| 摘要 |
A tube type check valve having a float for a sewer is provided to discharge sewage and to cut off the counter flow of sewage effectively by opening and closing a tube body with a float ascending according to the water level of a river. A tube type check valve having a float for a sewer comprises an elastic tube body(11) installed to connect with the end of a sewer adjacent to a river to form a passage for discharging sewage flew inward from the sewer to a river and made of resin materials such as rubber having contractibility, and an opening and closing device(20) installed to the outer circumferential surface of the elastic tube body, and pressurizing and closing the elastic tube body to cut off the counter flow of the sewage when the water level of river rises. The opening and closing device comprises a housing surrounding the tube body and coupled with the sewer, a pinch bar(21) installed to the inside of the housing to be movable vertically from the outer circumferential surface of the tube body, and a float(27) installed to a shaft seal(25) connected with the pinch bar via the inside and outside of the housing and ascending along the water level of river to supply pressure force for pressurizing the tube body to the pinch bar. |
