| 摘要 |
This storage tank is provided with: a storage-tank main body (32) capable of storing a liquid flowing into the inside thereof from the upstream side; a flow-path reduction part (36S) which is provided to the downstream side of the storage-tank main body (32), and has a flow path cross-sectional area at the downstream side which is smaller than that at the upstream side; an outlet (OUT) which is provided to the downstream side of the flow-path reduction part (36S), and which allows the liquid to flow out to the exterior of the storage-tank main body (32); and an inner wall surface (36E) which is provided to a section of the flow-path reduction part (36S), and which protrudes towards the outside of the flow-path reduction part (36S). The storage tank is used to build a siphon-type drainage system. An outflow-pipe connection member (36) is provided with the flow-path reduction part (36S) and the outlet (OUT), and is attached to the storage-tank main body (32). |
