Overflow weir device capable of automatically adjusting water level of subsurface flow constructed wetland

Abstract

An overflow weir device capable of automatically adjusting the water level of a subsurface flow constructed wetland comprises a hollow shell; the lower portion of the shell is connected with a horizontal water inlet; a water outlet is formed in the side face of the middle of the shell; an electromagnet and a magnetic lifting movable water retaining column located below the electromagnet are arranged in the shell; the movable water retaining column is connected with the bottom of the shell through a buffer spring; the electromagnet is powered on, ascending and descending of the movable water blocking column are controlled through magnetic force, and then whether an orifice in the side face of the water passing channel is communicated with the water outlet or not and the height of the communication position during communication are controlled. The device has the advantages of reasonable structure, high control precision and the like, and can realize that the water level in the constructed wetland is below the icing surface in winter cold seasons in northern China, thereby effectively preventing the freezing problem of the constructed wetland in winter.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to an overflow weir device capable of automatically adjusting the water level of an underflow artificial wetland. Background technique [0002] Constructed wetland is a typical sewage ecological treatment mode. Because it has the advantages of low operating cost, simple maintenance and management, significant ecological and environmental benefits and less investment, after more than half a century of development, its theoretical research has become increasingly mature, and has been It is widely used in the treatment of various types of sewage around the world. However, in the northern region, especially when the temperature is low in winter, not only the treatment effect of the constructed wetland on pollutants will be affected, which will greatly reduce the removal efficiency of pollutants, but will also cause many kinds of problems such as freezing of packing laye...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problems such as the freezing of the subsurface wetland in the cold season in the north and the decrease of the treatment effect, the purpose of the present invention is to provide an overflow weir device that can automatically adjust the water level of the subsurface wetland, which can change the water level inside the wetland in real time by changing the position of the weir mouth height, in order to achieve the purpose of antifreeze

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