Emitter for pressureless irrigation

Abstract

The invention belongs to the technical field of farmland irrigation, and in particular relates to a novel sprinkler for a novel pressureless irrigation device. Including: downstream tee, connecting pipe, large and small heads, soil saturated water layer forming pipe, porous permeable plate, sand and gravel reverse filter layer and backfill soil, the vertical end of the downstream tee is connected with the small end of the large and small heads, and the soil saturated water layer The lower end of the forming pipe is inserted into the large end of the large and small head. The bottom of the pipe is a porous permeable plate, on which a sand and gravel reverse filter layer is placed, and the top is backfilled with soil. The top of the soil saturated water layer forming pipe is 40 cm to 45 cm away from the soil surface. The adjustment height of the saturated water layer is from the bottom of the backfill soil to the top of the soil saturated water layer forming pipe. It is sturdy and durable, and easy to construct. In particular, it is convenient to adjust the height of the soil saturated water layer that rises through the soil capillary water to supply water to the root layer of the crops, ensuring that the new pressureless irrigation system is always at the optimum level under the conditions of different water needs in different growth periods of the crops. Characteristics of excellent irrigation status.

Description

Technical field: [0001] The invention belongs to the technical field of farmland irrigation, in particular to an irrigator for a pressureless irrigation device. Background technique: [0002] The invention patent with the publication number CN 102160518 A - a new pressureless irrigation device, adopts an irrigator with a U-shaped concrete tank as the basic structure (see the patent specification "New Pressureless Irrigation Device" for details). There are the following defects: first, on-site construction requires high-precision concrete pouring and forming equipment, and there are a series of technical problems such as anti-seepage treatment of frost heave expansion joints, which requires a large investment and high difficulty; second, the concrete U-shaped groove is a brittle material that is easily damaged Frost heave, uneven subsidence, and damage caused by farming machinery; the most important defect is the inability to adjust the height of the soil saturated water laye...

AI Technical Summary

Problems solved by technology

There are the following defects: first, on-site construction requires high-precision concrete pouring and forming equipment, and there are a series of technical problems such as anti-seepage treatment of frost heave expansion joints, which requires a large investment and high difficulty; second, the concrete U-shaped groove is a brittle material that is easily damaged Frost heave, uneven subsidence, and damage from farming machinery; the most important defect is the inability to adjust the height of the soil-saturated water layer that is supplied to the crop root zone by rising capillary water in the soil

Similarly, the common problem of insufficient water supply in the surface soil at the seedling stage after subsurface irrigation can not be cured by raising the height of the soil saturated water layer.

Images