Catalogue

Plants, equipment and machines for water treatment

GPSR

The sub vertical plane climber screen is installed on medium and large size civil or industrial wastewater treatment plants and complies with macro-screening requirements.
This screen consists of a sturdy frame properly sized, made of steel standard sections and press-bended metal sheets, a filtering screen, a rake-carriage, a gear motor, a system of cog rails, a system for rake cleaning and a dynamometric torque limiting device.
The filtering screen, inclined on the downstream, consists of a group of bars of rectangular profile fixed together to provide the required clear spacing between the bars.
The rake-carriage is equipped with a system for climbing on the vertical cog rails complete with guide rollers, cog wheels, drive, and arm with rake.
They are not necessary transmission chains, but the gearbox, installed on rake-carriage, directly transmits the motion to the cog wheels that can climb on the cog rails in a balanced way.
Moreover in absence of power supply it is able to keep the rake-carriage in its position avoiding the fallen back towards the bottom.
Rake arm length allows the complete absence of mechanical moving parts in water.
For the rake cleaning an articulated system complete with scraping blade in high density polyethylene is fitted on stainless steel supports.
The screen is provided with a device to stop the rake outside water during pauses.
The screenings settled on screen bars are caught and lifted by the screening rake fitted on the rake-carriage while it climbs on the cog rails.
The cleaning process follows four steps: the rake is activated downward from the park position out of water, when the rake rotates around the bottom dead center the rake arm rotates to the bars causing the rake teeth to engage the bars, so the rake moves upward cleaning the bars and lifting the screenings to the discharge point where it engages the scraping blade, it is cleaned and then it moves to the park position out of water.
The mechanism is designed in such a way that the rake can climb over and be free of materials encountered that cannot be removed.
After the object has been by-passed, the rake will engage again the screen and will continue the cleaning of the bars. In case the load on the rake carriage mechanism increases beyond a set value the load limiter stops the motor.
When the overload condition has been corrected, the motor can be activated again by a manual push button.
If necessary the operator can reverse the rake assembly motion by a manual operated electric control.

Strenghts

• ABSENCE OF TRANSMISSION CHAINS.
• EASY MAINTENANCE.
• POSSIBILITY TO REACH HIGH DISCHARGE LEVEL.
• ABSENCE OF MECHANICAL PARTS MOVING IN WATER.
• STURDINESS.