室外公共交通型自动扶梯加热装置的配置与加热方式

由于我国北方地区室外环境温度在冬季时不能满足室外公共交通型自动扶梯关键部件的设计使用温度范围，因此需要给自动扶梯加装加热装置。对机房、梳齿、梯路、扶手带等关键部件的加热装置和加热控制方式进行了探讨，并给出了室外公共交通型自动扶梯的加热装置的配置建议。     

室外型自动扶梯检测应注意的问题

随着城市建设的高速发展，自动扶梯的拥有量与日俱增，而室外型自动扶梯以其独特的设计和建筑物完美的结合成为城市交通的一道靓丽风景线。目前，室外型自动扶梯设计制造参照的是室内自动扶梯的有关标准。但由于我国幅员辽阔，各个地区的气候特点不同，由此带来一系列因设计制造不完善，造成自动扶梯使用过程中故障频发、安全隐患严重等问题。因此，设计出适合地区气候特点，满足室外条件安全运行的自动扶梯对每个生产厂家显得尤其重要。     

关于自动扶梯使用寿命的探讨

目前,国内地铁、轨道交通、机场等建设对重型交通型自动扶梯的需求量日益增加,给自动扶梯生产商带来了很大的市场前景。在这些地铁等项目的招标合同中,都对自动扶梯中某些重要零部件如扶手带、梯级、珩架、梯级链等提出使用寿命的要求,见表1。     

地铁用室外自动扶梯加热方式分析

如今,地铁场合自动扶梯的使用越来越多.根据中国电梯协会团体标准 T/CEA 301-2019《地铁用自动扶梯技术规范》地铁用自动扶梯安装位置的环境温度要求不低于-10℃,运行时的环境要求温度0～40℃,但是北方地区冬季室外温度可以达到-20℃甚至-30℃以下.为了保证自动扶梯正常运行,室外自动扶梯需要加热,一般情况下,...     

浅谈寒冷地区自动扶梯加热装置的设计

通常,自动扶梯的使用环境温度在0℃以上。而在我国东北地区,冬季室外温度有时达到-25℃以下,这样寒冷的气候可能会使自动扶梯不能正常运转。为保证在0℃以下低温环境的自动扶梯能够正常运转,需要在自动扶梯内部增设专用的加热装置来提升自动扶梯部品的温度,从而达到各部品使用温度范围的要求。     

室外自动扶梯安全检验有关问题的探讨

室外自动扶梯由于工作环境在露天,日晒雨淋,温湿度条件变化幅度大,较室内自动扶梯工作环境恶劣。同时,室外自动扶梯又往往设置在交通流量很大的交通枢纽位置,运行时间长,持续重载时间长,因此工作级别高,容易出现故障,进而引发严重事故。     

浅谈公共交通型自动扶梯梯级链的保养

分析了公共交通型自动扶梯为什么比普通自动扶梯需要更高的技术要求;讨论了公共交通型自动扶梯梯级链润滑存在的问题,并给出了具体的改进方案。     

新版标准《自动扶梯梯级链、附件及链轮》的内容变化

自动扶梯梯级链条是自动扶梯重要的零部件之一，梯级链零部件的质量直接决定自动扶梯能否安全平稳地运行。机械行业标准JB／T8545《自动扶梯梯级链、附件及链轮》是梯级链条零件设计生产时应遵循的规范，也是梯级链产品的基本验收准则。笔者在本文中介绍一下新版JB／T8545标准的内容变化，旨在为理解并贯彻执行新版标准抛砖引玉。     

一起自动扶梯梯级碰撞事故的分析

介绍一起室外自动扶梯的梯级碰撞事故,总结了事故发生的概况,探讨了事故发生的原因.对损坏的梯级和联接螺栓作了简要分析,由于该联接螺栓松动后导致压轨结合面承受高度应力集中,继而发生疲劳断裂,造成了大量梯级损坏.最后对室外自动扶梯的使用和保养提出了建议.     

一种船用自动扶梯的控制系统

公共交通型自动扶梯主要应用在地铁出入口、火车站、机场、过街天桥等人流密集的场所,与普通自动扶梯相比,公共交通型自动扶梯的技术要求更高,在技术要求上与船用扶梯有诸多相似,如高低温、防水、防潮湿、防盐雾、防霉菌等。     

Simulation support for performance assessment of building components

The determination of performance metrics for novel building components requires that the tests are conducted in the outdoor environment. It is usually difficult to do this when the components are located in a full-scale building because of the difficulty in controlling the experiments. Test cells allow the components to be tested in realistic, but controlled, conditions. High-quality outdoor experiments and identification analysis methods can be used to determine key parameters that quantify performance. This is important for achieving standardised metrics that characterise the building component of interest, whether it is a passive solar component such as a ventilated window, or an active component such as a hybrid photovoltaic module.     

Case studies of outdoor testing and analysis of building components

The construction and development of the PASSYS/PASLINK outdoor test cells were funded by the European Commission, with the objective of providing high-quality test environments for quantifying the performance of passive solar building components. Over the years since the original test cells were commissioned, the initial concept for outdoor testing has been extended to include other test cell types. Significant improvements have been made to the experimental procedures and analysis techniques, and a broad range of components has been tested.     

