| 摘要 |
<p>PURPOSE:To provide strong turning force for drainage to prevent a drain trap from flooding by twisting subsequently an inlet pipe downward, and leading drainage to a spirally bent joint of each side of a water collecting section from risers and branch pipes. CONSTITUTION:An inlet pipe 13 is formed as a circumferential wall surface 13a which is in the shape of a projection and recession along the circumferential direction and is subsequently twisted downward, and a water collecting section 12 is also formed so that each side is bent spirally with the same forms as that thereof. Drainage flowing down the inside of the inlet pipe 13 from risers is led by each projected and recessed circumferential wall surface 13a to change into turning stream during the flowing-down. Turning force is also given to drainage flowing into a large diameter section 11 from branch pipes through connections 14 of the branch pipes, and it is led by a wing body 12d to change into further powerful turning stream to discharge. According to the constitution, the drainage forms the core of air passing through in each riser, a variation of air-pressure in a drain-pipe, and the flooding of a drain trap can be prevented.</p> |
