Soil automatic control type irrigation device

Abstract

The embodiments of the invention disclose a soil automatic control type irrigation device, comprising an irrigator, a flexible plastic pipe, a polyurethane elastomer and a fixed ring sleeve without elasticity, wherein one end of the flexible plastic pipe is connected with the irrigator, and the other end of the flexible plastic pipe is connected with an external pressure water source providing irrigation water; the polyurethane elastomer clings to the flexible plastic pipe; the fixed ring sleeve without elasticity is tightly hooped on the polyurethane elastomer and the flexible plastic pipe and cannot slide freely; the polyurethane elastomer has properties of water absorption swelling and water loss shrinkage, and the elastic force generated by the water absorption swelling is greater than the elastic force generated by deformation of the flexible plastic pipe; and the polyurethane elastomer is in embedded type contact with soil requiring irrigation. By use of the soil automatic control type irrigation device disclosed by the invention, the field irrigation efficiency can be improved.

Description

technical field [0001] The invention relates to agricultural irrigation technology, in particular to a soil self-control irrigation device. Background technique [0002] The water transpired by crops in the process of growth and development is often hundreds or even tens of thousands of times of their own biomass. Since the soil is often difficult to provide the water necessary for the growth and development of crops, in the process of modern agricultural production, through irrigation Replenishing water to the soil, and then meeting the water demand of crops, is an essential agricultural activity. However, the waste of irrigation water resources in this traditional irrigation method is relatively serious, and my country is a country with very scarce water resources. The per capita water resources are less than 25% of the world's, and the spatial and temporal distribution is extremely uneven, so that most of my country's farmland needs to be irrigated. . It is estimated tha...

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Problems solved by technology

[0006] However, negative pressure irrigation has only stayed in the laboratory and experimental sites, and has not been actually used in the field, making the efficiency of field irrigation still low

It may be due to: the stability and reliability of the system are difficult to be guaranteed

The negative pressure irrigation system is complex, and the stable operation of the whole system requires good airtightness as a guarantee. Before the system runs, it is necessary to fill the water pipe and water supply device with water and discharge the gas inside. Some studies have used side pumping in a small greenhouse. Although the method of edge irrigation achieves the effect of water filling and exhausting, it takes a long time and the effect is not very ideal, resulting in low irrigation efficiency

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