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为适应天津港北煤南移工程、提升北疆作业环境质量,我公司从2006年起逐步进入了货类调整期,由钢材、集装袋等件杂货取代了煤、铁矿石等散货,而作业过程中所涉及的工属具也发生了很大的变化。散货作业主要使用抓斗,而件杂货(钢板、钢管、螺纹钢、工字钢、C型钢及集装袋)则使用装 相似文献
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大连北良港散粮移动输送设备主要有4种:1种是最早使用的10台皮带机,主要用于割口作业、堆高作业以及配合灌包机灌包作业,工艺较陈旧;另外3种为最近使用的,工艺较新颖,性能较先进. 相似文献
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0 引言 随着天津港集装箱码头有限公司业务的发展,装箱量日益增多.在众多的装箱货物中,集装袋货物卸车装箱的时间过长,不利于公司生产效率的提高,同时存在着一定的安全隐患,有必要对原有的集装袋卸车装箱工艺加以改进. 相似文献
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船舶板和构件的大面积割换 总被引:2,自引:2,他引:0
文章通过对船舶受力、船舶强度、船舶变形和裂纹的产生及扩展的分析,来说明船舶在大面积割换板材和构架时,为什么必须采取分期分批交叉割换的工艺.并简要的叙述了装焊工艺、工艺流程、质量检验以及变形的观察、测量和监控.以较短的修船周期和安全优质的服务理念完成船舶修理,服务船东. 相似文献
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金属管道金工制作时割口线的放样,采用平面展开图的方法,可以大大地提高工艺准确度;割口不需要修补就能很好的啮合,大大地提高生产率,质量易保证节俭材料降低成本。 相似文献
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随着天津港集装箱码头有限公司业务的发展,装箱量日益增多。在众多的装箱货物中,集装袋货物卸车装箱的时间过长,不利于公司生产效率的提高,同时存在着一定的安全隐患,有必要对原有的集装袋卸车装箱工艺加以改进。 相似文献
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钢管桩按照贯入度进行收锤时,往往顶部标高与设计标高不一致需要进行割桩。传统的钢管桩海上割桩受潮位影响较大,一天可作业的时间有限,一个作业组一天能割桩10~15根,且需要专门的吊机配合使用,机械使用效率较低,且对于大风浪区域,其日均可以作业时间相对较少。东非某码头项目通过设计一种能适应全潮位的浮排,浮排采用葫芦拉离水面,消除了风浪将钢管桩人工割桩至数公分的连接,再采用吊机进行整片收割,一天能割桩40~50根,大大提高了割桩的效率,节省了机械台班,为其它使用钢管桩的码头工程提供参考。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献