| 摘要 |
A novel pressure-less irrigation device, comprising a novel irrigator, the novel irrigator comprising an isodiametric downstream tee (1), an isodiametric downstream tee horizontal water inlet end (1-1), an isodiametric downstream tee horizontal water outlet end (1-2), an isodiametric downstream tee vertical water inlet end (1-3), a connecting tube (2), a reducer (3), a soil saturation water layer formation tube (4), a porous permeable plate (5), a gravel filtration layer (6) and backfill soil (7). The irrigation device evenly conveys irrigation water to crop plant root systems, and on the basis of a "connector" principle and the size of a flow cross-section, necessarily satisfies a "loss-less conveyance" very low flow speed requirement of the "connector" in a static pressure dominant operating state, thereby eliminating the problem of irrigator blockage which accompanies energy dissipation. Under the effect of a capillary force of the soil and a water potential energy difference of the soil, the plants and the atmosphere, water of a soil saturation water layer within the soil saturation water layer formation tube enters the atmosphere via crop plant transpiration so that the height of the soil saturation water layer falls, and on the basis of the "connector" principle, a water supply water level control pool at a head portion is triggered to replenish the water. The water consumption and water replenishment are adaptive, and human intervention and additional energy are not required. The present invention implements low-cost "fool-proof" automatic irrigation and truly even irrigation. |
