Material-loading trolley slipping index automatic protective device and protective method of blast furnace winch

Abstract

The invention provides a material-loading trolley slipping index automatic protective device of a blast furnace winch. The material-loading trolley slipping index automatic protective device comprises a trolley slipping protecting device, wherein the trolley slipping protecting device comprises a position encoder, a winch frequency converter and a PLC. The position encoder is connected with a pulse encoder interface of a CUVC plate of the winch frequency converter, an output interface of the CUVC plate of the winch frequency converter is connected with a PLC input interface, original manual adjustment of the material-loading trolley parking position is changed into full-automatic adjustment through the added trolley slipping protecting device, the automation degree and the control accuracy of a winch system are improved, and the winch system fault rate is reduced. The problem that a material-loading trolley cannot automatically control the tightness of an internal contracting brake device is effectively solved, and the problem of blast furnace damping down caused by material-loading faults is solved. The material-loading trolley can continuously perform material loading, the system tends to stability, the molten iron yield and the quality of the same type iron are improved, the blast furnace situation is stabilized, and certain economic benefit is further increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an index braking protection device and a protection method for a blast furnace hoisting and loading trolley walking car. Background technique [0002] The original blast furnace hoisting system does not have a walking car index protection system for the loading trolley. During the loading process, the hoisting motor will pull the trolley up and down according to the settings of the inverter system parameters, and stop the trolley at a fixed position. However, due to the looseness of the brake device of the winch motor after a period of use, the problem that the brake device cannot hold the trolley often occurs, and it is necessary to contact the electrician on duty to deal with it. This situation will not only affect the normal progress of feeding, but also cannot carry out automatic control and adjustment, and cannot solve the problem before the failure occurs, resulting in g...

AI Technical Summary

Problems solved by technology

[0005] An automatic protection method for the walking index of the blast furnace hoisting and loading trolley. Considering that the braking system is unstable and often occurs that the braking system is too loose and the trolley continues to slide beyond the designated area, the sliding index (sliding index) is innovatively increased. It is a symbol used to show the tightness of the brake), calculate the actual distance according to the code value of the displacement encoder of the winch motor when it is running and when it is stopped, determine the average distance and leave a margin of ±0.3 meters to determine the maximum parking distance Protection value: connect the maximum protection value to the control system through PLC, and according to the alarm function on the monitoring system, when the car runs beyond the parking point, an alarm will appear on the screen, and the specific exceeding distance will be displayed, and the corresponding alarm will be automatically made through the walking index Adjustment, the tightness of the brake can be adjusted to the best position

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