众所周知,离心泵只有在其腔室和吸水管内灌满水才能起动。松木坪电厂BA、Sh型离心泵原来采用装底阀灌泵。运行实践表明,这种灌泵起动方式存在下列问题: 1.底阀容易卡涩,影响水泵正常工作。由于水泵底阀淹没在水中,工作时因不断的往复或旋转运动而经常发生阀瓣卡煞和磨损;加之本厂冷却水源取自山间溪流,水中挟带泥砂、杂物很多,故底阀卡煞、堵塞、损坏现象 It is well-known that centrifugal pumps can be started only when their chambers and suction pipes are filled with water. Song Muping power plant BA, Sh-type centrifugal pump used to be bottled valve filling pump. Operation practice shows that this type of filling pump start-up has the following problems: 1. The bottom valve is easy to jam, affecting the normal operation of the pump. As the end of the pump submerged in the water, work due to constant reciprocating or rotational movement often occur clavate card Sha and wear; combined with the factory cooling water from the mountain stream, water entrainment of silt, debris, so the end of the valve Kasha, blocked, damaged phenomenon