Safety precaution method and system for pitching mechanism of stacker-reclaimer

Abstract

The invention discloses a safety precaution method and a system for a pitching mechanism of a stacker-reclaimer. The safety precaution method and the system can skillfully utilize the load characteristics of the pitching mechanism, set limit load parameters based on the load characteristics of each stacker-reclaimer, and alarm when measuring values surpass the limit parameters so as to achieve system precaution. The safety precaution method and the system for the pitching mechanism of the stacker-reclaimer comprise various manually preset parameters of working cylinders connected with the safety precaution system in a programmable logic controller (PLC). The parameters are composed of a cylinder piston diameter, a piston rod diameter, a cylinder output load upper limit alarm threshold, and a cylinder output load lower limit alarm threshold. When a cylinder pressure measuring device detects pressure signals of two working cavities of the cylinder, the pressure signals are delivered to the PLC, the PLC calculates output load of the cylinder and then alarms based on the preset cylinder output load upper limit alarm threshold and the cylinder output load lower limit alarm threshold.

Description

technical field [0001] The invention relates to the technical field of fluid transmission and automatic control, in particular to a safety early warning system of a stacker-reclaimer pitch mechanism using fluid transmission and a control method based on the system. Background technique [0002] Arm type bucket wheel stacker and reclaimer is a large and efficient stacker and reclaimer. It is a track-type loading and unloading machine that uses the bucket wheel to continuously take materials and uses the belt conveyor on the machine to continuously stack materials. It is a special machine for bulk material (bulk) storage yard, which can be combined with unloading (ship) machine, belt conveyor, and ship (vehicle) machine to form a storage yard transport mechanization system. Boom type bucket wheel stacker and reclaimer is composed of bucket wheel mechanism, slewing mechanism, belt conveyor, tail car, pitching and running mechanism. It has the advantages of large stacking ...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned problems existing in the pitching mechanism of the existing stacker-reclaimer in daily use are: 1. Since the protection signal for controlling the pitching mechanism to be in place is sent by the limit switch on site, the working condition of the site installation position of the switch is often poor, and there are often The fall of ore and coal dust, coupled with the sun and rain in the open air, often cause damage to the limit switch or send out false signals and other failures, especially when the pitching mechanism works beyond the stroke and the limit switch cannot accurately send out signals, safety accidents are prone to occur

2. When the load of the pitching mechanism increases and cannot move, it cannot be detected and eliminated in time, resulting in the interruption of the normal production process

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