| 摘要 |
A back-washing device of an infiltration gallery is provided to flow out granular sediment accumulated on a filter layer with an infiltration gallery toward the lower reaches of a river and to secure stable catchments by flowing backward using water gathered in a perforated pipe and rising to the surface of water. A back-washing device of an infiltration gallery contains a rubber hose(3) on the inside of a perforated pipe of an infiltration gallery vertically and installed to the inside of a perforated pipe(7) having a water collecting hole(8) by driving a built-in steel wire(4) toward the outside of a collecting well using the rotation of a ball, a ball(5) fixed with the rubber hose by fixing a round bar with a Ý‹-shaped steel flat bar using a fixing pin, a steel pipe(2) coupled with a straight pipe and a curved pipe(12) by welding, fixed to the wall of the collecting well by a pipe hanger(13) and an anchor bolt and coupled with the rubber hose by a pipe band, and a pneumatic device(1) provided with an air outlet and connected with the steel pipe by inserting a rubber packing in a plate flange and joining with a bolt and a nut. |
