Negative-pressure pipeline type filtration irrigation device

Abstract

The invention provides a negative-pressure pipeline type filtration irrigation device which relates to the technical field of farmland watering. The filtration irrigation device comprises a water storage vessel, the upper part of which is provided with a water-replenishing mechanism and a pressure-regulating device; the lower part of the water storage vessel is communicated with the water inlet end of a water-percolating device; the water outlet end of the water-percolating device is communicated with the upper part of the water storage vessel; a water-percolating apparatus is arranged on thewater-percolating device; and the pressure-regulating device is an external-connection-type water column pressure-regulating apparatus or pressure-regulating valve. The invention has the advantages ofovercoming the shortages of the prior art, being capable of leading the irrigation water to be maintained within the soil layer range where the plant root system is the most active, thereby minimizing soil surface evaporation and deep seepage, saving water and energy, and reducing labor intensity, being capable of fixing the water irrigation amount and speed according to the water demand law of plants, and achieving scientific water supply; and the invention also has the advantages of simple structure, convenient operation and use, unique principle, stable work and wide application scope, andthus can generate greater economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of farmland watering. Background technique [0002] my country is a country that lacks both land resources and fresh water resources. In order to solve the problem of saving water in agricultural irrigation, the applicant once applied for a patent of "Negative Pressure Seepage Control Micro-irrigation Device", the publication number of which is CN2870448Y. The device is a pipelined low-pressure, micro-infiltration irrigation equipment. Its characteristics are: it uses the mutual balance of the five forces of the natural atmosphere, negative pressure, water column pressure, soil water absorption and water holding capacity of the infiltrator, causing the air inlet to be like a The "automatic switch" is constantly turned off and on. In principle, this switch can make the irrigation system work automatically, and can keep the soil water content stable within the set range, which is beneficial to realize automat...

AI Technical Summary

Problems solved by technology

The device is a pipelined low-pressure, micro-infiltration irrigation equipment. It is characterized in that it uses the mutual balance of the five forces of the natural atmosphere, negative pressure, water column pressure, soil water absorption, and water holding capacity of the infiltrator, causing the air inlet to be like a The "automatic switch" is constantly closed and opened. This kind of switch can make the irrigation system work automatically in principle, and can keep the soil water content stable within the set range, which is conducive to the realization of automatic irrigation according to the soil humidity. There are problems such as inaccurate control of soil moisture content, inaccurate pressure regulation, inconvenient (need to adjust in the pit), slow establishment of normal working state and unstable work.

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