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波纹补偿器在直埋热力管线工程中的应用　

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波纹补偿器在直埋热力管线工程中的应用　 >G4*aL"xSQ
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为实现小区居民优质冷热源的全天候供应，slimming capsule ginseng royal jelly detox foot pad detox foot pad 小区内埋设了管径为φ50一φ500，总长约30000m的直埋热力管线。管线介质温度分别为7/12℃(空调冷水)，60/50℃(空调热水)，60℃(生产热水),95/70℃(采暖热水),120/80℃(高温热水)。slimming capsule ginseng royal jelly ginseng royal jelly 热力管道保温 Uz+>~D*KP
直埋热力管线介质温度从夏季的7℃到冬季的60℃，由管线施工时的20℃到运行时的120℃，最大温差为100℃。直线管段长度由一般的30-200m，从而给直埋热力管线中热力补偿器的选用、设置、施工增加了一定的难度。热力工程管道工程供热工程复合管聚氨酯管因此，正确地选用、安装波纹补偿器，吸收入补偿管线热胀冷缩产生的位移;减小管线因温度变化而产生'的冷热应力;避免因应力集中对管线造成破坏;防止事故发生是直埋热力管线工程设计、施工中不可忽视的重要环节。 M@bZ>7mwi
2 以自然补偿替代元件补偿，减少补偿器的设置在直埋热力管线的设计、热力保温聚氨酯直埋保温管直埋保温管聚氨酯发泡施工中均要求按施工及验收规范回填一定要求的黄砂。当管线上部为非承压地面时，且热力管外保护壳为聚乙烯外壳时，热力管与土壤或黄砂之间的摩擦系数明显减小，这无疑为热力管线在温度变化时产生自由位移提供了有利条件，热力管的摩擦长度由此得以相应延长。从而可相应减少或免除补偿器的设置。当然，热力管线在夏季施工时选定较高的气温下管(一般应高于20℃)，使热力管线的施工接近无补偿直埋敷设工艺，也是减少或免除补偿器设置约有效方法之一。值得注意的是当热力管线采用玻璃钢保护壳时，保温工程保温管聚氨酯发泡机核磁共振由于玻璃布和涂料的混合缠绕，造成保护壳外表面凹凸不平，使得摩擦阻力增大，导致管线的摩擦长度缩短。这时，不仅不能随意减少补偿器的设置，反而应当相应增加补偿器的设置数量。 TO*JUXw
利用热力管线走向的各种折弯(如L型弯、Z型弯等)进行自然补偿，由此减少补偿器的设置数量。从而降低热力管线的工程造价，减少事故隐患，提高热力管线运行的可靠性，是热力管线工程中解决应力补偿的首选方案。顺应居住生活质量不断提高的发展趋势鼓风机风机聚乙烯醇防腐木满足小区居民对能源消耗不断增大的需要，在小区4台35t/h供热锅炉房的基础上增装了2台6MW的供热式汽轮发电机组，以热、电、冷、生活热水四联供的方式不热电联产，为小区居民提供高效、优质、低耗的生活热源。从而在节约能源、保护环境、减轻大气污染、降低城市噪声以及提高劳动生产率等方面为城市的居民供热及热能消费模式上走出了一条新路。为实现小区居民优质冷热源的全天候供应，聚乙烯醇跑步机客户管理软件密封条小区内埋设了管径为φ50一φ500，总长约30000m的直埋热力管线。管线介质温度分别为7/12℃(空调冷水)，60/50℃(空调热水)，60℃(生产热水),95/70℃(采暖热水),120/80℃(高温热水)。 6h"2esydD
直埋热力管线介质温度从夏季的7℃到冬季的60℃，由管线施工时的20℃到运行时的120℃，最大温差为100℃。直线管段长度由一般的30-200m，从而给直埋热力管线中热力补偿器的选用升降机北京画室混凝土外加剂、设置、施工增加了一定的难度。因此，正确地选用、安装波纹补偿器，吸收入补偿管线热胀冷缩产生的位移;减小管线因温度变化而产生'的冷热应力;避免因应力集中对管线造成破坏;防止事故发生是直埋热力管线工程设计、施工中不可忽视的重要环节。 ~)\I-mQiD
2 以自然补偿替代元件补偿，减少补偿器的设置在直埋热力管线的设计、无机铝盐防水剂除湿机集成吊顶光盘制作施工中均要求按施工及验收规范回填一定要求的黄砂。当管线上部为非承压地面时，且热力管外保护壳为聚乙烯外壳时，热力管与土壤或黄砂之间的摩擦系数明显减小，这无疑为热力管线在温度变化时产生自由位移提供了有利条件，热力管的摩擦长度由此得以相应延长。从而可相应减少或免除补偿器的设置。 |N'P,14
当然，热力管线在夏季施工时选定较高的气温下管(一般应高于20℃)，屏蔽网线激光对中仪冷库打标机使热力管线的施工接近无补偿直埋敷设工艺，也是减少或免除补偿器设置约有效方法之一。值得注意的是当热力管线采用玻璃钢保护壳时，由于玻璃布和涂料的混合缠绕，造成保护壳外表面凹凸不平，使得摩擦阻力增大，导致管线的摩擦长度缩短。这时，不仅不能随意减少补偿器的设置，反而应当相应增加补偿器的设置数量。利用热力管线走向的各种折弯(如L型弯、Z型弯等)进行自然补偿，由此减少补偿器的设置数量。从而降低热力管线的工程造价，减少事故隐患，提高热力管线运行的可靠性，是热力管线工程中解决应力补偿的首选方案。 oc$%]'":-
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