DE29620332U1 - Dosing conveyor - Google Patents

Description

File: Musters.,

Utility model application for new dosing conveyor optionally with drainage device and/or weighing system

Fields of the invention:

Dosing system for bulk materials (as a discharge device for bulk materials from silos, containers, stockpiles or direct fill). Optionally with drainage device for drainage of moist and wet bulk materials and/or integrated weighing system for direct, highly accurate weight determination as a performance value in tonnes or kg/hour.

State of the art before:

Bulk material is discharged via vibrating chutes, dosing belts, dosing screws, dosing locks and slides etc. Vibrating chutes have a small control range; dosing belts have high wear on the belt when handling coarse bulk material; dosing screws, locks and slides have a small control range, especially when handling coarse bulk material.

The quantity measurement and control of bulk material flows is carried out continuously via scales without a separate weighing table, so that external influences can affect the measurement accuracy.

Problems underlying the invention:

Dosing conveyors for coarse bulk material should discharge and regulate material flows with a large performance and control range with the lowest possible drive power and with the lowest possible wear.

The scraper floor should optionally be equipped with slotted screens to ensure optimum drainage of the bulk material.

The newly developed dosing conveyor can be optionally designed with a weighing table after the inlet neck. The weighing table enables highly accurate , continuous and gravimetric measurement of the material flow in kg/h during conveying. The material flow can be continuously regulated at any output. This results in a much more accurate dosing conveyor scale!

Concrete inventive solution:

Stepless control range with minimal wear through the use of roller chains a) that are guided outside the material flow b). The material is discharged via scraper conveyors c) that are connected outside the material flow b) to the transport roller chain a) by carriers d). Material guides e) within the drive chains ensure minimal wear and a long service life of the drive chains a).
Low drive power f), because chains are guided outside the material flow!

Optionally with drainage device for bulk material:

Optimum dewatering of the bulk material through large-area slotted screens g) in the scraper floor b).

Optionally with integrated weighing table as dosing conveyor scale:

The carriers are connected to the transport roller chain outside the material flow and pull the material flow from the solid base or a fixed table h) over the weighing table i), which is then located separately. The load is determined with high precision on the separate weighing table i), which rests on one or more load cells j). This is possible because the table i) is mounted as a platform scale "force shunt-free" and the bulk material does not transfer any undefined forces from the solid base or fixed table to the weighing table. The entire quantity on the weighing table is recorded in each case!

The speed of the material flow is measured by a speedometer k) on the drive or deflection shaft.
Both values (force and speed) are multiplied in the connected scale computer 1) and result in the exact conveying capacity in kg per unit of time.

Furthermore, by adjusting the speed of the drive motor f) different, desired conveying capacities can be achieved (dosing conveyor scale).

This results in a dosing conveyor for desired, controlled mass flows in kg per unit of time in that an electronic controller m) after determining the force and speed compares the current conveying capacity in kg per unit of time with the desired or preselected capacity in kg per unit of time, and tracks and adjusts the current capacity to the desired capacity by changing the speed.

Claims (1)

"Dosing conveyor ·· .· . Technically new features are: 1. Drainage system characterized in that through large-area slotted sieves in the scraper floor When the machine is idle and pumped, water is pumped out of the material is drained off (into collecting tanks); Low-wear transport characterized by the fact that through outside the material flow (lateral) Guided roller chains with carriers the material transport is effected, especially because the transport chain with the goods does not come into contact; Dosing scale for Highly accurate instant weighing during transport marked by integrated weighing table separated from the transport table or other transport surface, which allows immediate, highly accurate weighing of the transported material without the influence of transport forces, in particular by determining the load flows in mass per unit of time.