초록 ▼

A vacuum sewer system comprises a normally closed sewer valve connected between the outlet opening of a waste receiving unit to be emptied and a sewer pipe, and an ejector. The ejector is an integrated part of the sewer pipe. The sewer pipe includes one portion forming a suction pipe of the ejector

A vacuum sewer system comprises a normally closed sewer valve connected between the outlet opening of a waste receiving unit to be emptied and a sewer pipe, and an ejector. The ejector is an integrated part of the sewer pipe. The sewer pipe includes one portion forming a suction pipe of the ejector and another portion forming a discharge pipe of the ejector.

대표청구항 ▼

[ I claim:] [1.] An improved vacuum sewer system of the kind comprising at least one waste receiving unit to be emptied, said unit having an outlet opening, a sewer pipe having an upstream end and a downstream end, a normally closed sewer valve at the outlet opening of the waste receiving unit and c

[ I claim:] [1.] An improved vacuum sewer system of the kind comprising at least one waste receiving unit to be emptied, said unit having an outlet opening, a sewer pipe having an upstream end and a downstream end, a normally closed sewer valve at the outlet opening of the waste receiving unit and connected between the outlet opening of the waste receiving unit and the upstream end of the sewer pipe, a sewage collecting container connected to the sewer pipe at the downstream end thereof for collecting sewage from the sewer pipe, an ejector having a suction pipe in communication with the sewer pipe, a discharge pipe, and a working medium supply inlet, whereby a considerable partial vacuum is created in the suction pipe when the sewer valve is in closed position and a pressurized working medium is supplied to the ejector by way of the working medium supply inlet so that sewage in the waste receiving unit is forced into the sewer pipe when the sewer valve is opened,wherein the improvement resides in that the ejector is a gas-driven ejector and is integrated into the sewer pipe so that the suction pipe and the discharge pipe of the ejector form respective parts of the sewer pipe, thereby dividing the sewer pipe into an upstream portion, in which sewage is transported due to pressure difference between the ambient atmosphere and partial vacuum created by the ejector, and a downstream portion, in which sewage transport is at least assisted by pneumatic pressure created by the ejector in its discharge pipe.