High-safety drain valve

The utility model discloses a high safety drain valve which comprises a drain valve body, an air inlet pipe and an exhaust pipe are arranged on the drain valve body, a rotating groove is formed in one side of the air inlet pipe, a rotating ring is movably installed in the rotating groove, two sliding grooves are formed in the inner wall of one side of the rotating groove, and the rotating ring is movably installed in the sliding grooves. According to the high-safety drain valve, the filter plate is installed in the air inlet pipe of the drain valve body, the rotating ring can be driven to rotate by stirring the rotating supporting column, the rotating ring can move under the action of the external threads and the internal threads, the sliding blocks can be driven to move in the sliding grooves, and therefore the filter plate is arranged in the air inlet pipe of the drain valve body; and along with continuous rotation of the rotating ring, the sliding block and the filter plate can be driven to move, and the f