Design and Experiment of Pneumatic Precision Hill-drop Drilling Seed Metering Device for Hybrid Rice

Zhai Jianbo, Xia Junfang, Zhou Yong

Abstract

Paddy rice is one of the most important fine food crops that feed the largest proportion of the world’s population. There are two planting patterns of paddy rice called direct seeding and transplanting. In order to realize precision hill direct seeding of hybrid rice in field and solve the problem of budded seed overhead and jaming in seeding box, a pneumatic seed metering device for hybrid rice budded seed was designed based on the seeding principle of air suction-air blowing. The seed metering device used cam, pushing rod and combing strips to solve the problem of rice budded seeds’ mobility. The seeding plate which had groups of suction holes could absorb 2~4 rice budded seeds. The seed metering device was constituted by seed box, cam, push rod, seeding axis, seeding plate, air chamber, flange and so on, by which two to four bud seeds could be sucked and dropped at the same time. The adsorption mechanism of budded seed in seed filling area was analyzed in the paper theoretically. An equation of vacuum degree in suction chamber was built. The paper launched bench experiment of double sided pneumatic seed metering device and studied the relationship between seeding performance and combing device，rotational speed of seeding plate. The orthogonal experiment was done which took the diameter of suction hole, rotational speed of seeding plate and vacuum degree of air chamber as factors. The experiment result showed that the combing strips could stir rice budded seeds. The orthogonal experiment indicated that the optimal condition for the seed metering device is as follows: when the rotational speed is 15r/min, the vacuum degree is 3.5kPa and the diameter of suction hole is 1.6mm. And the experiment in field indicated that the device meets the agronomic requirement of planting rice budded seed.


Keywords: hybrid rice, budded seed, pneumatic seed metering device, precision hill-drop drilling


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References


Qing Xianguo, Huang Dajin, Ai Zhiyong. Developmental strategies for hybrid rice industrial economy in China [ J]. Journal of Hunan Agricultural University: Natural Sciences, 2008, 34(6) : 618 -623. (in Chinese)

Zhang Guozhong, Luo Xiwen, Zang Ying, et al. Experiment of sucking precision of sucking plate with group holes on rice pneumatic metering device [J]. Transactions of the CSAE, 2013, 29(6) : 13 -20. (in Chinese)

Wang Zhaohui, Ma Xu, Jia Ruichang. Effects of working parameters on seed suction performance of seeder device for super hybrid rice seeds [J]. Transactions of the CSAE, 2009, 25(8) -.88 -92. (in Chinese)

Luo Xiwen, Jiang Enchen, Wang Zaiman, et al. Precision rice hill-drop drilling machine [J]. Transactions of the CSAE, 2008, 24( 12) :52 -56. (in Chinese)

Xia Junfang, Xu Qichuan, Wang Zhishan, et al. Design of rice bud seed sowing and fertilizer machine [ J]. Transactions of the Chinese Society for Agricultural Machinery, 2010,41 ( 10) :44 -47. (in Chinese)

Luo Xiwen, Xie Fangping, Ou Yinggang, et al. Experimental investigation of different transplanting methods in paddy production [J]. Transactions of the CSAE, 2004, 20(1) :136 — 139. (in Chinese)

Luo Xiwen, Wang Zaiman, Jiang Enchen, et al. Design of disassemble rubber guard device for cell wheel feed [ J]. Transactions of the Chinese Society for Agricultural Machinery, 2008, 39( 12) :60 -63. ( in Chinese)

Zuo Yanjun, Ma Xu, Yu Dalue, et al. Flow field numerical simulation of suction cylinder-seeder for rice bud seed with socket slot [ J]. Transactions of the Chinese Society for Agricultural Machinery ,201 1 ,42(2) :58 -62. (in Chinese)

Chen Xuegeng, Lu Yongtao. Sowing-performance of air-suction cylindrical cotton precision dibblerr [J]. Transactions of the Chinese Society for Agricultural Machinery, 2010, 41(8) ; 35 -38. (in Chinese)

Zhao Zhan, Li Yaoming, Chen Jin,et al. Dynamic analysis onseeds pick-up process for vacuum-cylinder seeder [J]. Transactions of the CSAE , 2011 , 27(7 ) : 112 - 116. (in Chinese)

Zhang Xiaohui, Song Jiannong. Design and research on rice precision needle-like vacuum seeder [ J J . Transactions of the Chinese Society for Agricultural Machinery, 2009,40(3) : 69 —71. (in Chinese)

Han Bao, Wu Wenfu, Wang Hongye. Suction drum-type seed metering device with auto-cleaning block of transplanter for tray grown rice seedling [ J]. Transactions of the CSAE, 2009,25(9) :96 -99. (in Chinese)

Li Yaoming, Zhao Zhan, Chen Jin. Numerical simulation and experiment on the seeds pickup performance of precision air-suction seeder [J]. Transactions of the Chinese Society for Agricultural Machinery, 2008, 39( 10) ; 95 -99. (in Chinese)

Wang Shucai, Xu Qichuan. Airstream upon seeds in a pneumatic feed [J]. Transactions of the Chinese Society for Agricultural Machinery, 1998, 29(Supp. ) :55 -57* (in Chinese)

Tao Guixiang, Yi Shujuan,Li Zuotong, et al. Temperature field analysis of water immersion temperature rice seed soaking germination equipment [J]. Transactions of the Chinese Society for Agricultural Machinery, 2011, 42 ( 10): 90 - 94. (in Chinese)

Yuan Yueming, Wu ming, Yu Enzhong, et al. A study on material characteristics of rice budded seeds [ J ] . Journal of Jilin Agricultural University ,2003 , 25(6) :682 -684. (in Chinese)


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