直埋热力管道钢套钢外滑动结构应用实例..doc

直埋热力管道钢套钢外滑动结构 应用实例 摘要： 近几年，随着我国各项事业的飞速发展，城镇居民对生活品质舒适性的要求和城镇建设环保节能要求的不断提高，“热电联产”事业得到了前所未有的发展。而与热电联产事业密切相关的蒸汽管道直埋技术因其特殊性和重要性逐渐成为国内供热行业攻关重点。近年来通过广大技术人员长期不懈的努力，在蒸汽管道直埋技术的研究、相关产品开发和管理方面都取得了长足进步，并大量应用于工程实践。本文将直埋蒸汽管道Application example of the outside sliding structure of “steel sheathed steel” of directly-buried thermal pipe HU Mao-Hui (TAISHAN FIBERGLASS INC.,Taian 271000,China) Abstract: In recent years, along with the fast development of every undertaking in our country, and the increasing demands for the urban residents on the comfort of the quality of living and environment protection and energy conservation in the town construction, the cause of “combined heat and power” (CHP) has acquired unprecedented development. The technology of direct-buried steam pipe, which was closely related to CHP and had some particularity and significance, has gradually become the key projects in the domestic heating industry. Recently, through a long period of hard work of many technicians, considerable progress has achieved in the investigation of the technology of direct-buried steam pipe and the development and management of some related products, and the technology was widely applied to the engineering practice. In this paper, application example of the outside sliding structure of “steel sheathed steel” of directly-buried thermal pipe was studied, and can make people understand the structure more deeply and widely than before. Key words: directly-buried thermal pipe; outside sliding structure; steel sheathed steel; compensator; corrosion protection of fiber reinforced plastics 某开发区直埋供热管，冬季的供汽能力１０吨／小时，的直埋蒸汽供热管道公里，在具体的工程实践中直埋敷设常会遇到各种各样的具体问题，从设计角度讲如何处理好这些问题对于整个工程来讲是非常重要的。本文主要介绍设计直埋敷设热力管道的一些实以供大家参考。有关直埋管网设计理论目前，国内采用的外滑动钢套钢结构型式（钢地沟）基本上是仿照国外直埋蒸汽管道型式德国、美国采用外滑动式，即绑缚着保温材料的工作钢管在钢外护层内滑动。只有意大利萨克索姆公司是采用工作钢管在保温层内滑动，即内滑动式（但他们没有设内滑动层）。外滑动结构有些资料称其为有空气层复合保温结构，分为抽真空式和不抽真空式不抽真空式。其结构由内向外分别为工作管、保温层、空气层、钢套管、防腐层。 1)芯管及端封 2)芯管 3)外护钢管端封 4)外防腐层 5)外护钢管 6)铝箔反射层 7)离心玻璃棉 8)导向支架组件 9)空气层 10)不锈钢打包带