管外喷涂机器人的行走系统设计

管外喷涂机器人的行走系统采用双驱动轮式行走方式,设计了管外喷涂机器人的行走系统及行走轮的管径适应调节与锁紧装置,该行走系统能适应于管径变化范围在60mm以内的管外机器人,该行走系统具有可避障、管径自适应调节、结构简单等优点.     

火箭管路的应力腐蚀及其预防措施

主要结合国内外运载火箭地面试验和飞行试验过程中出现的管路应力腐蚀问题进行分析,并结合火箭特定的环境总结了产生应力腐蚀的原因,同时有针对性地提出了预防管路应力腐蚀的几项措施.     

吉林省天然气产业发展战略初探

随着"气化吉林"惠民工程的实施,吉林省的天然气产业将在未来几年内取得长足的发展,而与此同时,如何提高基础较薄弱的吉林省天然气利用比率也成为产业发展的关键。本文对吉林省天然气行业进行了分析及预测,着重阐述了提高吉林省天然气利用比率的策略,分析了省域天然气行业发展战略及产业趋势。     

基于漏磁的管端自动探伤方法与装备

在分析钢管漏磁检测端部效应及其消除机理的基础上,提出了利用漏磁检测技术对钢管端部进行自动探伤的方法——端部移接法,即采用导磁构件来收集钢管端部泄漏磁场,并对端部磁路加以引导,借用另外的导磁构件与钢管端部对接后形成新的端部,使得原端部变为管体,从而减小钢管端部盲区。设计了磁路引导装置和探头,介绍了基于漏磁的管端自动探伤机的结构组成、原理和管端自动检测流程。该检测方法及装备可以将钢管端部的检测盲区控制在30mm以内。     

顶管沿线建筑物及管线的保护措施

顶管是目前国内管道设计常用的一种施工方法,本文通过工程实例,从设计角度介绍了上海中心城区道路下顶管施工对周边建筑物、管线的保护处理措施。     

VB在开发SGO3束管生产线控制系统中的应用

本文主要阐述利用VB开发SG03束管生产线计算机监控程序,实现和OMRON PLC以及智能仪表通讯以实现生产线控制方面的一些问题,论述在中小规模的控制系统之中,使用VB作为开发工具具有巨大的灵活性和经济性。     

Optimization of drinking water distribution networks: Computer-based methods and constructal design

A well-known application of water engineering is drinking water distribution through pipe networks in urban and rural areas. The present work addresses this issue with a specific focus on the network design. First, the paper presents a brief review of computer-based design methods and shows that a significant number of efforts have been pursued. Secondly, it proposes the approach of geometric analysis of the distribution networks as complementary points of the former optimization methods. Finally, an original illustrative application is proposed. The geometric and multi-scale optimization known as the constructal design is used to analytically optimize T-shaped network architectures subject to an operational water quality constraint. This illustrative application leads to the determination of an optimal geometry of the network that minimizes head losses (factor of pumping energy).     

监控系统中间结果的截取技术研究与实现

针对广电行业设备多、类型复杂、监控程序多且难以用一种方法进行监控的现状，本文采用一种变通的方式，利用设备或系统自身所提供的功能，通过截取技术获取的中间运行结果，将其结果为我所用。最后，通过程序验证了该方法的可行性和有效性。     

Influence of tension and release in piped conveyor belt on change of normal contact forces in hexagonal idler housing for pipe conveyor loaded with material

Every kind of transported bulk material influences operational characteristics of the pipe conveyors significantly. Therefore it is necessary so that users of the pipe belt conveyors are able to perform a more detailed investigation and monitoring of these characteristics. Thanks to information concerning the operational characteristics it is possible to analyse durability of the conveyor belt and extent of belt wearing. However, the process of data collection and identification is demanding and expensive on condition that such process would be realised only by means of measuring equipment. Much more effective is obtaining of the needed information using generalized knowledge in the form of graphs. Every operator of the pipe belt conveyor is able to obtain the required information based on known input values using the corresponding graphs. Afterwards, the obtained information can be applied in a real operation. This article deals with determination of the contact force values for a certain type of the conveyor belt. The contact forces can be estimated in the intersection of axis at the individual idler roll positions in dependence on the tension force and in dependence on the filling rate of the cross-sectional area of the piped belt with the material, taking into consideration the performed experimental measurements.     

提高数控车床加工反扣油管效率的探索

反扣油管在江汉油田打捞作业中发挥的作用越来越大,已成为打捞作业常用工具。原加工方式不合理导致启停反复和转塔式刀架安装局限导致加工刀具安全受限是造成反扣油管反复启停、耗时长的原因。中国石化江汉油田分公司江汉采油厂对数控车床的反扣加工进行了改进,经过反复论证,提出了反刀反车思路,通过部分改进,使加工一步到位,提高了反扣油管加工效率,为反扣加工找到了新方法。