Impulse type drip irrigation system

Abstract

The invention relates to an impulse type drip irrigation system. After passing through an impulse valve which is in front of each capillary pipe, pressurized water enters each capillary pipe in a fast-rising and slowly-reducing pressure impulse flow manner, and is sprinkled to irrigate crops in an impulse way through a micro-sprinkler head mounted on each capillary pipe. The fast-rising pressure can form a strong impact on obstructions while the slowly-reducing pressure cannot enable the water in the capillary pipe behind the impulse valve to generate resilience; and a negative pressure is formed at a water outlet of an irrigator to cause negative pressure suction blockage of the water outlet. The impulse frequency which is adjustable within a large range can be reduced at the same irrigation strength; and an impulse type micro-sprinkler irrigation system without need of a filter is formed by irrigators with larger water outlet apertures. The impulse irrigation mode is used for the micro-sprinkler irrigation to overcome defect of annularly concentrated precipitation amount of other micro-sprinkler irrigation equipment. The impulse type drip irrigation system provided by the invention has the characteristics of blockage prevention, uniform sprinkling and low cost.

Description

Technical field: [0001] The invention relates to the field of farmland irrigation, in particular to an anti-clogging pulse drip 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 made of s...

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

Obviously, the above-mentioned defects have made the pulse drip irrigation system with the capsule pulse generator and the quantitative drip irrigation pipe irrigator as the main structure compromised in the anti-clogging performance pursued by the pulse irrigation.

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