The device applied in sewers and drains to prevent return of insects, rodents and smell

摘要

"The device applied in sewers and drains to prevent return of insects, rodents and smell".Whose purpose is to automatically close the manhole or drain after the passage of normal water and waste, obstructing the return of insects, animals, rodents, and smell.Using this device on any abstraction of water, liquids and chemicals, waste industrial, residential, property, rural and drain on public roads.The device is constituted of the structure built in iron, steel, galvanized sheet, fiber, polyethylene, plastic, glass, iron, copper, aluminum, zinc, polycarbonate.PVC and similar, with different dimensions, depending on the need.Internally, the structure has one or more caps that allow the normal flow of waste, opening up as the flow and closing automatically.This closure occurs through springs which pull the cap back on, with the pin out of the center, counter weight hinges or gears. The structure has anchor bolts for fixation.