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Negative pressure water head irrigation system

An irrigation system and negative head technology, which is applied in the field of negative head irrigation system devices, can solve problems such as the failure of the negative head irrigation system to operate normally, the way of water intake cannot meet the requirements, and the slow flow rate of the water body, so as to improve crop productivity, suppress ineffective evaporation, Precise and constant control of the effect

Inactive Publication Date: 2009-04-08
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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Problems solved by technology

In order to ensure the successful operation of the negative head irrigation system, it is necessary to provide continuous irrigation water with a certain negative pressure to the irrigation system, and the common water intake methods cannot meet the requirements
When carrying out negative water head irrigation, it is mainly relying on the soil to absorb water from the water supply. The water flow in the irrigation system is very slow, and gas is generated due to the biochemical action of water. The water and gas cannot be separated well with the commonly used water supply. , the gas in the water body cannot be separated from the water body and discharged normally, thus causing the negative head irrigation system to fail to operate normally

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The negative head irrigation system device is a sealed system. Firstly, the water supply plate 14 is buried in the soil vertically or at an inclination angle θ (60°-90°), with the permeable membrane of the water supply plate facing up, and then according to figure 1 Negative head irrigation device structure diagram Install a negative head irrigation system. After installation, close the sealing valve 8 on the connecting pipe 7 and the water guide pipe 11, open the irrigation water tap 1 and the pipe 17 connected to the water supply device, and replenish water to the water container 3 and the sealing cylinder 9 respectively. From the transparent plexiglass pipe 10 Observe the water level in the sealing cylinder 9, when the sealing cylinder 9 is full of water, close the sealing valve on the pipe 17, open the sealing valve 8 on the aqueduct 11 and give the main pipe 12, the pipeline 13 and the water supply plate 14 to be full of water. Since the sealing cylinder 9 flushes...

Embodiment 2

[0024] The difference between this negative head irrigation system and the first embodiment is that the water supply plate adopts a microporous ceramic plate or a microporous organic plate 26 instead of a permeable membrane material, such as Figure 4 and Figure 5 shown. The specific implementation of the system is the same as that of the system in Embodiment 1.

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Abstract

The negative water head irrigation system features the so defined water head irrigation technology, which controls the irrigation pressure in negative water head so as to control the soil water content precisely and continuously. The system includes three parts: a negative water head water providing set, an air collecting chamber and a water providing plate. The negative water head water providing set converts water from the water supply tap at normal pressure into irrigation water in certain negative pressure, the air collecting chamber collects escaped air from the irrigation water during irrigation, and the water providing plate provides water to soil and can form air phase and liquid water favorable to moving of air phase to the air collecting chamber.

Description

technical field [0001] The invention relates to a negative water head irrigation system device, which sets the water supply pressure to a negative value to realize continuous and precise control of soil water content in the irrigation process, so that the water and gas conditions of the soil are constant to promote the economic yield and quality of crops At the same time, by limiting the volume of soil moisture, it can inhibit soil surface evaporation and underground leakage, save irrigation water resources, improve fertilizer utilization efficiency, and reduce the technical requirements for farmers in the use of irrigation equipment. Background technique [0002] At present, all water-saving irrigation technologies adopted or promoted in agricultural production, such as sprinkler irrigation, micro-irrigation, drip irrigation, subsurface drip irrigation, alternate root zone irrigation, etc., are based on irrigation with positive water supply pressure, and part of the soil wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G25/00A01G25/16
Inventor 薛绪掌赵春江邹朝望王卫光耿伟陈立平
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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