Impeller type water-hammer proof and silent check valve

Abstract

An impeller type water-hammer proof and silent check valve includes a shell (2), a sealing ring (3), a cowl (4), a flow guide body (5) and a spring (7). Turbulent-flow blades (1) are provided on the outer surface of the flow guide body (5). Two groups of axial-flow blades are arranged in the flow passage, and the blades are fixed on the streamline outer surface of the flow guide body (5). The valve continuously converts pressure energy and kinetic energy to a torque surrounding an axial direction to the flow guide body (5) during a process of backflow liquid flowing through the turbulent-flow blades (1). The valve forms a pair of torques counteracting each other as the turbulent-flow directions of the two groups of blades are opposite. The liquid pressure energy and kinetic energy are continuously and gradually converted to the torque to the flow guide body (5) in the turbulent-flow blades (1), so that an abrupt impact to the valve by the water hammer is eliminated.

Dependencies are inferred from the claim text.