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混凝土輸送泵采用電動機或柴油機驅動泵送系統，通過液壓系統恒功率控制自動調節混凝土輸送泵的輸送量，也可用手動控制來選擇混凝土輸送量。混凝土泵泵送系統主要由料斗、攪拌機構、混凝土分配閥、混凝土輸送缸、洗滌室以及主油缸等構成。

工作原理：

如(ru)圖所(suo)示，當液壓(ya)(ya)系(xi)(xi)統壓(ya)(ya)力油(you)(you)(you)(you)進入一(yi)主油(you)(you)(you)(you)缸(gang)時(shi)(shi)，活(huo)(huo)塞(sai)(sai)(sai)桿(gan)(gan)伸出(chu)(chu)，同時(shi)(shi)通(tong)(tong)過密封(feng)回路連(lian)通(tong)(tong)管的(de)壓(ya)(ya)力油(you)(you)(you)(you)使(shi)另一(yi)活(huo)(huo)塞(sai)(sai)(sai)桿(gan)(gan)回縮。與主油(you)(you)(you)(you)缸(gang)活(huo)(huo)塞(sai)(sai)(sai)桿(gan)(gan)相連(lian)的(de)混凝(ning)(ning)土(tu)輸(shu)(shu)(shu)送(song)(song)活(huo)(huo)塞(sai)(sai)(sai)回縮時(shi)(shi)在(zai)輸(shu)(shu)(shu)送(song)(song)缸(gang)內產(chan)生自吸(xi)作(zuo)用(yong)，料斗中(zhong)的(de)混凝(ning)(ning)土(tu)在(zai)大氣壓(ya)(ya)力作(zuo)用(yong)和(he)攪拌葉片的(de)助推(tui)作(zuo)用(yong)下(xia)通(tong)(tong)過滑(hua)閥吸(xi)入口被吸(xi)入輸(shu)(shu)(shu)送(song)(song)缸(gang)。同時(shi)(shi)，另一(yi)主油(you)(you)(you)(you)缸(gang)在(zai)油(you)(you)(you)(you)壓(ya)(ya)的(de)作(zuo)用(yong)下(xia)，推(tui)動(dong)主油(you)(you)(you)(you)缸(gang)的(de)活(huo)(huo)塞(sai)(sai)(sai)桿(gan)(gan)伸出(chu)(chu)并(bing)同時(shi)(shi)推(tui)動(dong)混凝(ning)(ning)土(tu)活(huo)(huo)塞(sai)(sai)(sai)壓(ya)(ya)出(chu)(chu)輸(shu)(shu)(shu)送(song)(song)缸(gang)中(zhong)的(de)混凝(ning)(ning)土(tu)，通(tong)(tong)過滑(hua)閥輸(shu)(shu)(shu)送(song)(song)口Y字管進入混凝(ning)(ning)土(tu)輸(shu)(shu)(shu)送(song)(song)管。動(dong)作(zuo)完成后，系(xi)(xi)統自動(dong)換向(xiang)使(shi)壓(ya)(ya)力油(you)(you)(you)(you)進入另一(yi)主油(you)(you)(you)(you)缸(gang)，完成另一(yi)次不(bu)同輸(shu)(shu)(shu)送(song)(song)缸(gang)的(de)吸(xi)、送(song)(song)行(xing)程(cheng)。如(ru)此反復，料斗里的(de)混凝(ning)(ning)土(tu)就(jiu)源(yuan)源(yuan)不(bu)斷地被吸(xi)入和(he)壓(ya)(ya)送(song)(song)出(chu)(chu)輸(shu)(shu)(shu)送(song)(song)缸(gang)，通(tong)(tong)過Y型管和(he)出(chu)(chu)口連(lian)接的(de)管道到達作(zuo)業點，完成泵(beng)送(song)(song)作(zuo)業。