CN110549689A - 一种耐高温耐气体渗透的大口径热力修复管 - Google Patents
一种耐高温耐气体渗透的大口径热力修复管 Download PDFInfo
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Abstract
本发明公开了一种耐高温耐气体渗透的大口径热力修复管，从外到内分别为高分子弹性外层、无缝增强层、高分子弹性内层，所述无缝增强层为经线和纬线编织的管状物，所述高分子弹性外层与高分子弹性内层材料包括基材、补强剂、填料、增塑剂、增粘剂、功能性助剂，所述基材为卤化丁基橡胶XIIR和三元乙丙橡胶EPDM共同聚合。本发明不仅可以直接单独使用，也可作为金属管道内衬使用，还可作为修复管道泄漏时紧急替换使用以维持正常运转。本发明所述大口径热力修复管可在130℃高温水蒸气、高温天然气等环境下连续使用，并可在150℃高温条件下短期使用，其气体渗透量仅为TPU/TPV的10%‑20%，且材料成本约为TPU/TPV的60%‑80%。
Description
技术领域
本发明属于软管材料领域，具体涉及一种耐高温耐气体渗透的大口径热力修复管。
背景技术
大口径热力修复管是为输送热蒸汽和天然气而专门设计开发的修复软管，软管骨架是高强度纤维编织的无缝增强层，并在其内外层敷上高分子弹性材料。非开挖修复是指在不开挖地表的前提下，将软管沿原管道直接牵引穿入，保证原有的压力及流量等指标不变，以替代原管道输送热蒸汽和天然气。与开挖施工技术相比，非开挖修复的主要优点是：(1)非开挖施工可不阻断交通、不破坏道路和植被，因而可以避免开挖施工所带来的对居民生活和交通的干扰，以及对环境、建筑物基础的破坏或影响；(2) 在施工难以进行或根本不允许进行的情况下(如穿越河流、湖泊、交通干线、重要建筑物、特殊障碍物和繁华市区等)，采用非开挖技术可使管线施工成为可能， 并且可将管线设计在施工工程量最经济合理的地点穿过；(3) 有较好的经济效益和社会效益，特别是当埋深和管径越大时，其效益更加明显。采用非开挖内衬管修复技术可以对整体管道进行维修，减少了逐年修复的成本和时间，同时内衬管作为新的管道穿入旧管道，其稳定性较之局部修补要高得多，使用寿命20年以上，可以有效杜绝3-5年内的损坏和修复。
目前，热力修复管采用的高分子弹性体材料以热塑性弹性体TPU和TPV为主，该类材料具有成型加工性好、工艺简单、强度适中等优点，且可在120℃以下的环境中长期使用。然而，该类材料也存在一些弊端，如气密性不是特别优异，在一定压力下长距离输送会发生气体渗透；材料成本偏高，导致修复管的整体价格较高。因此，发明一种性能接近或更优、气密性更好、成本更低的材料来替代热塑性弹性体TPU/TPV应用于大口径热力修复管具有重大意义。
发明内容
为解决上述问题，本发明公开了一种耐高温耐气体渗透的大口径热力修复管，是一种大口径软管，不仅可以直接单独使用，也可作为金属管道内衬使用，还可作为修复管道泄漏时紧急替换使用以维持正常运转。
为达到上述目的，本发明的技术方案如下：
一种耐高温耐气体渗透的大口径热力修复管，从外到内分别为高分子弹性外层、无缝增强层、高分子弹性内层，所述无缝增强层为经线和纬线编织的管状物，所述高分子弹性外层敷设在无缝增强层的外侧，所述高分子弹性内层敷设在无缝增强层的内侧，所述高分子弹性外层与高分子弹性内层材料包括基材、补强剂、填料、增塑剂、增粘剂、功能性助剂，所述基材为卤化丁基橡胶XIIR和三元乙丙橡胶EPDM共同聚合。
作为本发明的一种改进，所述基材为卤化丁基橡胶XIIR和三元乙丙橡胶EPDM共同聚合，所述卤化丁基橡胶包括但不限于溴化丁基橡胶BIIR和氯化丁基橡胶CIIR；所述三元乙丙橡胶包括亚乙基降冰片烯ENB和双环戊二烯DCPD作为第三单体的乙烯丙烯基聚合物，其中乙烯含量在45%-70%之间，第三单体含量介于1%-11%之间，作为优选，选择第三单体含量2%-5%的EPDM。
作为本发明的一种改进，所述补强剂为白炭黑，包括普通沉淀法白炭黑和高结构白炭黑，作为优选，选用高结构高分散白炭黑。
作为本发明的一种改进，所述填料为高温煅烧高岭土。
作为本发明的一种改进，所述增塑剂为石蜡油和烃类树脂混合物；石蜡油包括各种牌号的石蜡油，作为优选，选择美国太阳石油公司的高闪点石蜡油2250或2280。
作为本发明的一种改进，选用间甲增粘体系，包括亚甲基接受体和亚甲基给与体的各种材料，以保证本发明所述热力修复管在长期高温使用时的橡胶和编织增强层的粘合强度，作为优选，所述增粘剂为间苯二酚甲醛树脂和六甲氧甲基三聚氰胺HMMM。
作为本发明的一种改进，所述功能性助剂为氧化锌、氧化镁、硬脂酸、硅烷偶联剂、防老剂，硅烷偶联剂使用Si69及以有效成分为Si69的各种硅烷偶联剂如TESPT。
