| 摘要 |
A backflow prevention structure of a manhole connected with a sewer pipe is provided to prevent a road and a house from being submerged by preventing a back flow of sewage, and not to injure a user's health by bacteria by keeping an offensive odor and various bacteria not to be exposed from a manhole. A backflow prevention structure of a manhole connected with a sewer pipe includes an inflow pipe(100) where sewage flows inward, a manhole main body(200) formed in the shape of a rectangular box having an opening at the top, laid under the ground and connected to the inflow pipe, a filter(300) provided with many through holes(h) and installed to the opening of the manhole main body to prevent the inflow of impurities to the inside of the manhole main body, an outflow pipe(400) connected to the manhole main body, an opening and closing plate(500) installed to the inside of the manhole main body and floated horizontally by buoyancy when the water level inside the manhole main body rises to stop up the opening of the manhole main body and to prevent a back flow of the water inside the manhole main body, a movement limiter(600) limiting the movement of the opening and closing plate, a sediment removal plate(700) having non-woven fabrics(710) and drain holes(H) to filter out sediment inside the manhole main body, a lifting device lifting up and down the sediment removal plate in the manhole main body, a sensor(900) having a load measurement device to measure resistance and to measure the accumulation of sediment, a control unit connected with the sensor to operate an alarm device when the measured torque by the load measurement device exceeds the appointed torque, and an alarm device(1100) connected to the control unit and provided with a display device such as LED or a sound device such as a speaker to output visual or auditory signals. |
