乡镇水表检定遇到的问题与解决办法探析

水表检定在整个计量事业中处于相当重要的地位,直接关系到千家万户的经济利益,所以针对水表检定遇到的问题,提出解决办法就显得很有现实意义。文章就乡镇水表检定遇到的问题及相应的解决办法进行了探讨与分析。     

大型平直类量具在线自动化检定装置

介绍了一种以光电自准直仪和自行设计的机械驱动小车及数据自动采集系统组成的大型平直类量具在线自动化检定装置。这套装置可以实现该类平面度测量数据采集过程自动化。通过实验比对验证了该装置的可靠性,并且评定了测量结果的不确定度。该检定装置完全满足最新的《平板》检定规程对计量标准器具的要求。     

三相电能表检定装置测量结果不确定度的评定

一切测量结果都不可避免的具有不确定度,本文依据JJF1033-2001《计量标准考核规范》,介绍了东兴铝业有限公司三相电能表检定装置在测量过程中各种因素对测量结果产生的影响,进一步考虑测量结果的可靠性,进行不确定度的分析和评定。     

堆垛多功能起重机夹持力测量装置的检定及应用

根据压力传感器与称重显示仪表的工作原理,通过螺栓,铁板,将其结合起来,组成一个整体夹持力测量装置。这种测量装置缺少合适检定方法。本文在研究压力传感器及称重显示仪表的工作原理的基础上,提出对该装置新的检定方法及实际工作中应用。     

降低950冷轧机辊耗的工艺措施

对造成950冷轧机辊耗升高的各种原因进行分析,通过采取完善探伤标准、规范磨削规定,对开卷机、卷取机的中心线进行测量和调整,优化轧制过钢量,对AGC控制系统进行升级改造,在乳化液箱安装机械搅拌装置等措施,轧机轧辊消耗降低到0.873 kg/t。     

煤气流量检测装置的改进

煤气流量检测装置是炼钢厂300t转炉OG系统烟气测量的主要检测手段。由于原煤气流量检测装置的取压管内存在积水问题,且设计安装也存有缺陷,从而使流量检测误差增大。为此对检测装置进行了改造,取得了较好的效果。     

在线水表的计量分析与探讨

在线水表的计量是否正确,对供水企业的售水量至关重要,其水表准确与否直接关系到企业经济效益,同时也影响到企业的漏失率。要从水表检定的合格率高低看在线水表的精准度。     

多层自动存储装置安装测量新方法—零i角法

在西南铝多层自动存储装置安装测量中，笔者摸索出了一种进行特种精密水准测量的新方法-“零i角法”。该方法的应用解决了安装测量中遇到的技术难题，满足了安装测量的技术要求，是值得推广应用的一种方法。     

影响窄带钢拉剪边丝余量的因素及对策

通过对影响带钢拉剪边丝余量的因素进行分析，提出了改造方案，重新设计、制造、安装了对中装置和边丝打断装置，满足了生产需要，提高了成材率和作业率，降低了电耗和不安全因素。     

烧结混合机打水装置改造

八钢265 m2烧结混合机打水装置由于设备故障频发，对装置进行改造，将方形梁通过钢丝绳架设打水管的结构改为在筒体外安装打水装置，并通过控制喷头数量和角度将水均匀地打入混合机筒体，避免了钢丝绳和打水管易折断事故，且方便了检修。     

弯管流量计在热电厂蒸汽计量中的应用

介绍了弯管流量计的工作原理、基本组成、性能特点,及其在蒸汽供热计量中的应用。使用证明,弯管流量计作为一种新型流量计量仪表可以替代孔板在蒸汽、水、空气等介质的测量,节能效果显著。     

板带轧机轧辊表面温度检测系统研究

通过对带材轧制过程中轧辊表面温度分布情况进行研究,提出采用红外线测温装置在线实时检测轧辊表面温度,从而更加及时准确的控制轧辊分段冷却水流量,使得轧辊冷却的工艺性能得以优化;同时也对测温装置的布置位置进行了分析,最终确定了合理的安装位置。     

基于冗余计量和短消息传输的水源井监测系统开发

山钢股份济南分公司在水源井采用V锥流量计和电能表,应用嵌入式系统和sMs短消息技术进行信息处理,实现了计量冗余和数据远程采集,保证了全天候的有效准确计量,使用户能够随时掌握水源井动态,掌握水泵的开启与关停隋况。     

