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Bucket elevators

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Bucket elevators Basic types Pitched bucket elevator Continuous bucket elevator Belt Conveying material Round steel chain Chain Central chain Bucket elevators Belt ... – PowerPoint PPT presentation

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Tags: bucket | elevators | ores | steel

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Title: Bucket elevators


1
Bucket elevators
Basic types
Pitched bucket elevator
Continuous bucket elevator
Belt
Conveying material
Round steel chain
Chain
Central chain
2
Bucket elevators
Belt bucket elevators
3
Bucket elevators
Chain bucket elevators
Round steel chain
Central chain
4
Bucket elevators
Feeding methods
Scoop-feeded
Fly-feeded
5
Bucket elevators
Discharge methods
Pitched
Continuous
Centrifugal discharge
Perfect discharge
Outside discharge
Inside discharge
6
Bucket elevators
Discharge principle
Inner radius
COG radius
Outer radius
Pole distance
7
Bucket elevators
Capacity calculation
Force calculation
Mass / meter
Sum. resistant coeff.
Mat. flow
Speed
8
Screw conveyors
Transported materials material not sensitive to
the crunching effect of the screw (ashes,
chemicals, fertilizers, food products, meal,
ores, paper pulp, salt, sand...)
Screw types
9
Screw conveyors
Flow direction types
Material in the trough
10
Screw conveyors
Construction
Section A-A
Parts 1 Trough 2 Screw 3 End bearing 4 Head
bearing 5 Hanging bearing
6 Drive motor 7 Coupling 8 Gear 10 Feed
opening 11 Discharge opening
Pushed or pulled screw?
11
Screw conveyors
Required power of a horizontal screw
Capacity of a horizontal screw
P ?h?Iv?(L?fH) in W ?h Bulk density Iv
Volumetric capacity L Horizontal distance of
start and end points H Height difference of
start and end points f General resistance factor
(0,3 4,4)
Capacity in m3/h Diameter of the screw in m Screw
pitch in m Speed of screw in 1/min Fill factor
f0,125 high-density, highly abrasive
material f0,25 high-density, lightly abrasive
material f0,32 low-density, lightly abrasive
material f0,4-0,5 low-density, non-abrasive
material
k factor for inclined screw
inclination
For ribbon screws
k factor
Max. allowed screw speed exists!
12
Screw conveyors
Vertical screws
Minimal required speed of the screw
At critical speed
Above critical speed
13
Roller conveyors
  • Transported material
  • different unit loads, such as
  • boxes
  • paletts
  • long steel or wood material
  • component assemblies

Type of roller elements - Rollers - Wheels
(skates) - Balls
Classification of roller conveyors - Gravity
roller conveyors - Manual roller conveyors -
Powered roller conveyors
14
Gravity and manual roller conveyors
- Gravity and manual roller conveyors
Fixed
Expandable
v
vlimit
Accumulation of the transported unit load
t
15
Powered roller conveyors
Individually-driven rollers
Belt
straight modules only
transport rollers
tensioning rollers
16
Powered roller conveyors
Chain
Round belt
Lineshaft
17
Accessories for horizontal diversion
Pusher
Chain transfer
Sliding shoes
Turntable
Pop-up belt
18
Accessories for vertical diversion
  • Elevator
  • rope
  • belts

non-continuous
Paternoster
continuous
19
Accessories for vertical diversion
Vertical spiral conveyor
Paternoster with sorting function
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