M1080B无心外圆磨床改进

M1080B无心外圆磨床砂轮及导轮宽度较窄,磨削轴承套圈外圆时,磨削效率低,托板架调整较为繁琐、皮带打滑、磨损较为严重。针对上述问题,提出了相应的解决办法,提高了磨削效率。     

聚丙烯装置聚合区设备布置及管廊的配管设计

结合工程特点及工艺流程,阐述了300 kt/a聚丙烯装置的布置原则,管道、管架设计要点和方法,以及需要注意的问题。     

Collection Conduits Including Subsurface Drains

Numerous types of pipes and channels with spatially increasing flows in environmental engineering applications are identified by type and function and referred to as collection conduits. An overview of methods for designing and analyzing collection conduits is provided. Full conduits with nonuniform and uniform inflow are first considered. Dimensional analysis is then employed to demonstrate the relationship between variables for open channels; that leads to the identification of possibilities for generalized numerical solutions. Prior collection conduit applications are discussed within the framework of the dimensional analysis (which also pertains to some constant-flow applications). A previously unpublished generalized numerical solution for rectangular collection conduits is presented. Subsurface drains are addressed with particular emphasis, including the use of numerical methods to develop a new generalized chart and relation to other design methods. Among the important conclusions for subsurface drains is that the somewhat common practice of using Manning’s equation alone for such problems is not generally adequate. Examples and practical design suggestions are included, and the use of computer-based numerical methods is discussed more generally.     

PTA装置压力离心机冲洗新技术

分析了仪征化纤PTA装置压力离心机运转效果不佳的原因,提出解决方案,改造实施后取得了很好的效果。     

长距离曲线顶管在杭州河坊街工程中的应用

对杭州市重点工程—杭州河坊街长距离曲线顶管进行了总结和介绍 ,可为同类工程借鉴和参考     

消减空压机气流脉动方法的探讨

根据气流脉动的机理，提出了解决空压机常见的机组枷管过振动问题的一些具体措施。     

聚氨酯泡沫夹克管生产材料的代用

介绍一种用于生产聚氨酯泡沫夹克管保温层的新材料聚酯聚醚，报道选用这种材料生产泡沫夹克管的工艺及工要工艺参数和产品达到的技术指标及现场应用情况。     

气—液式热管换热器在硫酸工业中的应用研究

本文研制的气－液式热管换热器应用于硫酸生产中ＳＯ３气体的余热回收。它具有传热性能好、流动阻力小、寿命长、体积小、节能效果显著和易清垢等优点。     

修井作业中的自动起下管柱系统探讨

目前在油田修井作业中起下管柱的人工作业量大、工作效率低、危险性大、工作条件差。提出了一种自动起下管柱作业系统,主要包括通井机、井架、液压钳、筒式吊卡、卡瓦支座、立式排管架和控制系统等,支座卡瓦为弹性体微条嵌入式结构,筒式吊卡能自动卡入和松开管柱接箍,排管架可实现管柱的立式排放,控制系统协调各部分的工作。该系统构思新颖,结构简单,技术可行,并能够与现有修井设备配合使用,实现油田修井作业的自动化。     

BIMORPH PIEZOELECTRIC ACTUATOR FOR SMALL PIPE ROBOT

An experimental bimorph piezoelectric element (PZT) actuator for small pipe robot is developed. The robot can move in φ20 mm pipe, and can carry a CCD camera for detecting cracks or fine holes on inner surface of pipe. The velocity of the robot can reach 17～22 mm/s for vertical pipe up/down, respectively. Moving principle and its performance characteristics are presented.