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    • 6. 发明授权
    • Double sealed, double wall insulated SPA pipe coupling
    • 双密封双壁隔热SPA管接头
    • US4804210A
    • 1989-02-14
    • US61375
    • 1987-06-15
    • James W. Hancock
    • James W. Hancock
    • F16L59/20F16L59/22F16L59/14
    • F16L59/22F16L59/20Y10S285/915
    • A job site formed double sealed, double wall insulated spa pipe coupling is effected between two axially connected coupling components each having a plastic inner pipe and a concentric plastic outer pipe of considerably larger diameter with the pipes being connected by in situ foam insulation filing the space between the pipes. One component has the outer pipe and the foam insulation severed to expose the bare outer periphery of the inner pipe over a short length. The second component similarly formed includes a radially enlarged section over a short length to define a radially enlarged hub. An annular cylindrical collar of a length equal to the length of the hub is adhesively fixed on its inner periphery to the outer diameter of the outer pipe of the first component. The bare inner pipe is adhesively coated and fixed insertably into the interior of the radially enlarged inner pipe at said hub and an annular cylindrical coupler having a length equal to the combined axial length of the collar and the hub and having an inner diameter equal to the outer diameter of the collar and hub is adhesively sealed concentrically about the collar and hub to complete the double sealed pipe coupling.
    • 工作现场形成双重密封,双壁隔热水疗管接头在两个轴向连接的联接部件之间进行,每个连接部件均具有相当大直径的塑料内管和同心塑料外管,管道通过原位泡沫绝缘连接空间 管道之间。 一个部件具有外管,并且泡沫绝缘体被切断以在较短的长度上露出内管的裸露外周。 类似地形成的第二部件包括在较短长度上的径向扩大部分以限定径向扩大的轮毂。 长度等于轮毂长度的环形圆柱形套环的内周与第一部件外管的外径粘接固定。 裸内管被粘合地涂覆并固定在所述毂处的径向放大的内管的内部,以及环形圆柱形联接器,其长度等于套环和毂的组合轴向长度,并具有等于 轴环和轮毂的外径以套筒和轮毂相同的方式被密封地密封以完成双重密封的管接头。