Multi rake bar screen is a mechanically cleaning screen that is installed in the inlet works of treatment plants, pumping stations and water inlet structures to capture solid materials that otherwise would be harmful to the following processes and to the downstream equipment. The possibility of clogging is minimized by using several rakes which are lined on a pair of endless chain instead of one rake which is operated by an arm. We can supply specially manufactured rakes with screen openings up to 5 mm for efficient use for fine screening applications needing small screen opening.
Multi rake bar screen consists of several main parts which are as follows –
Screen Frame is the main structure of the screen and is made of standard sectional or folded steel plate which is bent in U shape. The whole framework can be fabricated of mild steel with an epoxy coating or hot dip galvanized or in stainless steel. The screen bars are manufactured from standard bars and bolted to frame. Bars are designed as rectangular or trapezoidal sections depending on the application. As an alternative, carbon steel and stainless steel material are available.
The dead plate is formed from a steel or stainless steel sheet and is fixed to the upper main body by bolts. It is connected to discharge chute by welding. The discharge chute helps to capture screenings to drop to a conveyor or a container. It is made of steel or stainless steel sheet and is welded to the dead plate. The rakes are made up of steel or stainless steel and lined up on to a pair of the endless chain. The rake edges are made from PE to prevent friction between two metal parts for large bar openings. The PE part is mounted to rake via bolts so that it can be replaced when the part is damaged or worn out.
The wiper is designed to clean the rake when discharging debris to the chute. Manufactured from steel or stainless steel wiper has PE edge the same as a rake. The PE edge can be replaced when damaged. The chain mechanism contains two pieces of endless chain and two pieces sprocket which are located in the upper section of the mechanism. The drive system consisting of a motor has IP 55 class protection as standard and a gearbox to reduce motor output speed and supply suitable traveling speed for the rake system. It is directly mounted to drive shaft.