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US 12,601,627 B2Granted
Metering device
AssigneeQlar Europe GmbH
InventorsFrank Wucher, Bernd Allenberg
Life of this patent
Estimating the term…
Abstract
A metering device for discharging bulk material at a discharge opening, with a hopper for storing the bulk material, and a conveying device for conveying the bulk material from the hopper to the discharge opening. The hopper has an outlet opening through which the bulk material can be conveyed out of the hopper by the conveying device, and a slide gate, the position of which determines an outlet cross-section of the outlet opening. The metering device has a motor-operated actuator for adjusting the outlet cross-section, a control device for controlling the metering device and a motor-operated actuator for adjusting the slide gate, which is controlled via the control device as a function of a target feed rate.
Claims9
A metering device comprising:
- a hopper to store bulk material, the hopper having an outlet opening through which the bulk material is adapted to be conveyed from the hopper;
- a slide gate, a position of the slide gate determining an outlet cross-section of the outlet opening of the hopper;
- a discharge opening to discharge the bulk material from the metering device;
- a conveying device to convey the bulk material from the outlet opening of the hopper to the discharge opening;
- a control device to control the metering device;
- and
- a motor-operated actuator to adjust the slide gate,
- wherein a position of the slide gate and the outlet cross-section are automatically controlled via the control device as a function of a target feed rate, such that a dumping height of the bulk material being conveyed on the conveying device is changeable during operation of the metering device by mechanically adjusting the outlet cross-section.
5 more elements
A metering device comprising:
- a hopper to store bulk material, the hopper having an outlet opening through which the bulk material is adapted to be conveyed from the hopper;
- a slide gate, a position of the slide gate determining an outlet cross-section of the outlet opening of the hopper;
- a discharge opening to discharge the bulk material from the metering device;
- a conveying device to convey the bulk material from the outlet opening of the hopper to the discharge opening;
- a control device to control the metering device;
- and
- a motor-operated actuator to adjust the slide gate, the motor-operated actuator being controlled via the control device as a function of a target feed rate,
- wherein the control device has a feed rate control loop with a first controller, wherein the first controller controls a feed rate using a conveying velocity of the conveying device as a control variable, and wherein the control device is configured to control the outlet cross-section via the feed rate based on a feed rate-outlet cross-section characteristic curve, the characteristic curve being described by an analytical equation or is defined by vertices, and the characteristic curve being monotonically ascending between a minimum cross-section and a maximum cross-section, and
- wherein the control device has a filter which is configured to smooth out a signal for the feed rate as an input variable for the control of the outlet cross-section.
6 more elements
A metering device comprising:
- a hopper to store bulk material, the hopper having an outlet opening through which the bulk material is adapted to be conveyed from the hopper;
- a slide gate, a position of the slide gate determining an outlet cross-section of the outlet opening of the hopper;
- a discharge opening to discharge the bulk material from the metering device;
- a conveying device to convey the bulk material from the outlet opening of the hopper to the discharge opening;
- a control device to control the metering device;
- and
- a motor-operated actuator to adjust the slide gate, the motor-operated actuator being controlled via the control device as a function of a target feed rate,
- wherein the control device has a feed rate control loop with a first controller, wherein the first controller controls a feed rate using a conveying velocity of the conveying device as a control variable, and wherein the control device is configured to control the outlet cross-section via the feed rate based on a feed rate-outlet cross-section characteristic curve, the characteristic curve being described by an analytical equation or is defined by vertices, and the characteristic curve being monotonically ascending between a minimum cross-section and a maximum cross-section, and
- wherein the control device has a conveying velocity control loop with a second controller, wherein the second controller further controls the conveying velocity using an actual outlet cross-section as a control variable.
6 more elements
A metering device comprising:
- a hopper to store bulk material, the hopper having an outlet opening through which the bulk material is adapted to be conveyed from the hopper;
- a slide gate, a position of the slide gate determining an outlet cross-section of the outlet opening of the hopper;
- a discharge opening to discharge the bulk material from the metering device;
- a conveying device to convey the bulk material from the outlet opening of the hopper to the discharge opening;
- a control device to control the metering device;
- and
- a motor-operated actuator to adjust the slide gate, the motor-operated actuator being controlled via the control device as a function of a target feed rate,
- wherein the control device has a feed rate control loop with a first controller, wherein the first controller controls a feed rate using a conveying velocity of the conveying device as a control variable, and wherein the control device is configured to control the outlet cross-section via the feed rate based on a feed rate-outlet cross-section characteristic curve, the characteristic curve being described by an analytical equation or is defined by vertices, and the characteristic curve being monotonically ascending between a minimum cross-section and a maximum cross-section, and
- wherein the control device has a vibration analyzer and a vibration control element to avoid vibrations of the conveying velocity, wherein the vibration analyzer is configured to detect vibrations of the conveying velocity and the vibration control element is configured to change the outlet cross-section by a predetermined or random amount when the vibrations of the conveying velocity are detected.
6 more elements
Dependencies are inferred from the claim text.