| 摘要 |
A drain trap for preventing the counterflow of foam is provided to prevent foam from flowing backward when waste water is drained and to release rainwater selectively, to use for various purposes and to discharge rainwater, waste water and water discharged from a flower bed simultaneously or selectively. A drain trap for preventing the counterflow of foam is formed by connecting a first drain tank(10) opened upward to make rainwater flow in and provided with an inflow pipe(11) with a second drain tank(20) opened upward to make waste water flow in by a connecting pipe(30), and installing to a concrete slab surface integrally, wherein bearing grooves are formed on the inflow pipe and the connecting pipe integrally to support a shield unit(50) for cutting off unidirectional inflow. In addition, the shield unit is provided with a hanging projection(53) formed on one end of a body(51) formed to insert to a pipe and corresponded to a bearing groove, and inclined at the other end of the body and connected with a shield membrane(55), and the first drain tank is coupled with a separation cap(60) to use the first drain tank selectively by uses. |
