Self-maintaining and anti-scouring device for offshore wind power pile foundation

A self-maintaining and anti-scouring device for an offshore wind power pile foundation, comprising:

• a plurality of fixing parts (10) configured to be fixedly disposed on seabed;
• an installation part (20) disposed above the plurality of fixing parts (10) and configured for installing wind power equipment;
• and
• a sand-screening part (30), comprising a sand-screening ring (31) and an impeller (32) both of which are disposed below the installation part (20), wherein a seawater inlet (311), a stirring chamber (312) and a sand outlet (313) are disposed on the sand-screening ring (31) in sequence from a top to a bottom of the sand-screening ring (31), and a seawater outlet (314) is disposed on a side surface of the sand-screening ring (31) to communicate to the stirring chamber (312), wherein the impeller (32) is horizontally and rotatably disposed in the stirring chamber (312) to separate sand and seawater in the stirring chamber (312) through a centrifugal force, wherein the sand and the seawater are discharged through the sand outlet (313) and the seawater outlet (314) respectively, at which time sand-containing seawater enters the stirring chamber (312) through the seawater inlet (311).