Air injection device for subsurface drip irrigation system

An underground drip irrigation and air filter technology, which is applied in the field of farmland irrigation, can solve the problems of complex structure, many equipments, and high investment and operation costs, and achieve the effects of good gas injection effect, low operating costs, and no mechanical failure

Inactive Publication Date: 2013-03-13
FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • Air injection device for subsurface drip irrigation system

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Embodiment Construction

[0020] An air injection device for an underground drip irrigation system, as shown in the accompanying drawings, includes: an air filter 1, an air intake gate valve 2, a check valve 3, an air intake pipe 4, an air injection cavity 5, a jet nozzle 6, and a first-stage oscillation cavity 7-1. Secondary oscillation chamber 7-2, gradient flow channel 8, the air outlet end of air filter 1 is connected to the upper air inlet end of air injection chamber 5 through intake gate valve 2, check valve 3 and intake pipe 4 , the end of the jet nozzle 6 with the larger flow section is connected to the main pipe leading to the head of the underground drip irrigation system, and the end of the jet nozzle 6 with the smaller flow section is the jet port, which penetrates horizontally into the inside of the gas injection cavity 5. The horizontal outflow end is connected to the horizontal inflow end of the first-stage oscillating cavity 7-1 through a circular throat with a diameter of d1. The hori...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G25/06
CPCY02A40/22
Inventor 高胜国黄修桥冯俊杰李辉
Owner FARMLAND IRRIGATION RES INST CHINESE ACAD OF AGRI SCI
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