An internal support device for installing a draft tube of a bulb turbine unit

Abstract

The utility model discloses a kind of bulb tubular turbine unit tail water pipe installation internal supporting device, it is related to bulb tubular turbine unit tail water pipe support field, including tail water pipe diffusion section and several split plates inserted in tail water pipe diffusion section, it is characterized by: several split plates are fixed with tail water pipe diffusion section axis as center equiangular distribution and each other, the split plate is contacted with tail water pipe diffusion section inner wall.Affinity effect is in that: the device uses split plate and supporting assembly integration prefabricated structure, the fan-shaped plate of supporting assembly is accurately adapted design according to tail water pipe diffusion section inner wall radian, radius is adjusted corresponding with diffusion section diameter change, realize and the overall surface contact support of inner wall, can completely avoid supporting gap generation and split plate displacement in pouring process, eliminate tail water pipe diffusion section port opening, inner wall depression and other deformation, guarantee water flow passage geometric precision, and then improve unit installation precision and operating stability, improve power generation efficiency.