RGSHY-B型列车制动软管试验机的研制

列车制动软管是列车车辆连接的重要配件,采用人工手动试验设备进行试验,存在劳动强度大、工作效率低、试验数据不准确等问题。为此,我们自行研制了RGSHY-B型列车制动软管试验机,该设备无须安装基础,现场工艺配套极为方便而且美观,自投入生产以来,深受现场工人和领导的好评。本文重点介绍了该设备的主要技术参数、机械传动系统,气动试验系统。

正压氦检漏的几个技术问题

本文针对工业检漏中氦质谱仪正压检漏技术发展的现状,讨论了压力容器和压力管道不宜直接采用真空检漏的原因,介绍了正压检漏“标准漏率”装置的结构原理和使用方法,提出了一种实用的不同气体漏率代换方法,最后介绍了两种有利于提高正压检漏灵敏度的管接头结构形式。

观测仪器：探测渗漏的新方法

York Sensors公司使用光纤测量局部温度变化。该装置也可用于测量挡水建筑物中的渗漏水及水化热，最近首次被运用于水坝和水渠。

自主化制动系统C5修检修技术要求探讨

通过对运用时间达到6年的制动系统进行常温、低温性能及泄漏试验,并对制动柜部件进行拆解检查,结合试验结果以及拆解情况进行分析总结,提出自主化制动系统检修建议,提升制动系统检修后的运用质量。

Study of the Positioning Influence in the Water Activity Measurement during Leak Test of Iodine-125 Seeds

In the prostate cancer treatment, brachytherapy with iodine-125 seeds has been used. lodine-125 seeds are sealed radioactive sources, made by a titanium capsule containing the radioisotope inside. In the final phase of the seeds production, it is necessary to ensure that there is no leakage of the radioactive material. A leakage test is performed, immersing the seeds in water during 24 h and measuring the resulting activity in the water. This measurement is made in a sodium iodide detector. The immersion water is transferred to a plastic tube with a cap. The tube is placed by an automated positioning system, in the detector chamber. This study aims to determine the best positioning of the tube for the detection. It is also important to determine the influence of the positioning variation intrinsic of the automated positioning system during the iodine-125 seeds production. The results obtained will be used as a reference to adjust the equipment and process control system, in the production of the iodine-125 seeds.