抽沙船离心泵用来泵送液体中含大尺寸至小尺寸物料的泥浆流时，抽沙船降低离心泵叶轮的磨损和进步离心泵效率的方法，其特征是，它包括：

a.将液体切向喷入涡流室形成涡流，并且从该室沿切向排除一部门该液体；
b.将该泥浆轴向喷入该室，该涡流将大尺寸的该物料与其余留下来的该泥浆和液体分开；
c.将该留下来的该泥浆和液体沿轴向从该室排除，并将其喷入一离心泵的入口；
d.利用从抽沙船离心泵出来的物料作为形成该涡流的喷射液体；因此，该大尺寸的物料移向该涡流的外圆而被排出，结果，中、小、尺寸的物料和液体被喷入该离心泵，因此，抽沙船降低了该叶轮的磨损，并答应该泵高速运转，因而效率进步。

Pumping sand centrifugal pump for pumping liquid with big size to small size of the material of the mud flow, pumping sand reduce centrifugal pump impeller wear and improve the efficiency of centrifugal pump, which is characterized. It includes:

a.将液体切向喷入涡流室形成涡流，并且从该室沿切向排除一部门该液体；

A. the liquid is sprayed into the swirl chamber to form a vortex, and the liquid is cut from the chamber to exclude a part of the liquid;

b.将该泥浆轴向喷入该室，该涡流将大尺寸的该物料与其余留下来的该泥浆和液体分开；

B. the slurry is injected into the chamber, which separates the material from the rest of the mud and liquid;

c.将该留下来的该泥浆和液体沿轴向从该室排除，并将其喷入一离心泵的入口；

C. will be left to the mud and liquid along the axis from the chamber excluded, and will be sprayed into the inlet of a centrifugal pump;

d.利用从抽沙船离心泵出来的物料作为形成该涡流的喷射液体；因此，该大尺寸的物料移向该涡流的外圆而被排出，结果，中、小、尺寸的物料和液体被喷入该离心泵，因此，抽沙船降低了该叶轮的磨损，并答应该泵高速运转，因而效率进步。

D. using from pumping sand pump out of the material as the formation of the vortex of the injection liquid; therefore, the large size of the material shift to the vortex of the outer circle and is discharged. As a result, medium and small size of the material and the liquid is sprayed into the centrifugal pump. Therefore, pumping sand reduces the wear of the blade wheel, and a high-speed operation of the pump should be, and thus improve the efficiency.