Acid-resisting high-strength stop valve

The invention discloses an acid-resisting high-strength stop valve which comprises a valve body, a valve cover and a valve element assembly. A liquid inlet channel is arranged at one end of the valvebody, and a liquid outlet channel is arranged at the other end of the valve body. A valve cavity is arranged in the middle in the valve body. A sealing assembly in sealing fit with the tail end, located in the valve body, of the liquid inlet channel is arranged on the valve element assembly. The valve element assembly comprises a valve rod and a valve element. The bottom of the valve rod is fixedly connected with the valve element. A circle of first groove is formed in the bottom of the valve element. The sealing assembly comprises a first sealing ring mounted in the first grove. The cross section of the first sealing ring is in an inverted L shape. A circle of protruding portion is fixedly arranged at the position, communicating with the liquid inlet channel, of the valve cavity. When theprotruding portion, the f