Importance

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Abstract

Disclosed is a positive and negative pressure resistant sealing apparatus of a balance shaft two-way valve plate used for a drainage pipeline, which relates to the technical field of sewer line water seal protection. The apparatus comprises: a main body, a pressure conductor and a balance shaft two-way powered valve plate; the main body comprises a pressure conduction cavity and a drainage cavity, the pressure conduction cavity is located on one side of the drainage cavity, and the pressure conductor is arranged in the pressure conduction cavity of the main body. In the present invention, the effects of a pressure conduction membrane, a transmission connecting rod and the pressure conductor make it so that when the pressure at an upper end of a water seal is greater than the pressure at the lower end, a pressure membrane abuts against and holds in place the pressure conductor, causing the pressure conductor to have a downward movement trend, and causing the pressure conductor to push the transmission connecting rod, further causing the transmission connecting rod to abuts against and hold in place a supporting rod, preventing the supporting rod from forming a rotating trend to push the balance shaft two-way powered valve plate, further preventing the balance shaft two-way powered valve plate from driving an opening and closing valve plate to open, and thereby effectively preventing odor from spreading in the sewer pipeline.

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First Claim