The present invention relates to an automatic contamination draining device mounted at the bottom of aquaculture equipment, which may automatically remove the contamination at the equipment bottom employing the water flow and water pressure during drainage with no need of electric power. The automatic contamination draining device comprises: a pipe joint rotatably pivoted with the water outlet at the bottom of equipment a contamination draining pipe fitted with the pipe joint in radial extension a shaft and spiral blades disposed at the center of the contamination draining pipe and a transmission member and rollers assembled on the outer side of the shaft. During drainage, the water flow entering the contamination draining pipe may drive the spiral blades and the shaft for rotation. The whole set of contamination draining device may be further driven by the rotation of rollers through the transmission member to rotate and traverse at the bottom of equipment with the water outlet as center. During traversing, the contamination draining pipe may suck in the contamination for dynamically and substantially removing the contamination at the bottom of equipment.本發明為一種安裝在水產養殖設備底部的自動排污裝置,可集中利用排水時的水流及水壓,無需電力驅動即可自動清除設備底部之污物。所述自動排污裝置包括:一可轉動地軸接於設備底部排水口之管接件、一套接於管接件而徑向延伸的排污管、一設置在排污管中心之轉軸及螺旋葉片,以及一組接於轉軸外側端之傳動組件及滾輪;排水時,集中進入排污管的水流可帶動螺旋葉片以及轉軸旋轉,並且經過傳動組件驅動滾輪旋轉滾動,進而帶動整組排污裝置以排水口為中心在設備底部轉動行進,行進時藉由排污管吸入污物,即可以對設備底部污物進行動態性地全面清理。500‧‧‧排水口10‧‧‧管接件11‧‧‧軸接管12‧‧‧套接管20‧‧‧排污管21‧‧‧通孔22‧‧‧刮片23‧‧‧鏤空部24‧‧‧帽蓋30‧‧‧轉軸40‧‧‧螺旋葉片50‧‧‧傳動組件60‧‧‧滾輪