BIM模型相连构件获取方法

目前,由于BIM模型建立不规范和IFC文件解析时出现问题,从业者在获取相连构件时有一定困难,因此,本文提出了一种以改良的OBB包围盒碰撞检测算法为基础的相连构件查找方法。该方法首先获取任意两个构件的位置信息,再利用OBB包围盒算法构建包围盒,并对该包围盒进行检测,若包围盒的尺寸比构件的大,则构造该构件的OBB层次包围盒树,然后给其中一个构件的包围盒一偏移量,最后用碰撞检测算法检测两构件是否发生碰撞,若发生碰撞,则为相连构件,若未发生碰撞,则为不相连构件。     

Simulation comparison of VAV and VRF air conditioning systems in an existing building for the cooling season

Performance of two widely used air conditioning (AC) systems, variable air volume (VAV) and variable refrigerant flow (VRF), in an existing office building environment under the same indoor and outdoor conditions for an entire cooling season is simulated by using two validated respective models and compared. It was observed that the indoor temperatures could not be maintained properly at the set temperature by the VAV no-reheat boxes. However, it could be maintained by the VAV boxes with reheat with a significant energy consumption penalty. It was found that the secondary components (indoor and ventilation units) of the VRF AC system promised 38.0-83.4% energy-saving potential depending on the system configuration, indoor and outdoor conditions, when compared to the secondary components (heaters and the supply fan) of the VAV AC system. Overall, it was found that the VRF AC system promised 27.1-57.9% energy-saving potentials depending on the system configuration, indoor and outdoor conditions, when compared to the VAV AC system.     

Chemical characterization of indoor and outdoor fine particulate matter in an occupied apartment in Rome,Italy

The daily concentration and chemical composition of PM_2.5 was determined in indoor and outdoor 24‐h samples simultaneously collected for a total of 5 weeks during a winter and a summer period in an apartment sited in Rome, Italy. The use of a specifically developed very quiet sampler (<35 dB) allowed the execution of the study while the family living in the apartment led its normal life. The indoor concentration of PM_2.5 showed a small seasonal variation, while outdoor values were much higher during the winter study. Outdoor sources were found to contribute significantly to indoor PM concentration especially during the summer, when the apartment was naturally ventilated by opening the windows. During the winter the infiltration of outdoor PM components was lower and mostly regulated by the particle dimensions. Organics displayed In/Out ratios higher than unity during both periods; their indoor production increased significantly during the weekends, where the family stayed mostly at home. PM components were grouped into macrosources (soil, sea, secondary inorganics, traffic, organics). During the summer the main contributions to outdoor PM_2.5 came from soil (30%), secondary inorganics (29%) and organics (22%). Organics dominated both indoor PM_2.5 during the summer (60%) and outdoor and indoor PM_2.5 during the winter (51% and 66%, respectively).     

聚磷酸铵对室外薄型钢结构防火涂料应用性能的影响

聚磷酸铵(APP)是防火涂料膨胀发泡体系的主要组分。通过实验分析聚磷酸铵对室外薄型钢结构防火涂料理化性能和耐火性能的影响,结果表明,高聚合度的APP的热稳定性好于低聚合度的APP;在室外薄型钢结构防火涂料的应用中,使用高聚合度的APP涂料的理化性能好于添加低聚合度APP的涂料;APP在水中尤其在碱性环境下的水解性较强,并会对薄型钢结构防火涂料的理化性能和耐火性能造成较为明显的影响。     

电梯中位置信息反馈元件的应用与研究

重点阐述了当前电梯中经常使用的位置信息反馈元件：普通型增量式旋转编码器、带UVW换相信号的增量式旋转编码器、正余弦增量式旋转编码器、绝对值式旋转编码器、旋转变压器等,介绍各种反馈元件的工作过程及工作原理。     

温湿度独立控制空调系统及其性能分析

本文给出了热湿独立控制空调系统的运行策略：采用新风去除室内的余湿、承担室内空气质量的任务,采用高温冷源去除室内的余热。分析了温湿度独立控制空调方式对室内末端装置、新风处理、制备高温冷源的要求与影响,结合我国各地区的不同气候条件特点,详细分析了上述关键部件的性能。     

绿色建筑的声环境要求

声环境要求是绿色建筑评价的重要指标。新版绿建规范在室外环境噪声、室内噪声级、建筑构件隔声、防止噪声干扰、专项声学设计等方面进行严格规定,对新版绿建规范中涉及声环境条文逐条解析,通过实例介绍建筑构件隔声计算,以及室内噪声计算。     

城市部件数据库构成、质检内容及方法探讨

作为数字化城市管理(以下简称数字城管)的基础,城市部件普查的质量,乃至作为部件普查核心成果的部件数据库质量,成为数字城管项目成败的关键环节之一.笔者结合参与的若干数字城管项目的经验,对城市部件数据库构成进行简单的介绍,就城市部件数据库质检内容和方法作简要探讨,供大家参考指证.