Drum screen SGM

mechanical

Category / Typology
CATEGORY: WATER INTAKE
TYPOLOGY: SCREENS

When to use it
The SGM automatic screen cleaner is designed for intakes with large flow rates of fresh or sea water: hydroelectric plant intakes, cooling water intakes, water treatment and desalination facilities, and industrial water intakes.

How it is made
The SGM consists of a steel support structure with columns carrying a running monorail. A trolley runs on the monorail with four wheels, at least two of which are driven by gearmotors. Power to the trolley components is provided via a festoon multipolar cable or an electric cable reel. An electric hoist mounted on the trolley uses two steel ropes wound on a drum to raise and lower the screening bucket; the hoist includes a self-braking gearmotor, positioning sensors and electromechanical overload protection. Bucket actuation is by two double-acting stainless-steel hydraulic pistons controlled by a hydraulic unit installed on the trolley. A bucket screen collects the screened material.

How it works
The bucket has a fixed lower scraper comb that remains in contact with the screen bars and conveys retained material downward during descent. An upper rotating bucket, driven by the pistons, secures the material during ascent for transport and discharge. The SGM can follow straight, curved or mixed trajectories, enabling cleaning of non-adjacent or non-linear screens. Operation is manual or fully automatic and can target individual screen sections for maintenance or channel draining.

Strengths

• FAST CLEANING OF VERY LARGE CHANNELS
• POSSIBILITY OF WORKING ON NON-STRAIGHT SCREENS
• COMPACT CLEANING UNIT
• REMOTE VISIBLE CONTROL

Characteristics / technical specifications

• Model: SGM
• Application: intakes for hydroelectric plants, cooling, potabilization, desalination, industrial processes
• Support structure: steel columns with running monorail
• Trolley: four-wheel trolley, at least two gearmotor-driven wheels
• Power supply to trolley: festoon multipolar cable or electric cable reel
• Hoist: electric hoist with two steel ropes on drum, self-braking gearmotor, positioning sensors, overload protection
• Bucket actuation: two double-acting stainless-steel hydraulic pistons with hydraulic control unit
• Bucket features: screening bucket, fixed lower scraper comb, upper rotating bucket
• Path capability: straight, curved or mixed trajectories
• Operation modes: manual or fully automatic; selective operation on screen sections
• Designed for large flow rates in fresh and sea water environments