超低温环境下钢骨架聚乙烯管道熔接技术研究

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中图分类号：TG47；TU785

Research on installation technology of steel-reinforced polyethylene pipes in cryogenic environments

YIN Yanjie’， ZHOU Yi2 ，CAO Ertao’，SUN Yang1，LI Qiang' （1. China National Gold Engineering Co.，Ltd.，Mining Branch，Xi’an 71OooO，China； 2.School of Mechanical and Electrical Engineering，Xi'an Technological University，Xi'an 71OO21，China）

Abstract： This paper investigates the electrofusion jointing technology of steel-reinforced polyethylene （SRPE） composite pipes during underground pipeline construction in cryogenic regions of Northern China （below-20 C ）.It focuses on optimizing fusion parameters，thermal insulation，controlled cooling and crystallzation，and fiting gapadjustments under cryogenic conditions.Through theoretical analysisand experimental validation，a dynamic compensation algorithm for fusion parameters suitable for cryogenic environments and integrated construction methodologies have been proposed. These methods were applied to the Wushan 5O OOO tons/day low-grade copper ore heap leaching project in Hulunbuir， Inner Mongolia. The study demonstrates that this technology significantly enhances joint integrity，minimizes material wastage，expedites construction timelines， and reduces overall project costs，providing valuable insights for similar engineering endeavors.

Key words： stel-reinforced polyethylene pipe; electrofusion jointing;electrofusion welding；cryogenic environment; fusion parameter optimization；controlled crystalization；modular construction techniques

0 前言

钢骨架聚乙烯塑料复合管1因其耐磨、刚柔相济、耐低温等优良性能，在北方寒冷地区供水、消防、工艺等埋地管道的应用日益广泛。（剩余5199字）