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
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