Device for preventing water flow of water pipe from flowing back

The utility model provides a device for preventing water flow of a water pipe from flowing back, which comprises a shell, a rotor is rotatably connected in the shell, a water inlet and a water outlet are symmetrically arranged on the periphery of the shell, a connecting pipeline matched with the water inlet and the water outlet is arranged on the periphery of the rotor, a notch is arranged at the water inlet end of the connecting pipeline, and the water outlet end of the connecting pipeline is provided with a water outlet. A rotor slewing mechanism is installed in the shell, the shell comprises a disc-shaped shell body, the front side of the disc-shaped shell body is not closed to form an opening of the shell for the rotor to enter, a gland is screwed and fixed on the opening, and cylindrical supporting columns are arranged in the middle of the front end face and the middle of the rear end face of the rotor. The utility model is reasonable in design, solves the problem of water flow backflow of the water pipe