Method and device for measuring hydraulic characteristic of trickle irrigation emitter

A measuring device and technology for hydraulic characteristics, which is applied in the field of measuring devices for hydraulic characteristics of drip irrigation emitters, can solve the problems of long time-consuming measurement of hydraulic characteristics of emitters, cumbersome testing process, complex structure, etc., achieve simple structure, improve measurement efficiency, and simplify measurement The effect of the process

Inactive Publication Date: 2014-07-09
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention mainly solves the common problems of complex structure, high cost, cumbersome test process, and long time-consuming and low efficiency of measuring hydraulic characteristics of emitters in the existing test platform or test system of hydraulic characteristics of emitters.

Method used

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  • Method and device for measuring hydraulic characteristic of trickle irrigation emitter
  • Method and device for measuring hydraulic characteristic of trickle irrigation emitter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1, see figure 1 , select the air chamber 1 made of hard plastic or metal to provide gas storage space, connect the gas outlet nozzle 4 at the lower end of the air chamber 1 with the water dispenser 9 to be tested through the connecting hose 7; then connect the air inlet at the upper end of the air chamber 1 The air nozzle 5 is equipped with a rubber plug 8, and a branch of the three-way 6 is connected to the air chamber 1 through the rubber plug 8, and then the other two branches of the three-way 6 are respectively connected to the air supply source 2 and the air supply source 2 through the connecting hose 7. The air pressure gauge 3 is connected, the gas supply source 2 is used to provide air flow to the air chamber 1, and the air pressure gauge 3 is used to measure the gas pressure in the air chamber 1; thereby forming the drip irrigation emitter hydraulic characteristic measuring device of the present invention.

Embodiment 2

[0031] Embodiment 2, adopt the device of above-mentioned embodiment, carry out drip irrigation emitter hydraulic characteristic measurement, its measuring method is as follows: the emitter hydraulic characteristic measuring device according to figure 1 The method shown is connected to the emitter to be tested, and the air supply source is used to supply air to the air chamber. When the pressure in the air chamber measured by the barometer reaches the predetermined value P (0), the air supply is stopped. The predetermined value P (0) is 20-100cmH 2 The pressure of O, that is, 1.96kPa-9.81kPa; stop the air supply and start timing at the same time, and observe the change of the air chamber pressure measured by the barometer, and record the change process of the air chamber pressure P(t) according to the principle of first sparse and then dense. The cumulative time t of the air chamber, when the pressure in the air chamber is close to the atmospheric pressure, the observation is s...

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Abstract

The invention discloses a method and device for measuring a hydraulic characteristic of a trickle irrigation emitter. The device is characterized by comprising an air chamber (1), an air supply source (2) and an air pressure measurement meter (3) which are communicated and connected. Air guide characteristic parameters S of trickle irrigation emitters with different models and flows are measured by using the device provided by the invention, and a quantitative relation between flows of the trickle irrigation emitter under different working pressures and the air guide characteristic parameters S is established, flow values of the trickle irrigation emitter under different pressures can be figured out by measuring the air guide characteristic parameters S of the trickle irrigation emitter on the basis of the quantitative relation, and thus, the flow coefficient and the flow state index of the trickle irrigation emitter can be obtained, the hydraulic characteristic of the trickle irrigation emitter is obtained, the measurement process of the hydraulic characteristic of the trickle irrigation emitter is greatly simplified, and the measurement time and the measurement cost are saved. The device can be realized technically, is greatly reduced in cost and is easy to popularize and apply.

Description

Technical field: [0001] The invention relates to the technical field of micro-irrigation, in particular to a measuring device and a measuring method for hydraulic characteristics of a drip irrigation emitter. Background technique: [0002] Drip irrigation is one of the most advanced irrigation technologies at present, which minimizes the leakage and loss of water through pipeline water delivery and local micro-irrigation. At the same time, because it can supply the water needed by the crop root zone in a timely manner, the water use efficiency is greatly improved. Drip irrigation can be easily combined with fertilization, that is, the chemical fertilizer is dissolved and poured into the irrigation system. Since the chemical fertilizer is combined with the irrigation water, the fertilizer nutrient is directly and evenly applied to the root layer of the crop, which truly realizes the synchronization of water and fertilizer, and greatly improves the effective use of fertilizer....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00
Inventor 张振华史文娟牛文全郭庆杨润亚潘英华
Owner LUDONG UNIVERSITY
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