Multi-layer water sealing device and multi-layer water sealing method
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United States of America Patent
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Aug 27, 2019
Grant Date -
Jul 20, 2017
app pub date -
Jun 24, 2015
filing date -
Jun 30, 2014
priority date (Note) -
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Abstract
A multi-layer water sealing device, includes at least two layers of water seal sequentially arranged from top to bottom. An upper-layer water seal has a floating bell-shaped cover structure, and the floating bell-shaped cover structure includes a water sealing box and a floating bell-shaped cover arranged in the water sealing box. A lower-layer water seal is arranged in a drain pipe below the floating bell-shaped cover, and one side of the water sealing box is extended to form or connected to a communication cavity offset from the drain pipe. The floating bell-shaped cover correspondingly is extended to form or connected to a floating component floatable in the communication cavity and offset from the drain pipe.
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