Automatic irrigation-drainage system for farmland

An automatic, irrigation and drainage technology, applied in agriculture, soil drainage, horticulture, etc., can solve problems such as short service life, difficult detection, difficult to accept by farmers, etc.

CN102144524AInactive Publication Date: 2011-08-10FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-08-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an automatic irrigation-drainage system for farmland. Irrigation water enters a water level control pond through a water level control valve; a floating ball drives the water level control valve to regulate the water supply amount until the supplied water is equal to the consumed water; the water level is stabilized at a certain water level when the water supply of the water level control valve is stopped at a water supply water level h1; the irrigation water enters a soil filling region at the upper part in a U-shaped concrete groove through a nonfine concrete cover plate and a sand inverted filter from the bottom of the inner part of the U-shaped concrete groove so as to form a soil saturated water layer lower than h1; the water in the saturated water layer is raised to the root layer of the crop in the form of capillary water; the water supply amount is increased or reduced along with water consumption amount so that the farmland is automatically irrigated; because the h1 is lower than the height h2 of the upper edge of the U-shaped concrete groove, no gravity water is leaked; once the soil saturated water layer is higher than the h1 because of raining, the water level control valve is turned off, the irrigation is stopped; if the water layer is higher than the upper edge h2 of the water level control pond, the water overflows to a water accumulation pond, and the water begins to be discharged; and the irrigation is recovered until the soil saturated water layer is lower than h1. The system has full automatic irrigation, high reliability and excellent durability.
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Description

Technical field:

[0001] The invention relates to a farmland irrigation and drainage technology, in particular to an automatic farmland irrigation and drainage system. Background technique:

[0002] The existing automatic irrigation system needs to calculate and predict the appropriate irrigation time and irrigation amount by detecting plant physiological parameters, soil moisture parameters and many meteorological parameters. , the equipment is expensive, it is difficult for farmers to accept it, and it is also very difficult to popularize it. In addition, the existing automatic irrigation system only focuses on the decision-making of the appropriate irrigation time and water volume, while ignoring the important field irrigation link, that is, it cannot solve the ineffective evaporation of ground irrigation, nor can it solve the deep problem of underground irrigation (seepage irrigation). Leakage, ineffective irrigation and nutrient loss due to irrigation methods, irrigatio...

Examples

Embodiment Construction

[0019] A farmland automatic irrigation and drainage system, such as figure 1 , figure 2 As shown, it includes: a water storage tank 1, a water level control pool 2, a water storage tank 3, a main water delivery pipe 4, a confluence pipe 5, and a number of sprinklers 6. The water storage tank 1 is located between the water level control pool 2 and the water storage tank 3 Above, the maximum water level allowed for the pond 3 is lower than the upper edge of the wall of the water level control pool 2. Several emitters 6 communicate with the water level control pool 2 through the confluence pipe 5 and the main water delivery pipe 4. Several emitters 6 The longitudinal direction is parallel to each other and the appropriate spacing is left to be vertically connected to the confluence pipe 5, and they are jointly located on the same horizontal plane under the crop root system layer. Under the premise of ensuring the effective water supply of the crop root system layer, the depth of...