The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station

Huadian Technology ›› 2009, Vol. 31 ›› Issue (5): 54-56.

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The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station

XIAO Han，ZHOU Yaolong

China Water Conservancy and Hydropower Engineering Bureau NO. 8, Changsha 410007, China

Received:1900-01-01 Revised:1900-01-01 Published:2009-05-25

Abstract

Abstract:

In commission of Unit No.22 of Three Gorges Right Bank Hydropower Station, the volute shaped disk drain valve joystick has broken. The joystick has to be repaired for it is impossible to be replaced. According to careful study and comparison, the tungsten argon arc welding technology and mechanical workout were adopted finally for the repair. The concrete processing scheme and the result were analyzed and summarized, and relevant proposal for the handling of future same problem was given. After the repair, the joystick can meet the technical requirements of highprecision for slender piece.

Key words: spiral case, disk type valve, fracture, tungsten argon arc welding, repair

XIAO Han;ZHOU Yaolong. The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station[J]. Huadian Technology, 2009, 31(5): 54-56.

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The spiral case disk shaped drain valve joystick fracture repair of Three Gorges Hydropower Station

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