| 摘要 |
PURPOSE: A sewage counterflow and odor blocking device united to a cover and a support is provided to clear the drain clogged by refuse simply. CONSTITUTION: The sewage counterflow and odor blocking device united to a cover and a support comprises: a frame part containing many frames(4) arranged evenly and a lever valve hinge groove(4-2) formed on the frame; a valve part composed of a lever valve instrument coupled with the lever valve hinge groove and a rectangular lever instrument coupled with a rectangular valve hinge groove(4-1); and a cover part containing a plane drainage groove(6) provided with many through holes, a long bar-shaped flow-resistant relief projection(1-1), an inclined drainage groove(7) projected upward and many nonskid relieves(1-2) projected for silp-proofing.
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