非开挖用改性聚丙烯电缆保护管检测数据分析与性能优化

Analysis of Testing Data and Performance Optimization of Modified Polypropylene Cable Protection Tube for Non Excavation Use

以非开挖用改性聚丙烯(MPP)电缆保护管的试验检测结果为样本,对保护管各项检测指标与标准要求之间的相对差值进行了计算,并以此对MPP保护管的质量控制以及现有标准要求的优化措施进行了分析研究。结果表明:目前的生产技术已基本能够满足标准中对MPP保护管壁厚、环刚度、不圆度、耐外冲击等指标要求;当应用场景对保护管力学性能具有更高要求时,可以通过适当增加保护管壁厚的方式来提高相应性能;针对试验检测结果中达标率较低的保护管最大内径尺寸和维卡软化温度,除了进一步优化保护管的成分配比和制备工艺。适当放宽标准中对MPP保护管最大内径尺寸上限值的要求,或许是优化现有标准并提升保护管性能的一个可行方法。

Based on the experimental results of non-excavation modified polypropylene(MPP)plastic cable pro⁃tection pipes,the relative differences between the various detection indicators of the protection pipes and the stan⁃dard requirements were calculated.Based on this,the quality control of MPP protection pipes and the optimiza⁃tion measures required by existing standards were analyzed and studied.The results show that the current produc⁃tion technology can basically meet the requirements of the standard for the wall thickness,ring stiffness,out of roundness,and external impact resistance of MPP protective pipes.At the same time,analysis indicates that when the application scenario has higher requirements for the mechanical properties of protective pipes,the corre⁃sponding performance can be improved by moderately increasing the wall thickness of protective pipes.In response to the low compliance rate of the maximum inner diameter size and Vicat softening temperature of the protective tube in the experimental detection results,in addition to further optimizing the composition ratio and preparation process of the protective tube,moderately relaxing the requirements for the upper limit of the maximum inner di⁃ameter size of MPP protective tube in the standard may be a feasible method to optimize the existing standards and improve the performance of the protective tube.