A system for realizing positive and negative pressure irrigation

Abstract

The invention discloses a system for achieving positive pressure and negative pressure irrigation. The system comprises a switch control subsystem and an irrigation subsystem, the switch system subsystem comprises a first liquid containing device, a second liquid containing device, a first connecting pipe, a second connecting pipe, a third connecting pipe, a first suspension rope, a second suspension rope and a first lever; the irrigation subsystem comprises a fourth connecting pipe, a connecting rod, a second lever, a plug, a first water storage bucket, a second water storage bucket, a wateroutlet pipe and an irrigation device; the top of the first liquid containing device is lower than the bottom the second liquid containing device; the first end of the first lever is winded by the first suspension rope suspending the first liquid containing device; the second end of the first lever is winded by the second suspension rope, and the second suspension rope suspends the second liquid containing device; the second end of the first lever is hinged to the first end of the second lever; the second end of the second lever is fixedly to the connecting rod; the top of the second liquid containing device is communicated with the top of a second water storage device through the fourth connecting pipe. By applying the system, the distribution rate of negative pressure irrigation water inthe soil water space can be increased.

Description

technical field [0001] The invention relates to low energy consumption agricultural irrigation technology, in particular to a system for realizing positive pressure and negative pressure irrigation. Background technique [0002] Water is needed by any organism. The water transpired by crops during the growth and development process is often hundreds or even tens of thousands of times their own biomass, and the soil is often difficult to provide so much water. Therefore, in the modern production process, through Irrigation is an essential agricultural activity to add moisture to the soil and then meet the water demand of crops. Generally, the basic means of replenishing moisture to the soil is to irrigate according to a certain time interval, but this irrigation method is a pulse type. Irrigation method, during the irrigation process, the soil moisture content presents a pulse-like change, the soil moisture content suddenly jumps to a saturated state, and after the irrigation...

AI Technical Summary

Problems solved by technology

[0003] In the past 10 years, in view of the technical problems of the above traditional irrigation technology, a new type of efficient active negative pressure irrigation technology for crops has been proposed, which basically overcomes the above technical problems, but the active negative pressure irrigation technology faces new challenges. technical challenge

For example, irrigation water is absorbed into the soil by the soil matric potential under negative pressure, and has always been in an unsaturated flow state, resulting in a very slow spatial distribution of soil moisture and the inability to quickly form an effective wetting body.

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