Pulse subsurface irrigation system

Abstract

The invention relates to an anti-clogging pulse subsurface irrigation system. After passing though pulse valves before each capillary, pressurized water enters each capillary in the manner of pulse water flow which ascends rapidly and descends slowly by pressure, thus irrigating crop through the subsurface water irrigator of each capillary. Rapidly-ascending pressure can form strong impact to clogging, slowly-descending pressure does not cause the water in the capillaries behind the pulse valves to generate 'springback' which can form negative pressure at the water outlets of the water irrigators, and therefore the negative pressure suction type clogging of the water outlets is avoided. The subsurface water irrigators with capillaries which are provided with longitudinal seams are adopted, the longitudinal-seam water outlets open and close under the action of pulse water flow, and the mechanical pull force and the impact force of the water flow jointly act on the water outlets so that the anti-clogging performance is excellent. The impulse frequency is adjustable in a large range, and under the same water irrigation intensity, the pulse frequency can be slowed down; and the subsurface water irrigators with large water outlet diameter are adopted to constitute the pulse subsurface irrigation system without filters. The anti-clogging pulse subsurface irrigation system has the characteristics of being simple in structure and low in input cost.

Description

Technical field: [0001] The invention relates to the field of farmland irrigation, in particular to an anti-clogging pulse underground irrigation system. Background technique: [0002] The pulse micro-irrigation system is a brand-new water-saving irrigation equipment successfully researched and developed by the American Intertec company in the 1980s. Its outstanding advantage is its excellent anti-clogging performance, which effectively solves the problem that the micro-irrigation system is easy to block. , eliminating the need for expensive fine filtration systems. The pulse type micro-irrigation system includes: water supply trunk, branch pipe, pulser assembly installed at the head of each symmetrical branch pipe, irrigation elastic capillary and sprinkler assembly. Among them, the pulser assembly is composed of frequency controller, pulse valve, pressure regulating valve and quick interface, and is the control center of the system. The irrigation elastic capillary is ma...

AI Technical Summary

Problems solved by technology

The main defects are: 1. The structure is complex, and the water irrigation elastic capillary needs to be made of special elastic materials, and the input cost is too high, which is not suitable for the national conditions; 2. The water spraying of the latter sprinkler is carried out sequentially after the water spraying of the previous sprinkler is released. If any sprinkler fails, the system will stop running; 3. The pulse micro-irrigation system starts the sprinkler water spraying process through the pulser assembly to release water and lose pressure. When spraying water, part of the water that has been pressurized in the pipe from the first sprinkler to the pulser assembly of each irrigation elastic capillary is directly released, resulting in both energy loss and water loss

This product has the following defects: 1. The pulse frequency cannot be adjusted, so the irrigation intensity cannot be adjusted according to the needs; 2. The pulse frequency is too high. Under the same irrigation intensity, the aperture of the outlet hole is too small, only Φ0.6mm, The clogging sensitive size with a pore size less than 0.7mm is not avoided, so a filter device is required for filtration

3. It can cause the negative pressure suction type water outlet to be blocked. For the pulse drip irrigation system with the above structure, the capsule pulse generator stops the water supply quickly, which will cause the water in the quantitative drip irrigation pipe emitter pipeline behind the capsule pulse generator to "rebound". , negative pressure is formed at the water outlet hole of the quantitative drip irrigation pipe emitter, which is easy to cause blockage of the negative pressure suction water outlet hole, especially the water outlet hole at the tail end of the quantitative drip irrigation pipe emitter

However, the blockage problem has not been fundamentally resolved, which limits the popularization and application of this technology.

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