炉前加料称量系统分析

玻璃窑炉玻璃液位是电子玻璃窑炉自动化控制系统中重要热工参数之一,窑炉池内玻璃液面波动变化过大,造成池壁砖和底板砖的蚀损加快,直接影响产品质量和生产效益。玻璃液面是依靠加入窑炉配合料的数量与流出窑炉的玻璃液数量相平衡来保持稳定的,所以炉前加料系统的稳定与否直接关系到窑炉内部液位的波动,为了满足玻璃液位测量和控制精度越来越高的要求,炉前加料系统必须保证加料平稳,称量准确,调整反应迅速。     

基于PLC触摸屏设计的天然气输送管道多参量监测系统实现方法

针对玻璃窑炉用气压力高于管网供气压力的问题,为了保证天然气的安全输送,设计了以PLC为控制核心,采用组态软件设计界面的玻璃窑炉用气管道的多参量监测系统,实现了对增压后的管道内压力、流量、温度等参数的实时在线监测,满足了玻璃窑炉的用气安全与燃气管网供给技术要求。     

基于现场控制机的玻璃窑炉控制系统的设计和实现

介绍了一种采用现场总线结构的玻璃窑炉集散控制系统的设计。该系统采用三台模块化现场控制机对玻璃窑炉的炉温、料道与料盆的温度、窑压、及料位等进行检测与控制；对蓄热室温度、烟道温度、煤气出口温度、煤气出口压力、窑炉两边辐射温度进行检测；采用一台工控机作为上位机，对现场控制机进行参数设定、优化控制和数据采集、显示、历史查询等操作。使窑炉在最佳工艺状态下运行。     

用二次曲线极小值原理实现玻璃窑炉燃烧系统优化控制

运用二次曲线的极小值特性,采用变步长逼近的递推算法,通过对玻璃窑炉燃烧系统二次风流量与重油流量最佳燃烧比的自动寻优,实现了玻璃窑炉燃烧系统的优化控制.     

一种玻璃工业窑炉应用的高性能/价格比的自控系统典型方案

(一)序言玻璃工业池炉是耗能较大的工业窑炉,关系产品质量的玻璃料液的质量又直接取决于燃烧控制水平,同时炉龄的延长也与自动控制有很大关系,据有关资料统计,国外先进国家的玻璃窑炉的熔化率比我国高达2倍,炉龄比我国高达2～3倍。而燃料消耗比我国低到1/2左右。目前我国的玻璃工业窑炉的燃烧自动控制系统已有了多种类型,我所综合了计算机集中控制(单板机及系统机),集中分散型控制,常规模拟仪表控制及专用电子控制装置等等各种系统的特点,     

空气助燃窑炉换向期间压力补偿方案设计

窑炉压力是玻璃熔制过程中的主要控制参数之一,压力的波动直接影响到温度和液位的稳定.采用烟道开口补气的设计方案对窑炉换向期间的压力下降进行补偿,从而减小压力波动,稳定窑炉温度.     

基于ABC-DPC算法的玻璃窑炉能耗异常检测

针对传统的窑炉异常检测方法易受主观因素干扰且存在异常冗余报错的情况,提出一种基于人工蜂群算法的密度峰值聚类(ABC-DPC)的玻璃窑炉能耗异常检测方法。该方法针对密度峰值聚类存在人工设定参数和无法自动划分簇中心和离群点的不足,以人工蜂群算法实现了截断距离的自适应优选过程,并设立离群系数策略以实现自动划分簇中心和离群点的功能。研究了玻璃窑炉的分层能耗模型,并基于此导出能耗特征值,然后应用ABC-DPC算法实现窑炉异常能耗的聚类检测。实验结果表明,所提出算法较于经典聚类算法,检测准确率较高,而且能实时地检测窑炉的能耗异常状况。     

玻璃固化熔炉出料管预疏通

焦耳加热陶瓷熔炉是玻璃固化工艺的核心设备，炉内玻璃固化体通过底部出料方式浇注到产品容器内。为解决熔炉出料堵塞问题，检查了出料管内部情况，结合民用窑炉堵塞处理方法，搭建了试验平台。钻杆摆动对比试验表明，试验装置钻杆摆动略大，预疏通装置更稳定；通过振动试验评估了试验装置稳定性。模拟疏通试验表明，该试验装置稳定可靠。采用研制的预疏通装置对出料管内的硬质堵塞物进行了清理，炉内料液成功流出，为解决出料堵塞问题积累了经验。     

马蹄焰玻璃窑能耗建模分析及节能优化探讨

针对马蹄焰玻璃窑能耗特点和能流分析,提出一种创新性的结构划分模型分析方法。结构划分模型把整个马蹄焰玻璃窑炉的工艺流程划分为三级结构,并逐级展开分析建模。采用物料守恒与热平衡分析建立整个玻璃窑的能耗模型,并以某玻璃厂为实例,利用MATLAB对模型结果仿真分析,研究结果表明烟气带走近50%的热量,同时窑体散热损失也是玻璃窑能耗的一大部分。     

