PURPOSE: To prevent the biting of foreign materials and secure the stable transport by constituting a screw pump from a screw conveyor part having a take-in port and a pump part having a discharge port and installing a screw in a screw conveyor part on the downstream side from the take-in port.
CONSTITUTION: The title screw pump 1 is constituted of a screw conveyor 2 having a take-in port 6 at the lower edge, pump 3 in the discharge part connected with the screw conveyor 2. and a hydraulic motor 4 as driving part. The screw conveyor 2 is constituted of a screw 58 which is installed onto a screw shaft 7 which is integrally formed with the shaft 3b of the blade 3a in the pump part 3 and formed in the equal pitch with the equal diameter except the vicinity of the take-in port 6, casing 5 for accommodating the screw 8, and a bearing 9 for bearing-supporting the screw shaft 7 at the lower edge. Further, the pump part 3 has a blade 3a whose diameter is increased towards the discharge side, casing 3c having an annular part expanded on the downstream side, and a discharge port 15.
YAMAMOTO RYOICHI
INABA KOJI
