Blast furnace skip car anti-top-rushing intelligent monitoring method

Abstract

The invention discloses a blast furnace skip car anti-top-rushing intelligent monitoring method which comprises the steps: a controller is connected into a winch dragging system, and the controller displays the running time, the theoretical position and the actual rotating speed of a skip car in real time and judges whether a deceleration position signal from a master command is received or not; when dangers occur, a frequency converter is controlled to perform corresponding protection actions according to the designed danger grades; and when a fault occurs, an alarm is given in time, data canbe recorded and queried, a fault link is determined according to the occurring fault, and a basis is provided for taking measures in the next step. The anti-top-rushing function of the feeding skip car can be achieved, and maintenance personnel can analyze reasons and troubleshoot hidden dangers greatly and conveniently.

Description

technical field [0001] The invention belongs to the field of automation control, and relates to an automation control method, in particular to an intelligent monitoring method for blast furnace bunker car topping prevention. Background technique [0002] Blast furnaces in iron and steel metallurgical enterprises are used for iron ore smelting operations. In this process, iron ore and other raw materials need to be transported from the raw material warehouse to the receiving hopper on the top of the blast furnace, and then put into the furnace for smelting. [0003] At present, there are generally two ways to transport iron ore and other raw materials to the receiving hopper: one is to use a belt to send to the blast furnace receiving hopper, and the other is to use a feeding trolley to send it to the blast furnace receiving hopper. [0004] When the feeding trolley is used, it needs to be equipped with a hoisting and dragging system. The hoisting motor drives 2 feeding troll...

AI Technical Summary

Problems solved by technology

[0009] The frequency converter (also in the form of rectification + inverter) will also generate various harmonics when it is working, and the radiated power is relatively large (the rated power of the frequency converter is generally above 315 kilowatts), which will also affect the winch. system that adversely affects signal transmission

Once the winch control PLC fails to detect the position signal of the feeder truck, or the control signal to the inverter is interrupted, it will cause the situation that the parking cannot be stopped as required, and eventually the feeder truck rushes to the furnace roof at high speed, resulting in a "top rush" accident

The "topping" of the feeder truck may cause derailment at the slightest level, or collide with other equipment on the furnace roof at worst. In either case, it will lead to shutdown of production, time-consuming and labor-intensive repairs, and large economic losses.

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