INDUSTRIAL CONTROL CIRCUITS 217 9 . 12 CONVEYOR SYSTEM

INDUSTRIAL CONTROL CIRCUITS 217 9 . 12 CONVEYOR SYSTEM

INDUSTRIAL CONTROL CIRCUITS 217 9 . 12 CONVEYOR SYSTEM

industrial control circuits 217 9 12 conveyor system

industrial control circuits 217 9 12 conveyor system

INDUSTRIAL CONTROL CIRCUITS 217 9 . 12 CONVEYOR SYSTEM In large plants , materials are shifted from the place of storage to near the machines for processing , through belt conveyors . Finished products from the machines are also carried away through conveyors . Infact , any heavy material can be transported by conveyors . For example in airports , luggage of passengers is transferred through belt conveyors . The drive for such belt conveyors is an electric motor . A conveyor consists of a rubber belt about 3/4 to 1 metre wide tightly fitted over two pulleys as shown in Fig . 9 . 26 . One pulley is coupled to the motor through a gear box as the belt is required to move at a slower speed as compared to the motor speed . The pulley which is coupled with the motor is shown as drive pulley while the other pulley is called the tail pulley . As the belt is fitted tightly over the two pulleys , rotation of the drive pulley will cause movement of the belt over the two pulleys . A number of such conveyors may be used to shift material from one place to the other at different heights . The number of conveyors in a system can be very large depending upon the requirement . One example of a small conveyor system with 5 conveyors has been shown in Fig . 9 . 27 . In this system the final product from plant is first stored in silos (large containers) with the help of conveyors . As shown in Fig . 9 . 27, conveyors 1 and 2 feed material into silos , 1 and 2 . Diverters are provided on conveyor 2 . When diverter 1 is down , material will fall in silos 1 and when diverter 1 is up and diverter 2 is down material will fall in silos 2 . When both the silos are filled proximity switches provided in silos will actuate and stop conveyors 1 and 2 . Finished product from silos can be taken out through gates on to conveyor 2 and taken to packaging machine through conveyors 3, 4 and 5

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