Constant-current and variable-frequency sprinkling irrigation system

A frequency converter and control system technology, applied in the field of agricultural irrigation, can solve the problems of low pressure, affecting the quality of sprinkler irrigation, and different hydraulic losses of pipelines, and achieve the effect of improving the quality of irrigation.

Inactive Publication Date: 2017-10-24
HOHAI UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage of this system is: due to the different distances between the sprinkler irrigation branch pipes and the water pump, the hydraulic loss of the pipeline is different, resulting in low pressure at the inlet of the branch pipe far away from the water pump during operation, and high pressure at the inlet of the branch pipe near the water pump.
Therefore, the outlet pressure of the water pump is constant and the pressure of each branch pipe is different. Therefore, when different branch pipes are running, the working pressure of the nozzles on them is different, which affects the irrigation quality of sprinkler irrigation.

Method used

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  • Constant-current and variable-frequency sprinkling irrigation system
  • Constant-current and variable-frequency sprinkling irrigation system
  • Constant-current and variable-frequency sprinkling irrigation system

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Embodiment Construction

[0022] The sprinkling irrigation frequency conversion control system of this embodiment is as follows: figure 1 As shown, computer 1 for terminal control, PLC programmable controller 2, frequency converter 3, motor 4, water pump 5, encoder 41 arranged on motor 4, flow meter 6 arranged in front of the sprinkler irrigation system, and alarm 7 and other components, when the running sprinkler irrigation system is blocked (that is, the flow rate is less than the set lower limit), the computer program can immediately identify the alarm and stop running the water pump to prevent explosion.

[0023] The PLC programmable controller 2 is electrically connected bidirectionally with the communication port of the computer 1 through its communication port; the control terminal of the frequency converter 3 is electrically connected with the corresponding output port of the PLC programmable controller 2; The power supply end is electrically connected; the output end of the flowmeter 6 and th...

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Abstract

The invention discloses a constant-current and variable-frequency sprinkling irrigation system. The system comprises a control system and a sprinkling irrigation system; the control system comprises a computer, a PLC and a frequency converter; the sprinkling irrigation system comprises a motor, an encoder, a water pump, a flow meter, a pipeline and a nozzle; and the PLC realizes constant water outlet flow of the water pump and automatic pressure adjustment of far and near wheel irrigation set branch pipes through changing the power supply frequency of the frequency converter and adjusting the rotating speed of the motor. Under the condition of keeping the number of sprinkling irrigation nozzles working at the same time invariable, the rotating speed of the water pump is adjusted to guarantee constant water outlet flow of the water pump, so that the spraying flow is constant no matter how long the distance from the water pump is, the automatic pressure adjustment of the wheel sprinkling set branch pipes and the nozzles is realized, and the water irrigation quality of sprinkling irrigation is improved.

Description

technical field [0001] The invention relates to a constant-flow variable-frequency sprinkler irrigation system, which belongs to the technical field of agricultural irrigation. Background technique [0002] With the increasing shortage of water resources in our country, sprinkler irrigation technology with the advantages of water saving and convenient operation has become more and more widely used. At present, the constant-pressure variable-frequency sprinkler irrigation system mostly used in our country is to connect the PLC programming controller with the pressure sensor, and keep the water pump outlet pressure constant through the PLC programming control. The disadvantage of this system is that: due to the different distances between the sprinkler irrigation branch pipes and the water pump, the hydraulic loss of the pipeline is different, resulting in low pressure at the branch pipe inlet far away from the water pump during operation, and high pressure at the branch pipe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/00A01G25/16
CPCA01G25/16F04D15/0066Y02A40/22
Inventor 缴锡云郭维华卢健潘小保巫纾予
Owner HOHAI UNIV
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