发明名称 |
Vacuum pump control apparatus for an evacuating type waste water collecting system |
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 vacuum sewer pipes provided with a negative pressure therein, and the waste water collected in the water collecting tank is discharged by a booster pump while the air in the water collecting tank is discharged by a vacuum pump. The vacuum pump control apparatus comprises a gas-liquid ratio detection arrangement for detecting the ratio of the amount of air to the amount of waste water to be collected into the water collecting tank, and a control system for regulating the operating time of the vacuum pump based upon the gas-liquid ratio detected by the gas-liquid ratio detecting arrangement, so that a target value of the gas-liquid ratio is recovered when it falls below the target value. By this apparatus, the gas-liquid ratio within the vacuum sewer pipes is kept to an ideal value to thereby prevent an air lock from forming in the vacuum sewer pipes.
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申请公布号 |
US5487646(A) |
申请公布日期 |
1996.01.30 |
申请号 |
US19940316715 |
申请日期 |
1994.09.30 |
申请人 |
EBARA CORPORATION |
发明人 |
USHITORA, AKIHIRO;YAMAGUCHI, KAZUO;ASANAGI, TSUNEO |
分类号 |
E03F1/00;(IPC1-7):F04B41/02;F04B49/02 |
主分类号 |
E03F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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