| 摘要 |
PROBLEM TO BE SOLVED: To buffer water hammer action due to drainage of non-constant quantity, obstruct air pressure variation and ascending of drainage, and smoothly drain water, by joining a plurality of vertical pipe systems with horizontal pipes, providing a specific bend on the way of an upper stream side horizontal pipe, setting confluence on the middle of a lower stream straight pipe, and submerging the extreme end of the horizontal pipe. SOLUTION: Drainage flowing in from a water receiving vessel 1 is substituted with trap sealing water to flow in a horizontal pipe 3, and falls from the associated part joint 4 of a vertical pipe to vertical pipes 5, 5'. The drainage revolvingly flows in from 90 deg. bend 6a enlarged in pipe diameter to horizontal pipes 7, 7', water hammer action is added to the upper stream side of a bend 8 or a confluent part deformed pipe 10, and water hammer action is added to an inflow pipe 12 through a horizontal main pipe 11. The extreme end 14 of an introducing pipe 13 is in the opened condition to submerge in a water level 16. Hereat, a buffering air pipe 18a of double pipe construction with a built-in vacuum break intake mechanism 26b in a buffer space and a buffering air pipe 25a on a horizontal pipe are provided on the parts to which the water hammer action is added. Hereby, water hammer on the lower stream of a vertical pipe leg part bend can be buffered.
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