| 摘要 |
PURPOSE: A subterranean water pollution prevention device having a check valve is provided to prevent the backflow of water into a tube well from a water tank by installing a check valve to a guide pipe connector. CONSTITUTION: A subterranean water pollution prevention device having a check valve comprises a guide pipe(140), a guide pipe connector and a contact support. The guide pipe connector includes: a ring-shaped hanging projection formed along the inner circumference of a discharge port(121) on the part adjacent to the guide pipe; a pin insertion groove formed in the type of a long groove in the horizontal direction of the discharge port on two inner sides of the discharge port at the backside of the ring-shaped hanging projection; and a check valve(124) contacted with the backside of the ring-shaped hanging projection to open and close the space between the inside of the guide pipe and the discharge port, and supported to two sides of an internal wall of the discharge port of the guide pipe connector to be rotatable. |
