Novel segmentally-assembled shaft tubular pump device

The invention discloses a novel segmentally-assembled shaft tubular pump device and belongs to the technical field of hydraulic engineering equipment. The shaft tubular pump device is formed by connecting a water guide cone, a shaft, a shaft sleeve, an impeller, a hub, a shaft section housing, a front guide section housing, an impeller section housing and a guide vane section housing, wherein the water guide cone, the shaft, the shaft sleeve, the impeller and the hub are arranged on a transmission shaft; and the shaft section housing, the front guide section housing, the impeller section housing and the guide vane section housing are arranged outside the transmission shaft. By adopting a segmentally-assembled structure, Stuffing box sealing of a traditional shaft tubular pump can be changed into mechanical sealing, and the mechanical sealing structure is arranged in the shaft, so that the size of the shaft is reduced, and the sealing performance and the overall stability of the device are improved; the transm