Air injection device for subsurface drip irrigation system

Abstract

The invention discloses an air injection device for a subsurface drip irrigation system. A subsurface drip irrigation system is started, an air inlet gate valve is switched on, and water with pressure from the head of the subsurface drip irrigation system is injected out at a high speed from the injection orifice of an ejector nozzle to form negative pressure in an air injection cavity; under the action of the negative pressure, air enters the air injection cavity from an air filter, the air inlet gate valve, a check valve and an air inlet pipe; the air and high-speed flow ejected out of the ejector nozzle enter a primary oscillation cavity via a round throat path of which the diameter is d1 to carry out primary vortex oscillation stirring 'aerification'; then, the mixture enters a secondary oscillation cavity via a round throat path of which the diameter is d2 to carry out secondary vortex oscillation stirring 'aerification'; and finally, the mixture enters the subsurface drip irrigation system via a round throat path of which the diameter is d3 and a gradual-change runner. The air injection device has the advantages of good air injection effect, high aerification rate and low input and operation cost, is simple and durable, does not need additional pressurized driving devices and is especially favorable for improving the anti-blockage performance of the injection device.

Description

Technical field: [0001] The invention relates to the technical field of farmland irrigation, in particular to a gas injection device for an underground drip irrigation system. Background technique: [0002] Solving the problem of insufficient oxygen by supplementing air to the root zone of plants has always been a concern of producers and researchers. The benefits of soil aeration have long been recognized on a theoretical and experimental level, but field applications are difficult to implement due to the lack of suitable air injection equipment. [0003] The use of underground drip irrigation system to transport aerated water to the root zone of plants can effectively improve the water, fertilizer, gas and thermal environment of plant roots, and achieve the purpose of improving water and fertilizer utilization efficiency, increasing yield and improving harvest quality. How to evenly mix the air into the water in the underground drip irrigation pipeline system in the form ...

AI Technical Summary

Problems solved by technology

Although this technical solution can break the monopoly of foreign equipment, it has the obvious shortcomings of many equipment, complex structure, and high investment and operation costs.

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