One-way sealing ball valve

The utility model relates to the technical field of sealing ball valves, in particular to a one-way sealing ball valve. Comprising a valve body; a pressure relief pipe is installed below the hole, a limiting plate is installed in the pressure relief pipe, a hole is formed in the middle of the limiting plate, a first spring is arranged below the hole, a baffle is arranged below the first spring, a hole is formed in the bottom of the pressure relief pipe, and a pull rod penetrating through the hole formed in the bottom of the pressure relief pipe is arranged below the baffle. By pulling the pull rod upwards, the pull rod can drive the baffle to move upwards, after the baffle moves upwards, liquid or other media in the cavity can flow into the pressure relief pipe through the hole formed in the limiting plate and then flow out through the gap between the baffle and the pressure relief pipe, and then the liquid in the cavity is discharged; the purpose of discharging liquid or other media in the cavity is achieved