应用微电子技术改造传统工业

近几年来,我省应用微电子技术改造传统工业,提高企业技术水平和管理水平,取得了成果。一、微机控制传统加热炉我省已先后在冶金加热、玻璃窑炉、工业锅炉、电厂锅炉、炼钢电炉、高炉、小合成氨造气炉、井式电炉、隧道炉、电解槽、     

用体视显微镜改制体视摄影器

详细地介绍了XSD型体视显微镜改制体视摄影器的方法与效果。并提出摄影接筒的长度可为30～225mm,其变化对摄影器总的放大倍数没有影响。     

Formation of a flange from a flat blank with a hole

A model of axisymmetric formation of a flange from a flat blank with a hole by expanding by a hard punch with a fixed flat flange is given, taking into consideration contact friction, change of wall thickness, strengthening of material, and the tool bending radius. Elastic, elastic-plastic and hard-plastic process stages are studied.     

变遗憾为精彩

从我做杂志起,我就知道自己选择了一个创造遗憾的职业,一个需要不停地变遗憾为精彩的职业。 每期杂志的出版都使我惴惴不安,在反思杂志的不足与期盼您评判到来中度过,在深入的思考与尖锐的批评中杂志不断汲取了营养,     

Collision between a ring and a beam

With car–parapet collision accidents in mind, a normal collision between a free-flying half ring and a simply supported beam with/without axial constraints is studied, in which an elastic–plastic half ring with an attached mass and the elastic–plastic beam are taken as the simplest models of a car and a parapet, respectively. Particular attention is paid to the energy partitioning between the two structures and the evolution of the contact regions during collision. A mass–spring finite difference (MS–FD) model is employed whilst the large deflection and axial stretching/compression are incorporated. The numerical results show that the less stiff (i.e. softer) structure will dissipate more energy and the contact regions will move away from the initial contact points. With the increase of the relative thickness of the beam to the ring, the final deformation of the half ring will transform from a “U” shape to a “W” shape.     

高效镜面抛光技术

一次加工就可将刀槽表面抛光到镜面质量。DIAMETAL公司最新开发的MNT-MS金刚石砂轮以其卓越的加工能力而备受关注。他们甚至还可以一次就加工完成深度达若干毫米的刀槽。     

集散控制系统在啤酒厂糖化车间的应用

本文简介了工控组态软件 T350 0、欧陆下位机的特点 ,给出了一个在啤酒厂糖化车间应用的实例。     

Estimation of a Bottom Echo-Signal Level Reflected from a Plane Surface of a Cylindrical Article Using a Normal Probe Operating in a Pulsed Mode

The influence of the pulsed operating mode on a bottom echo-signal level reflected from a plane surface of a cylindrical article is studied during variations in the article's radius. It is shown that the pulsed character of a signal smoothens this function significantly as compared to that in the previously computed continuous mode. Numerical estimates of the bottom echo signal have been made for the ultrasonic inspection of wheel-pair axles of railway vehicles.     

八关节三动杆蛇形机器人的运动模拟

蛇形机器人是一种高冗余度的机器人,由于其结构可变形,能够通过松软地面以及跨越(或避开)障碍物,能代替人完成某些危险场所如核电厂等维修及城市搜救.本文提出了一种类正弦波形的八关节三动杆蛇形机器人结构,做了运动模拟并给出了结论,该蛇形机器人的研制成功为设计相关类型的机器人提供了参考.     

Imprinting a needle array on a polycarbonate substrate

A micro-needle array was fabricated on a polycarbonate (PC) substrate using an electroformed-Ni mold with a conical concave pattern. The diameter and length of each needle were 50 μm and 135 μm, respectively. The needle array pattern of the electroformed-Ni mold was produced by combining a grayscale mask for X-ray lithography with Ni electroforming technology. The X-ray grayscale mask was composed of Si absorbers and a SU-8 membrane. Each Si absorber had a three-dimensional cone shape rather than a rectangular shape. Threedimensional Si structures were formed to etch an active Si layer in a silicon-on-insulator wafer using a taperedtrench etching technology. Beamline BL-4 in the TERAS synchrotron radiation facility at AIST was used for the Xray lithography experiments. X-rays that penetrated the X-ray grayscale mask irradiated a polymethylmethacrylate (PMMA) sheet. Pt was deposited on the PMMA structure after developing, and Ni was electroformed on it. The electroformed-Ni object was processed by grinding to complete a Ni mold. Finally, the micro-needle array was fabricated by thermal-imprinting on a 0.5-mm thick PC sheet with the electroformed Ni mold.