| 摘要 |
A manhole for preventing backflow and stench is provided to prevent the sewage and the stench from being back-flowed by blocking the discharge pipe and discharge ball through opening/closing balls when the sewage is not flowed and when the sewage is back-flowed. A manhole(10) for preventing backflow and stench is composed of the manhole having an installing end(12) to install a steel grating(11) and a discharge pipe(14) connected with a sewer(13); a pair of inner manholes(20) having a hanging end(21) at the outer surface of the upper part, a knob(22), a combining end(23) vertically formed with plural bolt holes(23c) by using bolts(23a) and nuts(23b) at both ends, at least one discharge hole(24a) at a floor surface(24), and a discharge pipe(26) integrally formed with a male screw(26a) at the outer peripheral surface; an opening/closing ball(30) inserted at an opening/closing ball moving pipe of the inner manhole; a filtering cap(40) formed with a female screw(41) at the inner peripheral surface; and a filtering net(50) inserted at the filtering cap and mounted at the hanging end. |