作为本发明的一种改进，所述高分子弹性外层与高分子弹性内层材料配方为：基材的卤化丁基橡胶XIIRR 60-100份、EPDM橡胶NBR 0-40份；补强剂的白炭黑40-80份；填料的高温煅烧高岭土0-30份；增塑剂的石蜡油3-15份、烃类树脂混合物3-8份；增粘剂的间苯二酚甲醛树脂1-6份、六甲氧甲基三聚氰胺HMMM1-6份；功能性助剂的氧化锌 3-8份、氧化镁0.5-3份、硬脂酸 1-3份、硅烷偶联剂Si69 2-4份、防老剂1-5份。
作为本发明的一种改进，所述无缝增强层为一层或者二层，高分子弹性外层与高分子弹性内层为一层或者多层。
作为本发明的一种改进，所述无缝增强层为涤纶、芳纶或其他高强度纤维。
作为本发明的一种改进，所述高分子弹性外层与高分子弹性内层材料相同，同时挤出且可调节厚度。
本发明的有益效果是：
本发明所述的耐高温耐气体渗透的大口径热力修复管可在130℃高温水蒸气、高温天然气等环境下连续使用，并可在150℃高温条件下短期使用，其气体渗透量仅为TPU/TPV的10%-20%，且材料成本约为TPU/TPV的60%-80%。本发明所述软管不仅可以直接单独使用，也可作为金属管道内衬使用，还可作为修复管道泄漏时紧急替换使用以维持正常运转。
具体实施方式
下面结合具体实施方式，进一步阐明本发明，应理解下述具体实施方式仅用于说明本发明而不用于限制本发明的范围。
本发明实施例配方如下：
对上述各实施例及对比例制得的胶料进行性能测试，其中：
门尼粘度：100℃，预热1min，测试4min；
门尼焦烧：127℃，测试T5（焦烧时间）；
物性测试硫化条件：160℃*20min。
120℃*1000h高温蒸汽老化后物性测试结果
用本方案及TPU制得的大口径热力管道修复管，进行气密性测试，结果如下：
本发明方案所公开的技术手段不仅限于上述实施方式所公开的技术手段，还包括由以上技术特征任意组合所组成的技术方案。
Claims (10)
1.一种耐高温耐气体渗透的大口径热力修复管，其特征在于：从外到内分别为高分子弹性外层、无缝增强层、高分子弹性内层，所述无缝增强层为经线和纬线编织的管状物，所述高分子弹性外层敷设在无缝增强层的外侧，所述高分子弹性内层敷设在无缝增强层的内侧，所述高分子弹性外层与高分子弹性内层材料包括基材、补强剂、填料、增塑剂、增粘剂、功能性助剂，所述基材为卤化丁基橡胶XIIR和三元乙丙橡胶EPDM共同聚合。
2.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述补强剂为白炭黑。
3.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述填料为高温煅烧高岭土。
4.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述增塑剂为石蜡油和烃类树脂混合物。
5.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述增粘剂为间苯二酚甲醛树脂和六甲氧甲基三聚氰胺HMMM。
6.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述功能性助剂为氧化锌、氧化镁、硬脂酸、硅烷偶联剂、防老剂。
7.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述高分子弹性外层与高分子弹性内层材料配方为：基材的卤化丁基橡胶XIIRR 60-100份、EPDM橡胶NBR 0-40份；补强剂的白炭黑40-80份；填料的高温煅烧高岭土0-30份；增塑剂的石蜡油3-15份、烃类树脂混合物3-8份；增粘剂的间苯二酚甲醛树脂1-6份、六甲氧甲基三聚氰胺HMMM1-6份；功能性助剂的氧化锌 3-8份、氧化镁0.5-3份、硬脂酸 1-3份、硅烷偶联剂Si69 2-4份、防老剂1-5份。
8.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述无缝增强层为一层或者二层，高分子弹性外层与高分子弹性内层为一层或者多层。
9.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述无缝增强层材料为涤纶、芳纶或其他高强度纤维。
10.根据权利要求1所述的一种耐高温耐气体渗透的大口径热力修复管，其特征在于：所述高分子弹性外层与高分子弹性内层材料相同，同时挤出且可调节厚度。
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