Control system and control method for rotary car dumpers
AssigneeVale S.A.
InventorsBruno Eduardo Lopes, Celson José De Resende Neto, Waldinir Lima Castro Silva
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Abstract
This invention relates to a control system and method for rotary car dumpers comprising a positioning car, silos and feeders. Such control system comprises three integrated and communicating controls in closed grid, that is, the positioning car control, the silos level control and the feeder flow control. In this way, with the data of these controls, the rotary car dumpers control system is configured to maintain the level of silo at maximum, performing changes in the cycle time by controlling the positioning car to maintain the level of silos and thus achieve maximum productivity of the equipment.
Claims19
A method of operating a rotary car dumper, comprising:
- a) determining a silo level of at least one silo of at least one feeder by a silo level control to be at a first level or a second level;
- and
- b) adjusting the silo level, when the silo level is determined to be at:
- a first level, by increasing a cycle time of a discharge of material by a positioning car control;
- a second level, by:
- measuring a current, torque, position, speed, and acceleration of a positioning car by a positioning car control and verifying whether the cycle time can be decreased by increasing forces of the positioning car;
- decreasing the cycle time based on the positioning car control determining that the cycle time can be reduced;
- and
- decreasing an output flow of the material from the at least one feeder by a feeder flow control based on the positioning car control determining that the cycle time cannot be reduced;
- wherein the second level is determined by measuring the silo level that is less than the first level and less than a minimal level, wherein the minimal level is less than the first level and greater than the second level;
- and
- c) repeating a) and b) to maintain the silo level at the minimal level, calculated by flow set point.
Dependencies are inferred from the claim text.