Riser vortex induced vibration suppression device of crisscross spiral pipe drainage

The utility model relates to a riser vortex induced vibration suppression device of crisscross spiral pipe drainage is by adhere to the sleeve pipe and crisscross spiral pipe is constituteed. Adhere to the sleeve pipe and constitute by two semicircular cylinders, follow the both sides suit outside the riser. Crisscross spiral pipe is become with two right -handed helix nests of tubes by two left hand helix pipes, whenever partly adheres to the sleeve pipe lateral wall and is equipped with a left hand helix pipe and a right -handed helix pipe from top to bottom. Riser rear flow field is disturb through spiral pipe make progress drainage or drainage downwards to rivers, restraines the formation and development of swirl to realize vortex induced vibration's suppression. The utility model discloses can slow down the vortex induced vibration that different incoming flow directions cause, and low cost, simple to operate, repeatedly usable.