Blowing-assisting and blockage-removing valve

The utility model relates to the technical field of pipeline transportation, and discloses a blowing-assisting and blockage-removing valve which comprises a valve body and a valve cover fixedly connected to the valve body, an air outlet hole is formed in the valve cover, and a first cavity, a second cavity and an air inlet cavity which are communicated in sequence are formed in the valve body. A piston and a valve element are slidably connected into the first cavity and the air inlet cavity respectively, an ejector rod is arranged between the valve element and the piston, an air inlet pipe is detachably connected to an opening of the air inlet cavity, a compression spring is arranged between the air inlet pipe and the valve element, and two L-shaped air cavities are symmetrically formed in the valve body. One end of each L-shaped air cavity is communicated with the first cavity, and the other end of each L-shaped air cavity is communicated with the second cavity. According to the blowing-assisting blockage re