Portable siphon farmland irrigation flow measuring device and measuring method implemented by same

Abstract

The invention discloses a portable siphon farmland irrigation flow measuring device and a measuring method implemented by the same. The flow measuring device comprises a double-layer water filter screen, a plastic flexible tube, a flow meter with a propeller and a water outlet rigid tube. The plastic flexible tube is arranged on a dyke of a farmland irrigation channel in a crossing manner, one end of the plastic flexible tube extends into a space below a water surface of the water channel, the other end of the plastic flexible tube is connected with the plastic rigid tube, and the tail end of the plastic rigid tube is communicated with a farmland; the double-layer water filter screen is arranged at the end, which extends into the water channel, of the plastic flexible tube, and a vacuum suction barrel and the flow meter with the propeller are arranged on the portion, which extends out of the water channel, of the plastic flexible tube. The measuring method includes starting the vacuum suction barrel; generating vacuum in the plastic flexible tube to form a siphon tube; generating pressure difference between internal pressure of the siphon tube and atmospheric pressure which acts on the water surface of the water channel; enabling water flow in the water channel to flow through the highest position of the siphon tube under the effect of the pressure difference and guiding the water flow to the farmland via the plastic rigid tube; enabling the water flow to flow through the flow meter with the propeller on the plastic flexible tube so as to measure the farmland irrigation flow. The portable siphon farmland irrigation flow measuring device and the measuring method have the advantages that water can be stably distributed and can be measured, the portable siphon farmland irrigation flow measuring device is simple in operation and easy to maintain, and the water can be accurately distributed.

Description

technical field [0001] The invention relates to a portable siphon type farmland irrigation flow measurement method, which belongs to a special method for farmland irrigation water distribution or field irrigation test water metering. Background technique [0002] The flow measurement of farmland irrigation system is an important facility for farmland irrigation and water distribution. The accuracy of flow measurement directly affects the scientific water management and water fee collection in irrigation areas, and even affects the popularization and application of advanced irrigation technology. With the continuous improvement of scientific management requirements for farmland irrigation water and the continuous popularization of precise water management technology, the farmland irrigation flow measurement method and equipment technology will become more and more valuable for research, promotion and application, and gradually attract people's attention. [0003] At present, ...

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Problems solved by technology

[0003] At present, the siphon pipe project has been widely used in water conservancy projects in China. The diameter of the siphon pipe used as a cross building in the irrigation area even reaches 3m, but it is relatively rare in the metering of farmland irrigation water.

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