Submerged drainage grinder pump, pipe transfer vortex accelerator, and sewage transfer system using the same

PURPOSE: An underwater crushing drainage pump, a pipe transferring vortex accelerator, and a sewage transferring system using the same are provided to effectively suck sewage and foreign materials included in sewage by using a vortex effect and to crush foreign materials, thereby smoothly transferring sewage. CONSTITUTION: An underwater crushing drainage pump includes a pump body (100) and a plurality of vortex legs (110). The pump body includes a motor (140) and a blade unit (200) inside. The vortex legs are connected to the outside of the pump body. The vortex legs are formed into a shape causing a vortex effect of fluid flowing into the underwater crushing drainage pump.