The First Chinese Machine Ball Valve Was Shipped Smoothly

The first Chinese ball valve of the highest head pumped storage power station was shipped smoothly.

Recently, the first chinese ball valve of Changlong Mountain pumped storage power station was successfully shipped from Dongfang Electric Co., Ltd. of Dongfang Electric Group. This is also the ball valve of the highest head pumped storage unit in China.

Changlong Mountian pumped storage power station is located in Tianhuangping Town and Shanchuan Town of Anji County, Zhejiang Province, China. It is a super high head and high-speed pumped storage power station with large capacity. Dongdian provides it with 4 sets of 350MW pumped storage units and the auxiliary equipment, and it is also the benchmark unit for Dongdian to build pumped storage version 2.0. The design and development difficulty of the unit is belong to the highest difficulty' degree in the world, which challenges the research and development limit of pumped storage technology. The ball valve is one of the important parts of the pumped storage unit. The design head length of the unit is 1200 meters, and the pressure test head length of the ball valve is 1800 meters. High water head requires high sealing performance, high manufacturing process and strict assembly deviation of ball valves.
 

 

Based on the experience in the design of general ball valves, Dongdian has made great efforts to tackle the key technologies of the ball valve for 1800 meter class ultra high head and large diameter pumped storage units. In view of the difficulties and key points such as the processing of key parts of the ball valve and the assembly of the ball valve, the project development team formulated the operation instruction and process quality control card. The team strictly controlled the key process quality of the ball valve, formed the standardized manufacturing process for the processing and assembly of the ball valve of the pumped storage unit, and creatively designed the medium, high and ultra high head ball valves, which is applicable to all the pumped storage units at present. The research results have completely independent intellectual property rights. It is also suitable for the ball valve design of ultra high head impact unit and high head mixed flow unit, and it can also be extended to appy to the pipeline valves of other industries such as marine, diving equipment, high-pressure water transmission, etc.

After many processes such as valve welding, processing of valve bodies and valves, valve assembly, by-pass pipeline piping and hydraulic test witness, the first machine ball valve was painted and packaged in the shipping department of Dongfang Electric Products, and successfully shipped on March 10. It marks that the hydraulic research and development of Dongdian pump turbine in ultra high head reaches the world's leading level.