Convection current structure of twining

The utility model discloses a convection current structure of twining, form by top -down's upper head plate, intermediate lamella, bottom board the flow table, set up on the upper head plate by interior to the inboard recess of outer upper head plate, upper head plate middle part recess and the upper head plate outside the recess, set up on the board of bottom by interior to outer bottom inboard side recess, bottom board middle part recess and the bottom board outside the recess, the inboard recess of upper head plate is the same with bottom inboard side groove position and shape, upper head plate middle part recess is the same with bottom board middle part groove position and shape, upper head plate outside recess and bottom board outside groove position and depth face with, the radial length of upper head plate outside recess is greater than the radial length of bottom board outside recess. The utility model discloses an advantage: use under the prerequisite of intensity the flow table satisfying coil of st