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1. 发明申请

US20140283926A1 Foldable, Double-Block and Bleed Plugging Tool 审中-公开
标题翻译：可折叠，双块和流出堵塞工具
公开(公告)号：US20140283926A1
公开(公告)日：2014-09-25
申请号：US13847285
申请日：2013-03-19
申请人： Joshua Duell
发明人： Joshua Duell
IPC分类号： F16K31/60
CPC分类号： F16K31/60 , F16K1/221 , F16K1/222 , F16K1/223 , F16L55/124 , Y10T137/6113
摘要： An isolation tool for temporarily isolating a section of pipeline has foldable semi-circular sealing element halves that, when unfolded, combine to form a primary and secondary sealing element. The element halves unfold by rotating an inner bar about an outer bar. A bleed hole permits any fluid which leaks past the primary sealing element and into the annular space between the sealing elements to enter a longitudinal bleed passageway located within the tool itself, thereby eliminating the need for a bleed port or valve to be welded onto the pipeline. The tool, which is pressure balanced, is well adapted for use in applications in which the lateral access opening is significantly smaller in diameter than the pipe diameter.
摘要翻译：用于临时隔离管道部分的隔离工具具有可折叠的半圆形密封元件半部，其在展开时结合形成初级和次级密封元件。元件半部通过围绕外杆旋转内部杆而展开。泄放孔允许任何泄漏通过主密封元件并进入密封元件之间的环形空间的流体进入位于工具本身内的纵向排放通道，从而不需要将焊接到管道上的排放口或阀门。压力平衡的工具适用于直径大于管道直径的横向进入开口的应用中。

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