Belt Conveyor Types | Troughed Belt Conveyor | Flat Belt Conveyor

Types of conveyor:

  • Troughed belt conveyor
  • Flat belt conveyor

Troughed belt conveyor:

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Troughed belt conveyor is that in which the belt forms a trough on the carrying side while running over idler rollers which are either in set of 5 rolls, 3 rolls or 2 rolls. The troughing angle adopted are: 15°, 20° , 25° , 30° , 35° , 40° , 45° . Return idlers are usually straight roller type.

Transverse flexibility or rigidity of the belt is another significant consideration. It is important that the belt trough properly. The empty conveyor belt must make sufficient contact with the center roll in order to track properly.

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Troughed belt conveyors are used for higher capacity, higher speed requirement, and for handling bulk material of large lump size. It suitable for inclined or declined type conveyors.

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Transition distance is defined as the distance from the center line of the first fully troughed idler roll to the center line of either the head or tail pulley. The distance from the pulley to the top of the wing idler is certainly greater than the distance from the pulley to the center roll of the troughing set. If the transition distance is too short, the edge of the belt can be over stretched. This will adversely affect the load support and belt life.

Flat belt conveyor:

Flat belt conveyor is that in which the belt runs flat on the carrying side over straight roller type idler or a set of idlers.

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Flat belt conveyors are suitable for lower capacity, low speed requirement and for handling unit goods or bulk material of small lump size and higher angle of repose. Declination is undesirable.

Belt Conveyor Belt Specification | Belt Conveyor Standards | Selection Of Belt Drive | Belt Conveyor Selection

Selection of Conveyor belt:

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To select the correct conveyor belt for your application involves a large number of considerations. Final selection may very well represent a compromise between what is desired and what is available.

To assist you in obtaining the proper information required to select a proper belt construction, the following check list is provided.

1. Material Conveyed

a. General description

b. Density, pounds per cubic foot (pcf)

c. Lump size

d. Presence of oils or chemicals, if any

e. Maximum temperature of load, if hot

f. Requirements of fire resistance

2. Maximum loading rate or required maximum capacity, tons (2000) lbs. per hour (tph)

3. Belt

a. Belt width, inches

b. Belt speed, feet per minute ((fpm)

c. Belt Type

d. Thickness of Top and Bottom Cover (inch)

4. Drive

a. Type

b. Voltage

c. Frequency

d. Motor power

e. Motor Speed

5. Center of center distance (length) of Belt

6. Profile of Conveyor

a. Profile distance along conveyor path

b. Elevations

c. Locations of all vertical curves and angle of slope

7. Drive

a. Single-pulley or two-pulley

b. If two-pulley, geared tandem or dual-drive

c. If dual-drive, distribution of total motor horsepower at primary and secondary drive pulleys

d. Angle of belt warp on drive pulley(s)

e. Location of drive

f. Pulley surface, bare or lagged. Type of lagging

g. Type of starting to be employed

8. Pulley

a. Head Pulley Type

b. Drive Drum Diameter

c. Tail Diameter

d. Snab pulley Diameter

e. Angle of Wrap on drive Pulley

9. Take-up

a. Type

b. Location

c. Take up Pulley Diameter

d. Bend pulley Diameter

e. Take up movement

10. Idlers

a. Idler Trough Angle (30 Deg)

b. Type of Carrying Idler, Type of Return Idler, Type of Impact Idler, Type of Training Idler

c. Carrying Idler Diameter, Return Idler Diameter

d. Spacing, including transition distance at head and tail

e. Carrying Idler Pitch, Return idler pitch

11. Type of loading arrangement

a. Chutes

b. Free-fall distance, lumps to belt

c. Skirt board length

12. Lowest cold weather operating temperature anticipated, if applicable

13. Type of belt splice to be used

14. Design Conditions

a. Altitude (example.18m)

b. Material (Ex. Iron Ore Pellets)

c. Bulk Density (Ex. 2.1 t/m3)

d. Angle of Repose (Ex. 30 Degree)

e. Ambient Temperature (Ex. 38 deg. Celsius)

f. Material Characteristics (Ex. Very abrasive)

g. Rated capacity (Ex.1800 t/h)

h. Design Capacity (Ex. 2100 t/h)

i. Conveyor Slope Angle (Ex. 9.5 Degree)

j. Belt conveyor horizontal length (Ex.200 m)

k. Belt conveyor lift length (Ex. 35 m)

l. Belt conveyor length (Centers of Head & Tail) (Ex. 200 m)