Flap valve

Abstract

The invention relates to an anti-tide flap valve along river and coast, especially relates to an improvement of the flap valve structure. The invention provides a flap valve capable of reliably beingclosed during external tide rising and forming a component force to open the valve utilizing the water flow during internal water discharging. The flap valve comprises a valve cover and a valve body,the valve body is fixedly connected outside a water discharging hole, a ribbed slab is arranged at the middle lower part in the valve cover, wherein, the ribbed slab and an inner surface of the valvecover can form a water containing cavity. The invention is provided with a water containing ribbed slab at the back side of the valve cover. When the water is charged, the self weight of the valve canbe increased to improve the resistance of the valve when the valve bottom side is beaten by the external tide; when the water is discharged from inside, under the conditions that the self weight of the valve is heavy and the water flow force is small, the component force capable of opening the valve can be formed under the water flow impact effect on the ribbed slab, which is convenient for opening the valve.

Description

technical field [0001] The invention relates to a dampproof flap door along the river and sea coast, in particular to the improvement of the flap door structure. Background technique [0002] The flap door is a one-way valve device installed on the sea, river, riverside, and at the outlet of the drainage pipe. When the tide is higher than the water level in the pipe, the flap door can be automatically closed to prevent the tide from entering the pipe and prevent sea, river, and river water from entering the pipeline. pour back. When the tide comes ashore under the action of the wind, the water on the shore can flow into the river through the flap gate. Present flap door structure is made of door cover, door body, and vertical elevation is 3~5 ° inclination angle, is beneficial to flap door and closes tightly under the action of gravity. In actual use, when the impact force of tides and waves is large, and the impact height is at the lower edge of the flap door, the flap do...

AI Technical Summary

Problems solved by technology

In addition, when the internal drainage is low, it is difficult to open the heavy flap door when the impact force of the water flow is low.

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