Conveyor Belt

PRESENTED BY-ANKIT SUKHWAL

B.E Final yearC.T.A.E. Udaipur

Guided by-Dr. S. Jindal Sir

Conveyor belts are used in a wide variety of material transport applications such as manufacturing, food processing, and heavy industry.

Belt- are the most common type of conveyors and are very versatile.

Introduction

Working of Belt

The belt consists of one or more layers of material.

◦ An under layer-to provide linear strength and shape called a carcass(polyester, nylon and cotton)

◦ An over layer called the cover. (rubber or plastic compounds)

Belt

Belts are typically made from cotton, canvas, Kevlar, nitrile, nylon, polyester, polyurethane/urethane, PVC, rubber, silicone, steel cord, Teflon, wire mesh or weave.

Belt material

Rubber Interply

Top Cover

Bottom Cover

The actual belt of a system is determined on what the conveyor is going to be used for. Items to consider when choosing a belt.

Size of items being moved Weight of items shape of items

This will help decide what belt to use so coefficients of friction can stay low so the motors wont be over worked.

Belt Design

Flexibility Transverse rigidity Low mass per unit length High strength Simplicity and inexpensive Longer life Should not stretch under normal working

stresses ,i.e., low relative elongation. Wear resistant Fire resistant

Essential Propertiesof belt

Belt speed Belt width Absorbed power Gear box selection Drive pulley shaft

Parameters for design

• Agriculture

• Construction - heavy building materials

• Food and beverage processing

• Forestry - logging, sawmill, paper pulp, etc.

• Mining and quarrying

• Factory production line

Commercial applications

Belt conveyor can be used for abrasive, wet, dry, sticky or dirty material.

Higher capacity can be handled than any other form of conveyor at a considerably lower cost per tonne kilometre.

Longer distances can be covered more economically.

It can be horizontal, incline or decline or combination of all.

Advantages

The belt needs higher initial tension.

Higher elongation of the belt (4% elongation may take place at the working load).

Conveying of sticky material is associated with problems of cleaning and discharge causing poor productivity.

Limitations

Width of belt (mm) Type of carcass (fabrics) Rated breaking strength (n/mm) Number of fabric plies Top and bottom cover thickness (mm)

Specification of Belt

TYPICAL EXAMPLE OF BELT CONVEYOR IN A MINE

Apron Feeder

Scalping grizzly feeder

(Primary Crusher Discharge) Vibrating screen

(Fines)

Middlings

Gyratory crusher

To Tert. conv

Belt Conveyor systems can improve efficiency and help to reduce repetitive lifting and carrying.

Many industries use Belt conveyor systems to transport raw materials and products through the stages of a process or to and from storage.

Conclusion

Conveyor Handbook by Fenner Dunlop (Jun 2009)

Materials Handling Handbook by David E. Mulcahy , McGraw-Hill, 1999 

http://intinno.iitkgp.ernet.in/courses/951/wfiles/153173

References and Useful links

Thank You