Structural Design And Experimental Research Of Ventilation Pipe Of Wind Type Insecticidal Machine For Tea Garden

Tea garden physical pest control method is a new methods in the development of tea industry in order to solve the dangers of insect pests in tea, traditional chemical pest control method in the protection of tea once played a very important role, but the side effects gradually highlight, mainly include the pesticide residues, drug resistance, environmental pollution, etc. As a result, more environmentally friendly, concise physical insecticidal method gradually be taken seriously. Physical insecticidal method by physical pest control machine implementation. In this paper, the tea garden physical pest control machine at home and abroad research present situation has carried on the thorough analysis, find its shortcomings, combining with the actual to do the improvement and optimization.This article first to form the natural growth of tea tree and trim characteristics, the tea garden pest species, life habits and distribution characteristics for understanding, analysis is commonly used in the tea garden of physical pest control machine working principle and structural features and the advantages and disadvantages of pest control effect and practicability, etc. On the basis of the tea garden physical pest control machine which designed by hunan agricultural university zeng hai-yang. Do experimental study for pest control rate, he core components of the wind pipe design are found deficiencies, so to improve and redesign according to the reality.The second, to analyze three-dimensional solid modeling of air outlet pipe in the Pro/software, meshing through the GAMBIT software, then import the FLUENT software, according to the CFD computational process carries on the numerical simulation, In order to further optimize the structure of wind pipe. And compare the uniformity of wind speed between the improved wind pipe and the original. Found that the improved nonuniformity coefficient of wind pipe wind speed is lower, the supply air is better.The last, build test platform, do experimental study for pest control rate, through single factor experiment and orthogonal experiment analysis the three factors of the wind speed, wind angle and walking speed on the effect of the pest control rate. The experimental results showed that, the wind speed exhibits the biggest influent on insecticidal rate, followed by wind angle and walking speed. When wind speed is18m/s, the wind Angle for5°, walking speed of0.7m/s, the insecticidal rate of86.0%, and had the best insecticidal effect.