能源计量联网管理系统与远传水表在企业中的应用

本文介绍了能源计量联网管理系统(ENMS)的构成,远传水表的选用与安装及ENMS与远传水表在工厂的应用实践效果。     

Pitot-Static Tube System to Measure Discharges from Wells

Pumps are widely used to lift water into canals, and usually spill directly into the canal. Upstream pipe fittings frequently produce a distorted flow profile that is detrimental to the proper installation and operation of common pipe meters. Thus, meter calibration may be necessary when the pipe length upstream of the meter is less than recommended. Meter calibrations under field conditions can be difficult and expensive. A simple pitot tube system that can be clamped to the outlet of the pump discharge pipe was built and tested for measuring and calibrating pump discharges under field conditions. It is used to detect the velocity at several points across the pipe diameter; distorted profiles can be measured. Using this information, the meter technician can determine whether a correction in the meter coefficient will suffice and if flow conditioning equipment is working effectively. The system can be constructed using common shop techniques and standard small pipe fittings. Most previous pitot systems required special ports in the pipe or used special concentric tube constructions that are difficult to build.     

热水技术在南（京）钢—烧厂的应用

介绍了供热水装置的设计计算及安装方法，通过生产实践，证明了热水技术在烧结工艺中所起的作用。     

Volumetric flow rate comparisons for water and product on pasteurization systems

A flow calibration tube system was assembled to determine the volumetric flow rates for water and various dairy products through a holding tube, using three different flow promotion methods. With the homogenizer, the volumetric flow rates of water and reconstituted skim milk were within 1.5% of each other. With the positive displacement pump, the flow rate for reconstituted skim milk increased compared with that for water as the pressure increased or temperature decreased. The largest increase in flow rate was at 310-kPa gauge and 20 degrees C. On a magnetic flow meter system, the volumetric flow rates of water and reconstituted skim milk were within .5% of the flow rate measured from the volume collected in a calibrated tank. The flow rate of whole milk was similar to that of skim milk on the three flow promoters evaluated. Ice milk mix increased the flow rate of the positive displacement pump, but not the homogenizer and magnetic flow meter system.     

Detection of metals in tissues, cells and subcellular organelles

The Perometer, a device designed for the measurement of limb volume, has been rigorously assessed by comparison with other methods. Differences in the volume of geometric shapes and limbs determined by the Perometer and a tape measure/meter rule (i.e., Perometer minus direct measurement) were -0.8 to 2.4% (cylinders), -4.6% (truncated cone), -3.3% (mannequin limbs), 6.1% (normal human arms) and 6.8% (lymphedema arms). The larger differences were likely to be due to deviation from circular or elliptical cross-section (Perometer or tape method) and compression of the arm (tape method). Errors arising from incorrect positioning within the measuring frame were generally small, but large errors occurred when a cylinder was partially rotated within the frame (i.e., no longer perpendicular to the light beams). The Perometer was highly reproducible, each measurement taking only a few seconds. When recording the change in volume with time of a segment of arm during venous occlusion (blood flow measurement by venous occlusion plethysmography) using the Perometer plus a mercury strain gauge, between-method differences for individual blood flow recordings were apparent. The source of these differences is discussed. However, using the average of a number of blood flow recordings the Perometer and the strain gauge agreed fairly closely for both the normal and lymphedema arms. The Perometer is thus a reliable and convenient tool for the measurement of limb volume, and may also be used to measure the rate of swelling during venous occlusion plethysmography.     

宝钢二炼钢RH脱碳推定模型的研发和应用

针对二炼钢RH没有排气流量仪的实际情况,创建了不依赖于排气流量仪的钢水碳浓度动态推定模型,并取得了良好的应用效果.文章介绍了宝钢该脱碳推定模型的建模思路、研发过程和应用情况.二炼钢RH增设排气流量仪后,脱碳模型有两种利用排气流量数据的方法,即基于测量的方法和基于推定的方法.文章详细论证了两种方法的优缺点,提出应该在原模型结构基础上,继续采用基于推定的方法利用排气流量数据.     

70钢小方坯芯部质量优化

建立小方坯连铸凝固传热模型,通过测温和射钉试验校核模型,模型计算结果与测温和射钉试验结果间的相对误差分别为0.1％和0.64％,说明模型能够有效反映小方坯连铸的凝固传热情况.提高拉速后,铸坯的中心偏析和疏松加重.为优化高拉速下连铸坯的中心质量,依据模型计算结果及前人安装经验,将末端电磁搅拌安装装置由原来距离结晶器弯月面...