Novel butterfly type double-plate check valve

The invention discloses a novel butterfly type double-plate check valve. The novel butterfly type double-plate check valve comprises a valve body and a water passing hole formed in the valve body and used for water passing. An interception assembly used for one-way communication is arranged in the water passing hole in a matched manner. The interception assembly comprises an inner ring plate arranged in an inner cavity of the valve body. Two sealing openings of a semicircular structure are formed in the inner ring plate. Semicircular sealing rings of a closed structure are arranged on the surfaces of the portions, on the outer sides of the sealing openings, of the inner ring plate. According to the novel butterfly type double-plate check valve, holes do not need to be punched in the two sides of the valve body, a valve rod is directly placed in the valve body, and the overall sealing performance of the valve body is guaranteed; and a flow guide piece is arranged on the back face of a butterfly plate, during w