Drainage gas isolating device for preventing gas backflow and drainage gas isolating cylinder

Abstract

The invention is suitable for a drainage gas isolating device and provides a drainage gas isolating device for preventing the backflow of waste gas or bacterial and toxic gas. The drainage gas isolating device comprises a water inlet pipe, a drainage gas isolating cylinder and a water outlet pipe, wherein the drainage gas isolating cylinder is provided with a water outlet; the lower end of the drainage gas isolating cylinder is connected with the water inlet pipe, and the water outlet is connected with the water outlet pipe; the drainage gas isolating device also comprises a floating valve which can be clamped at the lower part of the drainage gas isolating cylinder in a sealing way when no water is in the drainage gas isolating cylinder; the floating valve is positioned in the drainage gas isolating cylinder; the diameter of the floating valve is larger than that of the lower part of the drainage gas isolating cylinder; a rubber ring is arranged on the inner wall of the lower part ofthe drainage gas isolating cylinder. The invention has simple structure, and the design achieves the aims of dually protecting the gas against backflow and preventing the waste gas or the bacterial and toxic gas from flowing back to a room.

Description

technical field [0001] The invention relates to a drainage air trap, in particular to a drainage air trap and a drainage air trap for preventing waste gas or bacteria-containing or poisonous gas from flowing backward. Background technique [0002] As people pay more and more attention to the details of the living environment, such as the installation of the home, the reasonable and scientific design of living equipment, etc., in the buildings where people live, drainage devices are indispensable equipment in daily life. Dominate people's domestic water and other drainage functions. Without a good trap in the drain, the gas will back up and people will smell the exhaust from the drain opening and feel uncomfortable if they inhale it. [0003] The current drainage device designed to prevent gas backflow is U-shaped. When the drainage is completed, because the drainage device is U-shaped, water will accumulate in the lower part of the U-shaped pipe, and the water seal formed a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a drainage air trap and a drainage air trap to prevent gas backflow, aiming to solve the problem that the drainage device in the prior art cannot prevent gas backflow well

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