３ＰＮ型泵增设灌水弯管甘肃省１４９煤田地质勘探队徐中吉我队在白银市施工住宅钻孔灌注桩工程时，使用新购置的３ＰＮ型卧式单级单吸悬臂式泥浆泵。由于吸水管“莲蓬头”活阀不灵活等原因，每次起动前，必须卸掉排水管法兰螺丝并移开排水管，向泵内和吸水管内灌满泥浆，... 3PN-type pump additional irrigation pipe Gansu Province 149 Coalfield Geological Exploration Team Xuzhong Ji I team in the construction of residential billet in Silver City, the use of newly purchased 3PN horizontal single-stage single-suction cantilevered mud pump. As the suction pipe “shower head” valve is not flexible and other reasons, before each start, you must remove the drain pipe flange bolts and remove the drain pipe to the pump and suction pipe filled with mud, ...