Suction device for cleaning a bottom surface of a structure of at least 15,000 m3

A suction device for thoroughly cleaning a bottom surface of a structure, covered with a non-porous plastic liner, that contains a body of water larger than 15,000 m3 for recreational use with color, transparency and cleanness characteristics similar to swimming pools or tropical seas at low cost, the device operating by suctioning impurities from the bottom surface by a pumping system of the structure, wherein the device comprises:

• a structural frame,
• a cover covering the structural frame and including at least one suction connection in fluid communication with the pumping system,
• a propelling device to move the suction device around the bottom surface of the structure,
• rollers or wheels operatively coupled to the structural frame for movement of the suction device over the bottom surface to be cleaned,
• a fixed brush line operatively coupled to the structural frame to remove precipitated impurities from the bottom surface of the structure, and
• bottom suction pipes, in fluid communication with the at least one suction connection, and arranged and configured to suction the impurities from the bottom surface of the structure.