Adjustable variable-speed rotating nozzle and control method

Abstract

The invention relates to an adjustable variable-speed rotating sprayer and a control method.The sprayer comprises a sprayer body, a hollow shaft, a speed reduction transmission mechanism, a direct-current speed reduction motor and a motor adjusting and controlling system, and the direct-current speed reduction motor is used for driving the sprayer body to rotate relative to the hollow shaft through gear engagement of the speed reduction transmission mechanism; the motor regulation and control system comprises a Hall encoder, a control mainboard and a power supply which are electrically connected; the method comprises the steps that the logic processor of the control mainboard controls output of the power driving module through PWM according to set data and direct-current gear motor state signals fed back by the Hall encoder, the direct-current gear motor is driven to act, flexible variable-speed rotation is achieved, the rotation speed, the rotation angle and the rotation position of the nozzle are adjustable, operation is stable, and efficiency is high; the device is simple and intelligent to operate, saves energy and electricity, can regulate and control the nozzle to perform variable-speed rotation and fan-shaped back-and-forth rotation in different intervals within 360 degrees, improves the experiment efficiency of researching the influence of jet flow of the nozzle on the spraying effect, and is used for laboratory and field spray irrigation.

Description

technical field [0001] The invention belongs to the technical field of sprinkler irrigation, and in particular relates to a controllable variable-speed rotary sprinkler and a control method. Background technique [0002] With the development of agriculture and the need for water saving, sprinkler irrigation technology, which is one of the measures to increase production and save water in agricultural production, is getting more and more attention. In farmland sprinkler irrigation, in order to obtain a larger sprinkler irrigation area and reduce the impact intensity of irrigation water droplets on crops, fixed sprinkler sprinklers often have the function of autonomous rotation, such as rocker type sprinklers, which can be pushed by the rocker arm repeatedly hitting the jet water column. The nozzle forms a stable intermittent rotation. The sprinkler in the prior art has the following problems in some practical applications or basic research in the laboratory: (1) When studyin...

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Problems solved by technology

The nozzles in the prior art have the following problems in some practical applications or basic research in the laboratory: (1) When studying the influence of the jet flow of the nozzle on the spraying effect, based on the principle of controlling variables, it is necessary to exclude the impact of the impact structure, resulting in The water tongue cannot hit the rocker arm to generate power to rotate, and the rocker nozzle will lack the source of rotation power, which will lead to difficulties in the hydraulic performance test and research, and an additional rotating device needs to be provided on the nozzle; (2) Study different speeds based on the principle of control variables For the impact on the hydraulic performance of the nozzle, the rocker nozzle rotates the nozzle through the reaction force generated by the rocker hitting the water tongue, and there is a loss of the material of the rocker nozzle, and due to the lack of a speed regulation structure, it is impossible to achieve speed regulation on the same nozzle , resulting in low test efficiency and doubtful test accuracy; (3) The existing rotary drive and control components are complex, difficult to operate and control, and consume a lot of energy. Sprinkler rotation speed, rotation angle, and rotation position requirements for various site irrigation

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