A water powered reciprocal impingement sprinkler is adapted to be reciprocally moved on a cable, wherein a first stopper and a second stopper are respectively secured on two opposite ends of the cable. The water powered reciprocal impingement sprinkler includes a main body is adapted to be reciprocally moved on the cable between the first stopper and the second stopper. A chamber is defined in the main body between an inlet defined in the main body and a spray head disposed on the main body. An impeller is rotatably mounted in the chamber. A roller and a vice roller are mounted in the main body for reciprocally driving the main body. An automatic switcher is provided the main body to alternately change the moving direction during sprinkling when contact with a corresponding one of the first stopper and the second stopper.本發明係提供一種水力推動式往復位移灑水裝置,係設於一導動索,且該導動索延伸路徑間隔分設有第一、第二擋止件;該水力推動式往復位移灑水裝置主要特點包括組設於導動索且位於第一、第二擋止件之間呈可位移之裝置主體、設於裝置主體的進水口與灑水頭之間的一作動腔室、旋設於作動腔室中的一水力推動葉輪、使裝置主體得沿著導動索位移的主滾輪及副滾輪、用以令裝置主體得於第一、第二擋止件之間自動進行往返切換的一自動換向機構;藉此構成之水力推動式往復位移灑水裝置,僅須利用灑水用之水力即可直接推動位移並自動轉向作往返切換。A‧‧‧水力推動式往復位移灑水裝置10‧‧‧導動索12‧‧‧第二擋止件20‧‧‧裝置主體202‧‧‧第二端部22‧‧‧灑水頭25‧‧‧進水端252‧‧‧逆向導流道30‧‧‧水力推動葉輪40‧‧‧主滾輪50‧‧‧副滾輪60‧‧‧自動換向機構611‧‧‧第一受推端62‧‧‧水流控向區段11‧‧‧第一擋止件201‧‧‧第一端部21‧‧‧進水口24‧‧‧作動腔室251‧‧‧順向導流道26‧‧‧出水端52‧‧‧第二副滾輪61‧‧‧受推作動架612‧‧‧第二受推端63‧‧‧穿流孔
