Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive
Patent
1996-10-22
1998-08-04
Recla, Henry J.
Fluent material handling, with receiver or receiver coacting mea
Automatic control of flow cutoff or diversion
Level or overflow responsive
141 67, 141 94, 141192, 141196, 222 59, 222 64, B65B 130, B65B 328, B65B 5706, B65B 5714
Patent
active
057879435
DESCRIPTION:
BRIEF SUMMARY
The invention refers to a procedure for the dosed filling of free-flowing media into containers in which the time for filling the volume of a filling pipe is measured and in which the set comparison brings this time into a determined time relation with the volume of a vessel to be filled. For this purpose, the time for filling the filling pipe is divided into time units, commencing with the start of the filling and finishing with the emergence of the medium from the filling pipe. The basis for filling the volume of the filling pipe is maintained constant by the overflow arrangement of a leveling container. The viscosity adjustment is carried out separately outside of the filling pipe. The invention furthermore provides a device for implementing the procedure.
DD PS 297 123 shows that the base for filling the volume of the filling pipe of a flow-controlled filling machine for products of any viscosity is kept constant by the overflow arrangement of a leveling container. For this purpose, a filling machine is designed in such a way that the filling pipe emerges from a buffer container in which a leveling container is arranged and in which the filling pipe connected to a pump ends in a filling medium bath. The leveling container contains a mutual filling medium bath maintained in a continuous circuit due to continuous overflowing of the filling medium from the leveling container. At the rising end of the filling pipe, a barrier consisting of sensors is formed which is connected by a control signal to a control device, which in turn is connected to a pump via an output signal provided and amplified before a switching amplifier. Via a control signal, the control device is in operative connection with a position transmitter. The known procedure and the device have the disadvantage that dosing is volume-dependent. This requires a readjustment of the equipment during the filling process, in particular in case of viscosity deviations and varying densities of the filling medium. Furthermore it should be pointed out that inaccuracies of the dosed volume are or disadvantage due to the idling times of the volume control.
The invention thus has the task of providing a procedure and a device according to the characterizing clauses of claims 1 and 4, enabling an exact, automatically controlled dosing of free-flowing media into respective containers.
According to the invention, the task for a generic procedure is solved by the characterizing features of claim 1 and for a generic device implementing the procedure by the characterizing features of claim 4.
After switching the filling pump off, the filled vessel moves on and the time-controlled filling process in the filling cycle starts again. It is a characteristic of the inventive procedure that the total filling time--t.sub.n --is determined in corporation with the factors of opening of the filling pipe ##EQU1##
A further advantageous characteristic of the inventive solution is that the flow speed Qv in the filling pipe is measured by an analogue speed sensor. Upon reaching the sensor arranged at the outlet opening, the filling time is started and is, in context with the now constant flow speed Qv and the constant volume of the filling medium, finished once the container has been filled. In an embodiment of the inventive solution, a filling pipe always filled to the same level with filling medium is arranged on the leveling container connected to a filling pump. The filling pipe contains a flow sensor arranged directly above the level of the filling medium in the leveling container and is connected to an SPS-type time control. The time control contains the set value of the flow speed of the filling medium. By using a constant comparison of the set and actual values of the flow speeds, the actual speed is adapted to the set value size. This adaptation is carried out by changing the pump speed, giving off a different volume and consequently readjusting the flow speed of the filling medium whilst maintaining the constant conditions such as the same cross section of the filli
REFERENCES:
patent: 5316444 (1994-05-01), Wicnienski
Afuema Abfuellmaschinen GmbH Rosslau
Maust Timothy L.
Recla Henry J.
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