of a malfunction in the unit. The main inlet ball valve for Unit 2 of the Wendeng Pumped Storage Power Station was manufactured by Harbin Electric Machinery Co., Ltd. The ball valve features a horizontal-axis, double-seal design; its valve disc is cast as a single piece, while the valve body is constructed through segmented casting and welding. The designed head capacity of this ball valve is 816 meters, with a maximum static head of 590 meters. The valve itself is 3.26 meters long, 6.626 meters wide, and 4.24 meters high; the inner diameter of its inlet and outlet flanges is 2.3 meters, and its total weight is approximately 166.5 tons.
The Harbin Electric version of the \"Bing Dwen Dwen\" Fengning ball valve has a design head pressure of 762 meters, with a ball valve diameter of 2.35 meters; it belongs to the category of high-head, large-diameter ball valves. Ball valves operating under high head conditions experience significant deformation of their valves; the uneven deformation of these valves poses a challenge to the sealing performance, which is a difficulty in the sealing design of ball valves. The Harbin Electric technical team innovatively used finite element analysis to conduct a comprehensive assessment of the deformation amounts of the sealing rings and valve seat seals. By combining actual operation data from previous projects, they determined precise values for the compensation required for the sealing rings, thereby ensuring the safety and reliability of the ball valve’s sealing mechanism. Furthermore, Harbin Electric has also strived for excellence in the detailed design of ball valves. The sealing ring adopts a T-shaped structure to enhance its structural stiffness, while the sealing ring and the sealing seat utilize a cone-sphere contact surface to improve the tightness of the seal. A sand-blocking ring is added next to the sealing ring to extend its service life… The goal is to create a high-quality ball valve with reliable sealing and overall safety. All functions of the currently in-use Fengning ball valve fully meet the safety operation requirements of the power plant.