Overload lowering prevention monitoring system of main shaft friction type hoister

Abstract

The invention discloses an overload lowering prevention monitoring system of a main shaft friction type hoister. The system consists of a main shaft loading monitoring center, a main shaft unloading monitoring center and a main shaft hoister room monitoring center; the main shaft loading monitoring center comprises an S7-300 programmable controller, a quantitative hopper control button, a quantitative hopper fan-shaped door opening sensor, a quantitative hopper fan-shaped door closing sensor, a quantitative hopper weighing sensor and a quantitative hopper fan-shaped gate switching electromagnetic valve; the main shaft unloading monitoring center comprises an S7-300 programmable controller, a skip in-place detection switch, a skip over-winding detection switch, an internal skip coal position detection sensor and a skip flat gate switching electromagnetic valve; and the main shaft hoister room monitoring center comprises an S7-300 programmable controller, a communication interface and an execution circuit. The system monitors the full-stroke hoisting moment of a definite weight loading hoister skip and monitors and compares the loading and unloading weights so as to ensure that the overload skip keeps enough hoisting moment or braking moment all the time without full unloading and avoid overload lowering accidents of the hoister skip.

Description

technical field [0001] The invention belongs to the field of mine electrical technology, and relates to avoiding repeated loading of skips of the friction hoist of the main shaft and heavy load of the friction hoist of the main shaft during the process of lifting the beneficial mineral products of coal mined underground by a friction hoist in a main shaft of a coal mine The technology for lowering heavy loads of skips during hoisting, in particular relates to a monitoring system for preventing heavy loads lowering of main shaft friction hoists. Background technique [0002] The present invention introduces the background technology by taking flat gate skip, AC winding motor series resistance speed regulation, and low frequency power supply electric braking main shaft friction hoist as examples. [0003] Large and medium-sized mines at home and abroad are designed with a main and auxiliary shaft hoisting system. The auxiliary shaft hoisting system is used to lift various mate...

AI Technical Summary

Problems solved by technology

[0007] In order to completely solve the above potential hidden dangers, the present invention takes fundamental measures from the technical support to overcome the shortcomings of the above control methods, and provides a main shaft friction hoist anti-heavy load lowering monitoring system

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