SEDIMENT PRESSURE PUMP FOR CONSTRUCTION WORK, SHIELD MACHINE, AND SHIELD METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sediment pressure pump for construction work whose discharge pressure can be adjusted according to the inflow pressure and pumping distance of sediment to a pump chamber.SOLUTION: There is provided a rotary pump 10 which is used for construction work and pumps sediment, the rotary pump including: a casing 20 having a circular pump chamber 21, a suction part 22A, and a discharge part 23A; a rotor 30 whose axis of rotation is provided in the pump chamber 21 eccentrically with its center axis toward the discharge part 23A; and a plurality of blades 40 which are fitted to the rotor 30 to swing, extend from the rotor 30 to an outer-diameter side of the pump chamber 21, and are so configured that tips abut on a peripheral wall of the pump chamber 21 as the blades swing to the opposite side in the rotating direction of the rotor 30. The relative position of the discharge part 23A to the suction part 22A in the rotating direction of the rotor 30 can be adjusted.