Antiplugging drip irrigation irrigator design method

Abstract

This invention provides a designing method for anti-jam drop-fill douches including: 1, setting up a structure model of the runner of a douche to divide it into lattices and design the border condition of the computed regions, 2, applying CFD evaluator to compute the runner of the drop head, 3, getting the velocity of flow field and eddy distribution parameter and determining the position of low flow rate regions in the head runner and the decision factor for pressure energy dissipation, 4, finishing borders of the runner structure and changing the tooth structure to reduce brush of the tooth tine place and the back surface to the runner borders to strengthen the eddy structure of the flow field, 5, computing repeatedly and balancing flow field parameters in the front and back runners to decide the anti-jam ability of the douche and testing the flow-pressure relation of the douche to guarantee its water power performance.

Description

technical field [0001] The invention relates to the technical field of agricultural water-saving irrigation, in particular to a design method of an anti-clogging drip irrigation emitter. Background technique [0002] The emitter (drip head) is one of the key components of the drip irrigation system. Its working principle is to make the pressurized water flow through the narrow and long channels or micropores inside it to fully dissipate energy, and drip into the soil at a stable and uniform low flow rate. The performance of the emitter has a great influence on the uniformity of irrigation, water saving and system life of the entire drip irrigation system. Flow channel blockage is a frequent phenomenon in emitters, and it has always been the bottleneck that inhibits the development of drip irrigation. Studies have shown that even if various physical and chemical methods are used to treat it, the flow channel blockage of emitters still cannot be eliminated. This is directly r...

AI Technical Summary

Problems solved by technology

However, the above optimization methods have given little consideration to the maintenance of the hydraulic performance of the dripper. It is necessary to increase the length of the flow channel to make up for the lack of stable energy dissipation. This is neither economical nor in line with the current development trend of drip irrigation equipment.

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