一、前言 七十年代,由荷兰IHC公司建造的4600型绞吸式挖泥船,其设备装置是双泵串联,宜于远排距施工。由于设备条件所限制,一些疏浚部门,在遇到排泥距离还不到1000米的吹填工程时,也用这类船舶串泵施工。串泵的扬程高,管线短时阻力损失小,泥泵容易发生流量过大,致使挖泥船不能正常工作。为了防止挖泥船的工况出现恶化,只好在调 I. Introduction In the seventies, the Type 4600 cutter suction dredger constructed by IHC of the Netherlands, whose equipment and equipment are dual-pump in series, is suitable for long distance construction. Due to the limited equipment conditions, some dredging departments also use such ships to pump in the event of a dredging project within a distance of less than 1,000 meters. The pump head lift high, short-term pipeline loss of resistance loss, mud pump prone to excessive flow, resulting in dredging can not work properly. In order to prevent the condition of the dredger from deteriorating, it had to be adjusted