Corrosion-proof and leakage-proof stop valve

The utility model provides a corrosion-proof and leakage-proof stop valve. The corrosion-proof and leakage-proof stop valve comprises a valve body, a valve rod, a valve cover, a valve clack, a pressing cap and a hand wheel, wherein the valve body is provided with a liquid inlet, a liquid outlet and a valve port, the valve clack is located in the cavity of the valve body and connected with the lower end of the valve rod, the upper end of the valve rod penetrates through the valve cover and the pressing cap, the pressing cap is located at the upper portion of the valve cover, and the upper end of the valve rod is fixedly connected with the hand wheel. The corrosion-proof and leakage-proof stop valve is characterized by further comprising a valve rod casing pipe and a valve clack sleeve, wherein the valve rod casing pipe is fixedly connected to the lower middle portion of the valve rod, the valve clack sleeve is fixedly connected to the valve clack, the valve rod casing pipe and the valve clack sleeve are connected in a sealing mode, threads consistent with the valve rod are arranged on the outer wall of the valve rod casing pipe, the height of the valve rod casing pipe is larger than the lift of the valve clack, the valve clack sleeve is matched with the valve clack in shape, and the valve rod casing pipe and the valve clack sleeve are respectively made of a corrosion-proof and wear-proof material. According to the corrosion-proof and leakage-proof stop valve, the phenomenon that the valve rod and valve clack are corroded and rusted after being soaked in liquid for a long time can be avoided, so that the service life of the valve rod and the valve clack is prolonged, and valve inner leakage caused by corrosion and scratches of a sealing surface is avoided.