MULTIDOS Weighfeeder

MultidosWeighfeeder1

  • - Weighfeeder for bulk solids of most diverse properties
  • - Wide performance range
  • - MechaTronic design with integrated electronics 
  • - Safe belt run monitoring and tracking 
  • - Easy belt change without auxiliaries

 

Application

Schenck weighfeeders are used for continuous gravimetric feeding of bulk solids. Their rugged design makes them suitable for the harsh demands of industrial operation in
the rock, sand & gravel, metal and basic material, chemical and animals feed industries.

Application oriented types and the high quality standard of the Schenck weighfeeders ensure economical solutions even to highly sophisticated feeding tasks. The first-class measuring, control, and supervisory electronics enables comprehensive monitoring of weighfeeders.

The MechaTronic variant permits easy integration into plant control at a very reasonable price.

This results in:

  •  – Minimal investment and sequential costs (operating and maintenance costs)
  •  – Little installation effort and low space requirements
  •  – Improved accuracy and quality of the final product.

 

Construction

The weighfeeder standard equipment comprises:

  •  – Rugged feeder mechanics
  • - Automatic belt tracking
  • - Plough scraper (diverting foreign objects on return belt to the side)
  • - Belt outside scraper
  • - Static belt tension through takeup screws integrated in frame
  • - Belt influence compensation (BIC).

For the many and varied applications, the following accessories are available:

  • - Dust-tight enclosure of varying extent:

– Discharge hood

– Belt cover

– Rear enclosure

– Complete enclosure

  • - Integral chain conveyor for cleaning of mounting surface.

 

Operating Principal

Designed for continuous feeding as well as for the batching of bulk solids, the MULTIDOS weighfeeder consists of

  •  – Belt conveyor
  • - Drive with speed transducer for belt speed acquisition
  • - Material prefeeder, e.g. hopper with bed depth setter
  • - Integrated belt scale, and
  • - Measuring and control electronics.

The electronic measuring and control system is designed to determine feed rate m (kg/hr) multiplication of belt load q (kg/m) and belt speed v (m/s), and to keep the preset feed rate value constant with the use of a closedloop control.
For weighfeeder function and accuracy, the belt scale assembly is of central importance.

The SCHENCK weighfeeders use electronic single-idler belt scales. One idler is acquired by two hermetically sealed, stainless strain-gauge load cells. The weighing electronics measures the resulting force G of the material located on the above belt section between the two opposed carrying idlers.

Belt load q results from the quotient from force G and the distance between the two idlers, i.e. weigh span L. Feed rate is computed from value q multiplied by the belt speed. Feed rate totalization over the time finally supplies the amount fed out. The belt influence is considered with the aid of the belt influence compensation (BIC).

The infeed hopper is an essential prerequisite for the reliable operation of the weighfeeder. Various types can be selected in accordance with material properties:

  •  – Feed hoppers mechanically designed for specific materials
  • - Vibrating feed hoppers for bridging materials
  • - Settling chambers for fluidizable material

Variants

  •  – Dimensions

The Belt widths / mm: 650, 800, 1000, 1200, 1400
Distance pulley to pulley / mm: 1500, 2000, 2700, 3500, 4000, 5000, 6000, 7000, 8000

  •  – Dust-tight enclosure

MultidosFeeder2

MultidosFeeder3

 

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