Culvert of vacuum sewerage
AssigneeInax Corporation
InventorJunichi Yamanaka
Life of this patent
Estimating the term…
Abstract
An inverted siphon culvert of a vacuum sewerage in which a reduction in vacuum caused by a head at the time of passing under an obstacle such as a river is prevented. An upstream vacuum sewer 2 provided at one side of a river 1 and a downstream vacuum sewer 3 provided at the other side are connected by a water flow pipe 4 and an air pipe 5 passing under the river 1. Sewage water in the upstream vacuum sewer 2 flows into the downstream vacuum sewer 3 through the water flow pipe 4. The vacuum transmitted from a vacuum station to the downstream vacuum sewer 3 is transmitted to the upstream vacuum sewer 2 through the air pipe 5 without being reduced substantially.
Claims9
A culvert of a vacuum sewerage in which an upstream vacuum sewer provided at one side of an obstacle and having a lower end, and a downstream vacuum sewer provided at the other side of the obstacle and having an upper end located lower than the lower end of the upstream vacuum sewer, are connected, said culvert comprising:
- a water flow pipe passing under said obstacle to connect said upstream vacuum sewer and said downstream vacuum sewer;
- and
- an air pipe passing along one of upper and lower sides of said obstacle to connect said upstream vacuum sewer and said downstream vacuum sewer, said air pipe having end portions connected to the upstream and downstream vacuum sewers and disposed to orient at least partly upwardly from the sewers so that liquid inside the sewer does not enter into the air pipe to allow vacuum force in the downstream vacuum sewer to smoothly transfer to the upstream vacuum sewer without substantial vacuum loss in the water flow pipe flowing under the obstacle.
A culvert for a vacuum sewerage system for crossing an obstacle, comprising:
- an upstream vacuum sewer provided at one side of the obstacle and having a lower end near the obstacle,
- a downstream vacuum sewer provided at the other side of the obstacle and having an upper end near the obstacle, said upper end being located lower than the lower end of the upstream vacuum sewer,
- a water flow pipe passing under said obstacle and through a portion located lower than the upper end of the downstream vacuum sewer, said water flow pipe being connected between the lower end of the upstream vacuum sewer and the upper end of the downstream vacuum sewer;
- and
- an air pipe passing along one of upper and lower sides of said obstacle to connect said upstream vacuum sewer and said downstream vacuum sewer, said air pipe having front and rear end portions connected to the upstream and downstream vacuum sewers, respectively, said front and rear end portions orienting at least partly upwardly from the respective sewers so that liquid flowing inside the sewer flows only through the water flow pipe without entering into the air pipe to allow vacuum force in the downstream vacuum sewer to smoothly transfer to the upstream vacuum sewer without substantial vacuum loss in the water flow pipe flowing under the obstacle.
Dependencies are inferred from the claim text.