| 摘要 |
<p>A vacuum-type sewage collecting apparatus arranged in such a manner that sewage discharged from the houses or facilities is once accumulated in a cesspool and the sewage accumulated in the cesspool is then collected in a predetermined portion through a vacuum valve and a vacuum sewage pipe the inner pressure of which has been made to be a negative pressure is disclosed. The vacuum valve being operated by negative pressure taken up from a vacuum source and supplied to the vacuum valve via a connecting pipe. The negative pressure for operating the vacuum valve is taken up from a vacuum sewage pipe portion which is elevated at a level higher than that of the vacuum valve in the down stream of the vacuum valve. Instead, the negative pressure may be directly taken up from an accumulating tank the inner pressure of which has been made to be a negative pressure by a vacuum pump, a pipe which establishes a connection between the accumulating tank and the vacuum pump or a tank connected to the pipe connecting between the accumulating tank and the vacuum pump. In this way, a high negative pressure can be supplied to the vacuum valve to effectively and completely open the vacuum valve to thereby perform efficient discharge of the sewage through the same valve.</p> |
