Abstract
Up-film pot seedling transplanter is not stable in soil output, causing exposed and fallen seedlings, insufficient up-film daylighting and other problems. Based on the research on soil-covering process and principle of soil-covering device of transplanter, a theoretical model of the soil taking volume was established, the soil output principle of soil-covering drum was analyzed, the theoretical soil output volume was calculated, and the influences of structural parameters on soil output were studied. The field tests based on the influences of structural parameters on soil output was conducted using Box-Behnken experiment design, and a mathematical model between soil output and declination, vertical center distance (i.e. the depth in soil of soil-covering disc), and height of screw blades of soil-covering disc was established. Optimized analysis on the response surface was conducted based on parameter range and target soil output range. Results show that the soil output increases when the declination of the soil-covering disc increases from 20° to 40°, or the vertical center distance increases from 4-6 cm; the change of screw blade height has small impact on the soil output; The optimal structural parameters combination for the soil-covering device was obtained with the included angle of soil-covering disc of 37°, vertical center distance of 5.5 cm, and height of screw blades of 5cm. With this optimal parameters combination, the soil output of 1 m soil-cover belt is 4.84 kg, which is basically the same with the actual volume of 4.53 kg and can ensure the stability of the soil output and provide reference for the optimization design of soil-covering device. Keywords: up-film transplanting soil-covering, soil-covering device, soil output, model, optimization DOI: 10.25165/j.ijabe.20211403.5383 Citation: Xu H Z, Tian D Y, Liu J D, Niu Z H, Li Q. Operation analysis and parameter optimization of drum type soil-covering device. Int J Agric & Biol Eng, 2021; 14(3): 123–129.
Highlights
Northwestern area in China is dry and has less rainfall with low earth temperature in the early spring
With this optimal parameters combination, the soil output of volume required for pot seedling transplanting was achieved, which provide references for the optimized design of soil-covering device on automatic transplanter
To verify the reliability of the selected structural parameters of the soil-covering device and to facilitate the regulation of soil-covering regulating device, the optimized parameters were slightly adjusted in the verification test: the included angle of soil-covering disc, 37°; the vertical center distance, 5.5 cm; the height of screw blades, 5 cm
Summary
Northwestern area in China is dry and has less rainfall with low earth temperature in the early spring. Planter or transplanter accomplishes the drip belt paving, ground film paving, and soil covering at one time, which is of extremely high efficiency. Sun et al.[12] discussed a scrape lifting belt type soil-covering device and conducted a specific theoretical analysis and calculation on the whole soil-covering process and principle. This paper is designed to make a further study on the soil output of drum type soil-covering device on automatic transplanter. Optimized analysis on the response surface was conducted based on parameter range and target soil output range With this optimal parameters combination, the soil output of volume required for pot seedling transplanting was achieved, which provide references for the optimized design of soil-covering device on automatic transplanter
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