Water-air coupled high-efficient irrigation system

Abstract

The invention discloses a water-air coupled high-efficient irrigation system, comprising a water delivery main pipe (12). One end of the water delivery main pipe (12) is in communicated connection with a water source (1) and is in communicated connection with a bubbleless aeration water-air mixing tank (3) with a hydrophobic hollow fiber membrane assembly (4); and the other end of the water delivery main pipe (12) is in communicated with an irrigation device. The water-air coupled high-efficient irrigation system is characterized in that one end of the hydrophobic hollow fiber membrane assembly (4) is communicated with an air compressor (6) and the other end of the hydrophobic hollow fiber membrane assembly (4) is provided with a second air conducting pipe (16); the water delivery main pipe (12) is provided with a water pump (2), a water pressure and flow regulation valve (14), a first pressure measuring instrument (13) and a second pressure measuring instrument (15). The mixing of air is finished through the hollow fiber membrane assembly; the utilization rate of oxygen can reach 100 percent in theory; the water-air coupled high-efficient irrigation system solves the problems of transient oxygen deficiency of plant roots during irrigation, low utilization rate of oxygen and high consumption of energy and the like when the mixing of air is finished by using a Venturi jet aerator; moreover, a dropper capillary and a watering device do not need to be buried in soil, the convenience in maintenance and inspection of the watering device is realized and the water-air coupled high-efficient drop irrigation, spray irrigation and surface irrigation can be realized.

Description

Technical field: [0001] The invention relates to the technical field of agricultural irrigation, in particular to a high-efficiency water-air coupling irrigation system. Background technique: [0002] Soil air comes from the atmosphere and exists in various soil pores. Whether the soil is in the process of dehumidification or moisture absorption, water always occupies the smaller pores first, and air preferentially occupies the larger pores. The quality of soil aeration is mainly determined by the total porosity, pore connectivity and ventilation porosity of the soil. Soil macropores are the main channels for soil ventilation, and the number and proportion of soil macropores are the internal factors that determine soil aeration capacity. After irrigation or rainfall, the crop rhizosphere soil is filled with water, and the gas in the soil is forced to discharge, resulting in poor ventilation of the crop root soil, O 2 insufficient. If the soil CO 2 The content is too high...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a water-air coupling high-efficiency irrigation system, which mainly solves the problems caused by the existing irrigation technology during irrigation. The root system of the plant is temporarily hypoxic and the oxygen utilization rate is low when the Mazzei Venturi jet is used to complete the air incorporation. In particular, the existing water-gas coupling irrigation technology must require the dropper capillary to be buried in the soil, increasing The risk of blocking the emitter is reduced, and at the same time, it causes great inconvenience to the maintenance and inspection of the emitter

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