Floating device for the constitution of a floating cover

A floating device to be used in groups to form a floating cover that floats over volumes of water or liquids used in industry, mining and agriculture, directed to reduce evaporation, algae formation and gas emanation, comprising an external shell consisting of covers with outward convexity and lateral edges having a polygonal shape in a plan view, vertical wall surfaces extending from the edges of the covers, wherein each vertical wall surface joins at the level of the middle plane of the device with the edges of an inner shell, wherein:

• the inner shell is formed by upper and lower inner covers having an outward convexity and that join together at their periphery, defining a closed volume filled with air;
• the inner shell extends throughout the middle plane of the device, over an entire horizontal middle plane of the device, thereby defining upper and lower chambers, separated, and with equal volumes, which locate between said inner shell and the covers of the outer shell;
• and
• openings in the covers and lateral openings located above and below the horizontal middle plane, communicating each upper and lower chamber with the environment independently for the exchange of air and liquid;
• wherein openings in the upper inner cover define a liquid outlet, allowing liquid to exit due to gravity and an evacuation slope defined by the outward convexity of the upper inner cover of the inner shell.