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目前港口集装箱装卸桥普遍采用可伸缩式双箱吊具,其电气元件主要包括中央处理器、输入输出模块、电源模块、继电器、机械式限位开关、接近式感应开关、红外感应开关、旋转编码器、指示灯具和连接线缆等。由于装卸桥通常在户外使用,因此这些电气元件的使用寿命主要受环境温度、油污、盐雾、雨雪和电磁干扰等因素的影响。 相似文献
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集装箱装卸桥在作业过程中,吊具旋锁机构动作频繁,故障概率高,本文详细讨论了旋锁机构产生故障的原因并进行分析,提出相应的防治对策。 相似文献
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通过对电控永磁吊具和普通电磁吊具的特点进行综合比较及对电控永磁吊具在工程实际中的应用分析,得出电控永磁吊具在码头装卸领域具有显著的技术优势. 相似文献
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为加快天津港智慧港口发展步伐,促进天津港数字化转型升级,解决吊具智能化建设相对滞后的问题,研发吊具电控系统智能化升级方案。通过取消吊具SCS3控制器、采用CANopen通信控制系统来升级吊具电控系统;通过更换数字编码器、增加手动操作按钮来提高设备可靠性;通过与吊具PLC通信模块的连接实现吊具远程登录监控功能。现场实际测试结果表明,改造后的吊具电控系统能够为在线故障维修和现场巡检提供便利,节约营业成本,大幅减少安全隐患,提高作业效率。 相似文献
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分别介绍了用于集装箱装卸的电动吊具与液压吊具的工作原理。将两者在能耗、维护成本、故障、性能等方面进行比较。通过分析比较得出结论:全电动集装箱吊具的性能,安全能替代液压吊具进行集装箱装卸作业,且降低使用和维修成本。 相似文献
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对RAM吊具旋锁在集装箱码头两年的使用情况进行统计、分析及合理分配作业箱量推算出RAM吊具旋锁的最初探伤箱量点、旋锁使用周期(单台RAM吊具作业箱量)。 相似文献
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1 吊具回转齿圈单根直齿崩裂现象
吊具回转齿圈通过螺栓连接固定安装在吊具挂座上部,与固定安装在大臂前端部的2套小齿轮啮合.在吊具对箱过程中,司机操作指令后液压系统便会驱动小齿轮旋转,将驱动力矩传递至齿圈,实现齿圈(包括吊具挂座、吊具等)水平回转,从而提高对箱效率. 相似文献
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价值观是指人们对价值的性质标准、构成和评价的基本看法和态度,是指导人的行为的一系列基本准则和信条。构建海事核心价值观是时代发展的要求,更是海事自身发展的需要。 相似文献
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This chapter presents a summary of the findings of the workshop on ‘Analytical and Institutional Methods and Frameworks’. The paper discusses the nature of the analytical methods used in the papers presented and the purposes for which they were employed, which were generally to either assist in the planning and operation of public transport or to monitor the efficiency and effectiveness of transport services. Subsequent sections examine issues related to data collection and management, and the more general issue of institutional arrangements. Policy and research agendas needed to support further consideration of the subject are then identified. 相似文献
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介绍青藏高原多年冻土的冻融特性,并结合我局在青藏铁路十二标段的具体施工,分析了冻土的冻融特性及具体防止措施. 相似文献
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Geoffrey Wood 《Maritime Policy and Management》2004,31(2):157-171
This paper explores the current state of coastal and inland shipping in Tanzania. It provides an overview of the state of ports and shipping in Tanzania, and the reasons underlying the present crisis of competitiveness in terms of both global pressures and national and regional dynamics. Problems of competitiveness are at least partially due to under-investment, management failures, skills shortfalls and difficulties in interfacing with the railway network. Less easy to resolve structural problems include the great imbalance between imports and exports, heightened regional competition and ongoing political instability in the Great Lakes region. 相似文献
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风量与风压的简易测量及应用 总被引:2,自引:0,他引:2
锅炉正常燃烧必须有充足的风量,当锅炉鼓风或引风不足将导致锅炉效果恶化,锅炉出力、热效应率明显下降。结合工程实例,介绍结托管简揭测试鼓、引风系统各部分风压、风量,帮助判断分析工程实际问题的简便方法。 相似文献
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Elizabeth A. Wilman 《Coastal management》2013,41(3):211-230
As the controversy over Outer Continental Shelf (OCS) oil and gas leasing continues, with environmentalists and fishermen seeking to block or delay leasing decisions that they think will adversely affect their interests, the need for better estimates of the environmental costs associated with OCS development becomes increasingly apparent. Although high degrees of precision in such estimates may never be economic, let alone feasible, better knowledge would reduce the uncertainty surrounding the magnitude of such costs, and would make it easier to come to grips with the problem and reduce, if not resolve, the controversy. 相似文献