共查询到20条相似文献，搜索用时 63 毫秒
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针对国内板栗脱蒲机对成熟度60%~70%的嫩板栗存在的机器脱蒲分离率低、适应性差,容易损伤等问题,设计了一种撕扯振动式的嫩板栗脱蒲机。该机选用撕扯振动式脱蒲方法,利用先由锯齿形辊子对嫩板栗蒲进行撕扯和固定的沟槽式辊子揉搓,再由滚筒里柔性转动辊子上尼龙棒振动和圆筒上的柔性脱蒲棒的挤压联合作用对嫩板栗进行脱蒲。测试结果表明:该机采用的脱蒲方式新颖,能够最大限度地将嫩板栗蒲与板栗籽剥离,对于减轻栗农的劳动强度、缩短栗子从采摘到上市的时间发挥了极大的作用,值得进一步推广与普及。 相似文献
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通过对板栗脱壳技术的研究,列举了不同板栗脱壳装置的工作原理,并指出了板栗脱壳设备存在的技术难题与解决的办法。 相似文献
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采摘的新鲜板栗需要及时脱蒲,然后将栗果送人冷藏室保鲜储藏,否则容易发生霉烂、生虫、发芽,从而失去其应有的经济价值。为此,针对目前市场上板栗脱蒲机存在损伤率、未脱率高等问题,设计了一款基于欠成熟的板栗脱蒲和往复运动筛分的板栗脱蒲机。文中介绍了基于Pro/E方法的柔性挤压脱蒲装置、往复筛分部件及传动机构的三维建模和三维设计,详细给出了该板栗脱蒲机的具体生产工艺过程。该板栗脱蒲机结构简单、传动效率高,通过栅栏与可调式螺栓,对不同大小的的板栗刺球脱蒲适应性好。通过对不同成熟度、含水率的板栗刺球进行试验验证和用户使用,证明该机对板栗脱蒲的损伤率、未脱率低,分离清洁度、作业效率高。 相似文献
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《农业装备与车辆工程》2003,(2)
该机采用一对相向不等速旋转的胶辊，通过胶辊的稻谷受到挤压和搓撕从而脱壳，脱壳后的混合物经过风箱使得谷糙混合物与谷壳得以分离。主要部件：料斗、机头、松紧辊机构、齿轮变速箱、谷壳分离器、机架等。该机具有产量大、效率高、自动紧辊、机械化程度高等特点，适应大型成套碾米设备砻谷的工序，每小时可加工稻谷５t，脱壳率高于国家行业标准要求。与其他碾米工艺单机组成成套碾米设备后可减少零部件的调整与换修，从而提高了成套设备的整体工作效率。售价：１２６００元。6NLT36压砣紧辊砻谷机山东省技术创新重点项目计划;;编号:2002… 相似文献
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目前,花椒主要依靠手工采摘,存在手指极易被椒树上的刺划伤、劳动强度大及生产效率低等问题。为此,设计了一种新型的梳齿式摘花椒机。该机借鉴了太极阴阳图的形状,设计出梳形的太极阴阳图状齿刀,采用梳齿和刀壳啮合的方式来剪断花椒果柄,利用自带果篼的方式有效提高了花椒的采摘效率。同时,采用嵌套的中空玻璃钢管作为支撑杆,使得刀头可以根据花椒树的高低来自由调节采摘高度,对刀头的整体运动采用了无线遥控方式,使得采摘过程方便快捷。实际采摘结果表明:该机可以有效减少对花椒树的伤害,能大大降低椒农的劳动强度、提高花椒的采摘效率,值得进一步推广普及。 相似文献
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Overland water and salt flows in a set of rice paddies 总被引：1，自引：0，他引：1
E. Playn O. Prez-Coveta A. Martínez-Cob J. Herrero P. García-Navarro B. Latorre P. Brufau J. Garcs 《Agricultural Water Management》2008,95(6):645-658
Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m−1) and an infiltration rate of 5.8 mm day−1. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day−1), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day−1 was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration. 相似文献
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车用发动机润滑油失效规律与更换周期研究 总被引：7，自引：0，他引：7
研究在正常使用条件下１０Ｗ／３０－ＱＣ级润滑油用于某型车用发动机时所表现的失效规律,确认期服从两参数Ｗｅｉｂｕｌｌ分布,并给出分布的尺度参数η和形状参数ｍ之最佳线性无偏估计（ＢＬＵＥ）同时,还为定量分析,计算车用发动机润滑油的使用可靠性和合理确定其更换周期提供了一套可供借鉴的方法,并给出了具体的计算实例。 相似文献
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赵国杰 《农业机械化与电气化》2011,(4):106-107
乡（镇）农技推广体系是农业发展的关键。介绍朝阳市农业技术推广体系的现状,针对目前体制及运行机制、服务手段等方面存在的问题,提出适合朝阳市乡（镇）农技推广体系改革与发展的对策,以期对全省农技推广体系改革和发展起到一些借鉴作用。 相似文献
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苑庆刚 《农业机械化与电气化》2010,(3):52-54
草莓果味酸甜爽口,营养价值高,为人们所喜爱的应市鲜果之一。由于草莓易受损伤和微生物侵染,因此其采收、贮藏过程极为重要。介绍草莓采收过程中的注意事项以及11种贮藏保鲜技术的实施步骤和操作方法,推介9种加工方式,为草莓产业化提供技术支持。 相似文献
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瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。 相似文献
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对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。 相似文献
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对《种子法》存在问题的探讨 总被引：1，自引：0，他引：1
李鹏 《农业机械化与电气化》2011,(6):129-130
《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。 相似文献
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在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。 相似文献
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About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered. 相似文献