Overflow valve for isolating air

Abstract

The invention discloses an overflow valve for isolating air. The overflow valve comprises an overflow body, a buoy and a sealing piece. A cavity is formed in the overflow body, and a water inlet pipeand a water outlet pipe communicated with the cavity are arranged at the top and the bottom of the overflow body respectively. The buoy is arranged above the overflow body, a guide column is fixedly arranged at the bottom of the buoy, a guide sleeve used for limiting the guide column in the radial direction is fixedly arranged in the overflow body, and one end of the guide column penetrates through the guide sleeve and extends into the cavity. The sealing piece is fixedly arranged on the bottom of the guide column, and the bottom of the sealing piece is in sealing fit with the top of the drainage pipe. Under normal circumstances, the sealing piece is in sealing fit with the top of the drainage pipe due to the gravity effect of the buoy, so that the drainage port of the drainage valve is isolated from outside air, the outside air cannot enter the drainage port from the water inlet pipe, the drainage port is almost in a full-pipe water state, and the drainage speed is greatly increased through the siphonic effect; and when the water level exceeds the buoy by a certain height, the buoy floats upwards, and the sealing piece is separated from the drainage pipe sealing face to achieve overflowing.

Description

technical field [0001] The invention relates to the bathroom field, in particular to an air-isolated overflow valve. Background technique [0002] In the prior art, the overflow pipe on the side of the toilet drain valve is connected with the drain outlet at the bottom of the drain valve. Under the normal water-stop state, the outside air communicates with the drain port of the drain valve base through the overflow pipe. When an overflow occurs, water flows from the overflow pipe to the drain at the base of the drain valve and into the toilet pipe. When the drain valve is opened, the water flows out through the drain port of the drain valve base. During normal use, since the drain port of the drain valve base communicates with the outside air through the overflow pipe channel, when draining, a negative pressure will be generated in the drain channel, and the outside world will Under the action of atmospheric pressure, air will be mixed into the drain outlet of the drain va...

AI Technical Summary

Problems solved by technology

When the drain valve is opened, the water flows out through the drain port of the drain valve base. During normal use, since the drain port of the drain valve base communicates with the outside air through the overflow pipe channel, when draining, a negative pressu

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