| 摘要 |
A multi-filtration auto-irrigation/drainage tube (1) comprises: a tube body (15) having a first irrigation/drainage channel (4), a second irrigation/drainage channel (5), a third irrigation/drainage channel (6), a first irrigation/drainage opening (2), a second irrigation/drainage opening (32) and a third irrigation/drainage opening (31) arranged therein; the first irrigation/drainage opening (2) is a first filtration layer having first filtration water holes (21) distributed uniformly thereon, the second irrigation/drainage opening (32) is a second filtration layer having second filtration water holes (34) distributed uniformly thereon, and the third irrigation/drainage opening (31) is a third filtration layer having third filtration water holes (33) distributed uniformly thereon; the first irrigation/drainage opening (2) is arranged on the wall of the tube body (15), the second irrigation/drainage opening (32) is arranged between the third irrigation/drainage channel (6) and the second irrigation/drainage channel (5), and the third irrigation/drainage opening (31) is arranged between the second irrigation/drainage channel (5) and the first irrigation/drainage channel (4), wherein, during drainage, water passes through the first filtration layer, the second filtration layer, the third filtration layer and the first irrigation/drainage channel (4), and is then discharged; and during irrigation, water passes through the first irrigation/drainage channel (4), the third filtration layer, the second filtration layer and the first filtration layer, and is then discharged. |
