Belt Weight Doser

DL-11

Belt Weight Doser DL-11

Purpose

Belt weight doser DL-11 is designed for continuous dynamic weighing and dosing of bulk materials in various industries including ferrous and non-ferrous metallurgy, food industry and construction.

The doser is used both as a standalone device and as part of complex weighing-dosing systems.

Equipped with belt deviation limiters, automatic device guiding belt movement and sensors for doser shutdown when belt deviates.
To ensure belt tension stability, an automatic tensioning device is provided.

Functions

Material supply with specified productivity
Accounting for dosed material consumption by cumulative total
Conveyor belt speed measurement
Measurement and indication of dosing parameters (total, mass, speed; current and set productivity)
Processing input signals and forming control actions on electric drive
Formation of current signal proportional to current productivity (0-20 mA or 4-20 mA, selectable by software)
Control and signaling of emergency situations (due to belt deviation, doser stop, absence of material on belt, electric drive current protection activation)
Local/remote setting of productivity values
Possibility of information output to upper level computer via RS-485
Possibility of discrete output signals for adjacent equipment blocking

Technical Specifications

1
Maximum capacity limit (MCL)
up to 10000 t/h
2
Permissible dosing error
±0.5%
3
Motor control
frequency converter
4
Operating mode
continuous
5
AC power supply:
- для блока обработки сигналов:
voltage
(220 +22 -33) V
frequency
(50±1) Hz
- для электропривода:
voltage
3 × 380 V
frequency
(50±1) Hz
6
Operating conditions:
6.1
Ambient air temperature
from minus 20 to 60 °C
6.2
Dosed material temperature
up to 180 °C
7
Configuration
single-unit, without loading device
8
Belt width
400 ÷ 3000 mm
9
Full average service life
15 years

Doser control system operating modes

Automatic (regulated)
Continuous dosing
Manual (indicating)
Continuous weighing
Calibration
With unloaded moving belt

Product composition

1
Short-base weight conveyor
1
2
Frequency-controlled gear motor
1
3
Strain gauge force sensor ('HBM' PW10C3)
2
4
Belt speed sensor
1
5
Microprocessor signal processing unit
1
6
Control cabinet
1
7
Setpoint device ('MIKROL' BRU-7)
1
8
Operational documentation, set
1

Delivery set is agreed with the Customer and produced according to the initial data of the questionnaire reflected in the technical specification when concluding the contract.

Annual operational requirements

Weekly inspection and cleaning from debris
Calibration once a year