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    AN INSULATED FLUID DUCT
    2.
    发明公开
    AN INSULATED FLUID DUCT 有权
    绝缘流体导管

    公开(公告)号：EP2583015A2

    公开(公告)日：2013-04-24

    申请号：EP11727749.1

    申请日：2011-06-17

    申请人： Spirax-Sarco Limited

    发明人： MILLER, Jeremy ,  FRISBY, Ben ,  MASKREY, Adrian ,  SPRACKLING, Simon

    IPC分类号： F16L59/065

    CPC分类号： F16L59/065 ,  F16L59/14

    摘要： A duct or duct section (1) comprises an inner pipe (3) for conveying a fluid such as steam generated by a steam plant and an outer pipe (2) enclosing the inner pipe (3). There is a vacuum in the space (4) between the inner pipe (3) and the outer pipe (2) to provide thermal insulation for the inner pipe (3). With this arrangement, there is no need to provide thermal insulation material around the outer pipe (2) and so the duct or duct section is suitable for use in clean environments. An indicator (12) is provided on the outer pipe (2) to indicate failure of the vacuum in the space (4). The indicator may comprise a coating of a heat sensitive material which changes appearance, for example by changing colour, in the event of a rise in the temperature of the outer pipe caused by failure of the vacuum.

    摘要翻译： 管道或管道部分（1）包括用于输送诸如由蒸汽设备产生的蒸汽的流体的内管（3）和包围内管（3）的外管（2）。 内管（3）和外管（2）之间的空间（4）中有一个真空，为内管（3）提供绝热。 采用这种布置，不需要在外管（2）周围提供隔热材料，因此管道或管道部分适合在清洁环境中使用。 指示器（12）设置在外管（2）上以指示空间（4）中的真空故障。 指示器可以包括热敏材料的涂层，该热敏材料在由于真空失效而引起的外管温度升高的情况下例如通过改变颜色来改变外观。