device for controlling a vacuum pump for a wastewater collection and evakuiersystem.

摘要

A vacuum pump control apparatus for an evacuating type waste water collecting system is disclosed. In the system, waste water discharged from houses and facilities is collected into a water collecting tank by means of vacuum sewer pipes provided with a negative pressure therein and the waste water collected in the water collecting tank is discharged by means of a booster pump while the air in the water collecting tank is discharged by means of a vacuum pump. The vacuum pump control apparatus comprises gas-liquid ratio detection means for detecting the ratio of the amount of air to the amount of waste water to be collected into the water collecting tank; and control means for controlling the operating time of the vacuum pump based on the gas-liquid ratio detected by the gas-liquid ratio detecting means so that a target value of the gas-liquid ratio is recovered when it falls below the target value. By this arrangement, the gas-liquid ratio within the vacuum sewer pipes is kept to an ideal value to thereby prevent an air lock forming in the vacuum sewer pipes.