Material or article handling – With weighing
Patent
1998-01-02
1999-07-27
Bucci, David A.
Material or article handling
With weighing
177119, 414327, G01G 1100
Patent
active
059279249
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a hopper discharging and charging plate conveyor with automatic weighing and apportioning device for bulk materials, the plate elements of the plate conveyor being coupled in a tension-resistant manner to at least one driven, endless drawing element deflected via drive and deflection wheels and, in the conveying, top strand, being supported with rolling action on running rails by means of running rollers arranged on the underside of said plate elements, and there being arranged on the conveying path of the plate conveyor a weighing station, at which the running rails form a weighing bridge which bears on electrical force-measuring devices and, during conveying operation, measures the bearing weight of the loaded plate elements running over it.
PRIOR ART
Hopper discharging conveyors of this type, with the aid of which even those types of bulk materials which are difficult to convey, e.g. tend to stick together, are extracted from hoppers and fed, as far as possible in apportioned quantities, to downstream installations, are known. They are designed such that the plate conveyor extracts the bulk material in a fixed layer height from the hopper and conveys it into the region of the weighing station. The forces arising here from the weight of the plate elements and the bulk material resting thereon are transferred at the weighing station, via running rollers, onto the running rails, which are designed as a weighing bridge and bear on electrical load cells. A tachometer is used to obtain an electrical quantity which is proportional to the speed of the plate conveyor and is multiplied with the weighing results, i.e. with the bearing pressures sensed in the load cells, to give an electrical reproduction of the conveying stream (conveying output) at any one time, the conveying streams at any one time being used to calculate, by electrical integration, the quantity of bulk material conveyed. The electrical quantities are processed by means of an electronic evaluation unit, with the aid of which the bulk materials can thus be apportioned. The weighing bridge essentially comprises two running rail sections which, for example with the aid of links, are displaced in a torque-free manner on electrical load cells which are arranged therebeneath and deliver the weighing result is in the form of electrical quantities. Via the controlled or regulated conveying speeds of the plate conveyer and/or the loading or layer height of the bulk material thereon, it is possible to apportion the bulk material.
The abovementioned hopper discharging plate conveyor has the advantage that, with the integration of the weighing station within the plate conveyor, it is possible to dispense with weighing belts, which are situated downstream of the hopper discharging system, are designed as belt conveyors and work with comparatively high measurement accuracy. However, the weighing accuracy of the plate conveyors equipped with the weighing bridges is beset with sources of error since the horizontal tensile forces of the endless drawing elements of the conveyor, said elements being connected to the plate elements and comprising flat-link chains for example, have a disruptive influence on the vertical forces (bearing weight) which are to be measured at the weighing station. In order to remedy this, it has been common practice to suspend the plate conveyor with its bulk-material charging point in a vertically adjustable manner and to arrange on the suspended formation the load cell which is used for weighing purposes. This arrangement results in increased structural outlay.
DESCRIPTION OF THE INVENTION
The object of the invention is to configure an apparatus of the type mentioned in the introduction with a comparatively low degree of outlay such that the disruptive influences which result from the tensile forces of the driven drawing element or elements (chain belts) and falsify the weighing results can be eliminated and, accordingly, the apparatus can be operated with considerably improved measuremen
REFERENCES:
patent: 1953388 (1934-04-01), Bettin
patent: 2758696 (1956-08-01), Eyler
patent: 2830803 (1958-04-01), Doyle
patent: 2844243 (1958-07-01), Christiansen et al.
patent: 3497084 (1970-02-01), Murrah
patent: 4114708 (1978-09-01), Saner
patent: 4420051 (1983-12-01), Furuta et al.
patent: 4729442 (1988-03-01), Sichet
patent: 4741431 (1988-05-01), Whitehead
patent: 5044819 (1991-09-01), Kilheffer et al.
patent: 5413451 (1995-05-01), Pellegrino
patent: 5547034 (1996-08-01), Werz et al.
Kemmer Friedrich
Schnelle Hendrik
Ulzhofer Adolf
Bucci David A.
Maschinenfabrik Besta GmbH & Co.
LandOfFree
Silo removal and discharge plate conveyer with automatic bulk ma does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Silo removal and discharge plate conveyer with automatic bulk ma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silo removal and discharge plate conveyer with automatic bulk ma will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-871093