Heating fluid pipeline flow overload protection device

The utility model discloses a heating fluid pipeline flow overload protection device which comprises a pipe body and a valve element, the left side of the pipe body is provided with installation threads and an installation opening, the right side of the installation opening is provided with a valve opening, the right side of the valve opening is provided with a buffering cavity, a liquid discharging pipe is arranged below the buffering cavity, the valve element is arranged in the pipe body, and the left end of the valve element is provided with a rubber water-resisting layer. A sliding block is arranged at the lower end of the valve element, a rotating groove is formed in the right end of the valve element, a rotating block is arranged in the rotating groove, the right end of the rotating block is fixedly connected with the left end of a spring, the right end of the spring is fixedly connected with the left end of a pressure regulator, and the right end of the pressure regulator is fixedly connected with the