Bucket Elevator

Bucket Elevator

Belt Elevator System is employed as a means of vertically lifting lumpy or granular bulk material over a designedheight. Due to the limitation of the angle of incline in conventional troughed conveyor belt system, Bucket elevator system is used to moving the material vertically. With this system, material is loaded in to buckets fixed along the belt at designed interval.

The selection of the belt for Elevator is based on the capacity, material type and maximum allowable tension. For the fabric reinforced belt, 4 ply, 5 ply and 6 ply constructions are employed to match the tension requirement. The belt type (FBTS) may range from EP500/4 to EP1600/6. The belt joint could be either vulcanized spliced or with mechanical fastener depending on the capacity and the operating temperature. The alternative method is to use the chain (in place of belt) based on heavy duty application and hot material application. The belt does not have any significant wear during the operation thus the cover thickness selection demands no special selection criteria. Typical cover thickness of such belt is 2 mm (or 1.5 mm) on the top (Bucket side) and 3 mm or 4 mm on the bottom (Pulley side).

A typical structure of bucket elevator

Typical Bucket is configuration

Belt elevators are designed to operate on the lower range of the speed starting with 0.5 m/sec to 1.5 m/sec. However, system to handle larger lumps and heavier materials operate on lower speed.

Sizes or shapes of the buckets are standardized on basis of length of projection and with variation to match capacity requirement. Basic material of construction is steel. However, light duty elevators may also use bucket of PU, PVC or such material. Buckets should be spaced at from two to two three times the bucket projection to ensure smooth movement of the material.

Capacity calculation of belt elevator depends upon buckets’ volume, bulk density of the material, belt velocity, bucket spacing and average degree of fill. Such system is used in elevating food material like flour, light granule such as oil seeds, viscous material like cane sugar, wet fine material and soil, heavy pulverized material such as sand, cement and coal.

Bucket Elevator Belts

Recommended minimum pulley diameter for Bucket Elevator Belts

TYPE

DRIVE PULLEY DIAMETER IN MM WITH BELT STRENGTH UTILIZATION OF

TAIL PULLEY DIAMETER IN MM

60-100%

<60%

EP 500/4

500

400

400

EP 630/4

630

500

500

EP 800/4

630

500

500

EP1000/4

800

630

630

EP1250/4

800

630

630

EP 800/5

800

630

630

EP1000/5

800

630

630

EP1250/5

1000

800

800

EP1600/5

1000

800

800

Bucket Elevator Belts

Bucket Elevator Belts

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