Multilevel distribution type constant pressure irrigation system

Abstract

The invention relates to a multilevel distribution type constant pressure irrigation system, which comprises a primary constant pressure water supply system and constant pressure maintaining type water flow servo valves for implementing secondary constant pressure water supply. A spray irrigation unit requiring high water pressure is directly connected to the primary constant pressure water supply system with optimal constant sprinkling irrigation water pressure, and a microspray irrigation unit and a drip irrigation unit which require lower water pressure pass through the constant pressure maintaining type water flow servo valve and another constant pressure maintaining type water flow servo valve respectively prior to being connected to the primary constant pressure water supply system,wherein one constant pressure maintaining type water flow servo valve has water supply pressure constant at optimal microspray irrigation water supply pressure, and the other constant pressure maintaining type water flow servo valve has water supply pressure constant at optimal drip irrigation water supply pressure. Difference of water supply pressure of spray irrigation, microspray irrigation and drip irrigation is fully utilized, and the multilevel distribution type constant pressure irrigation system has the advantages of low input, high reliability and convenience in management. The multilevel distribution type constant pressure irrigation system is flexible and convenient, capable of supplying water at constant pressure to the spray irrigation unit, the microspray irrigation unit andthe drip irrigation unit which have different water supply pressure requirements, not limited by planting structure, planting scale and irrigation modes, and quite suitable for existing agricultural production and operation modes with operation in family units.

Description

Technical field: [0001] The invention belongs to the technical field of farmland irrigation, in particular to a multi-stage distributed constant pressure irrigation system. Background technique: [0002] The so-called constant pressure irrigation refers to an irrigation water supply method in which the irrigation water pressure is constant within the optimal water pressure range and does not change due to changes in the irrigation water flow. It has the characteristics of high uniformity of irrigation, less damage to pipeline equipment, water saving, energy saving and high automation. [0003] Because of its unique advantages, constant-pressure irrigation has gained a lot of attention since 1984 when the Institute of Farmland Irrigation of the Chinese Academy of Agricultural Sciences (the Institute of Farmland Irrigation of the Ministry of Water Resources) and other units built the first constant-pressure sprinkler irrigation test project in Jiaxian County, Henan Province. ...

AI Technical Summary

Problems solved by technology

Because it cannot adapt to most rural areas of our country, the current agricultural production and operation mode of different planting structures, different operating scales, different irrigation methods, and the coexistence of large fields and greenhouses with one household as the business unit greatly limits the application of this advanced technology. Promote application

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