FAQ >> BELT CONVEYORS

BELT CONVEYORS

A belt conveyor system consists essentially of an endless belt of resilient material connected between two flat pulleys and moved by rotating one of the pulleys by the electric motor. Normally material is fed on the belt near the other end pulley. The moving belt carrying the material towards the driver pulley is likely to sag between the two end pulleys due to its self-weight and pay load. That is why the belt is supported both on the carrying side and tile return side by a number of rollers, called the idlers. As the belt is always under tension, it is prone to elongation resulting in slackness over the pulleys and loss of tension and power. That is why some kind of device for tensioning the belt is incorporated in the system. This tensioning device is known as take-up arrangemenL The system is inherently very simple.

INTRODUCTION TO BELT CONVEYOR

Belt conveyors have attained a dominant position in transporting bulk materials due to a number of inherent advantages like the economy and safety of operation, reliability, versatility and practically unlimited range of capacities. In addition, they are suitable for performing numerous processing function while supporting a continuous flow of material between operations.

Belt conveyors are most versatile and widely used mechanical conveyors. They are used for transportation, feeding, discharging bulk solid material. This conveyor is suitable to almost dry type of material free flowing solid to met stocky and lumpy powders. Normal belt may be conveyed at angle of inclination of upto 22. The bulk material on the belt conveyor is discharged over the drive pulley of other conveyors.

The capacity of belt conveyor depends on speed, shape and width of belt, method of feeding and solid properties. Belt conveyor are the most common form of material handling system used in manufacturing and mining industries thermal plants and in construction projects.

Heavy industries like steel, fertilizer, chemi, .i and cement etc. cannot function without the belt conveyors. In construction project the belt conveyors are used for handling. The material in asphalt plant, crushing and screening plants, aggregates mixing plants etc. In coal mining and other mining industries these arc used for handling coal or other raw material The belt conveyors arc capable of conveying large quantities of material continuously over considerably long distances at a fast speed. For transporting the material for short distances conveyors may be a portable or a fixed unit.

When a belt conveyor system is to be used to transport for a considerable distance upto several kilometers in such cases, the system consists of a number of flights. Each flight is a complete conveyor unit discharging its load on the tail end of the successive unit. Belt used in the system are costly and hence needed to be carefully maintained. The belts are generally made of rubber cover cotton or rayon laid up in the plies. The strength of the rubber belt depends on number of plies, canvas plies. Wooden wire mesh and steel belts are also used depending upon the strength required for the conveyor to conveying various types of materials, their quantity to be transported etc. Belts are specified by width, number of plies and weight of each layer of ply.

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