Portal crane steady state control system

By implementing a real-time monitoring and control system for the gantry crane, issues such as abnormal vibration, broken wire ropes, and wind resistance in the slewing mechanism were resolved, ensuring safe and stable operation of the equipment and improving operational efficiency.

CN122144612APending Publication Date: 2026-06-05DALIAN HUARUI HEAVY IND GRP CO LTD
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Patent Information

Application Number
CN202610440159.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Gantry cranes suffer from abnormal vibrations, broken wire ropes, and wind-resistant adaptive issues in the slewing mechanism during operation, which affect the safety, stability, and operational efficiency of the equipment.

Method used

The system employs a wire rope monitoring unit, vibration monitoring unit, wind power monitoring unit, and self-locking control unit, combined with a PLC control unit, to achieve real-time monitoring and control of the hoisting mechanism, luffing mechanism, slewing mechanism, and trolley mechanism. It uses magnetic flux detection and machine vision recognition methods to determine the degree and location of wire rope breakage, suppress abnormal vibrations, and perform adaptive control of the slewing mechanism.

Benefits of technology

This improves the safety and stability of gantry cranes, avoids equipment accidents caused by strong winds, broken wire ropes, and vibration, and ensures the efficient operation of the equipment.

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Abstract

The invention discloses a gantry crane steady state control system which comprises a steel wire rope monitoring unit, a vibration monitoring unit, a wind power monitoring unit, an absolute value encoder module, a self-locking control unit, a driving unit and a PLC control unit, a first control signal of a hoisting mechanism is generated, and the action of the hoisting mechanism is driven through the driving unit; the control unit is used for controlling the action of a luffing mechanism, a hoisting mechanism, a slewing mechanism or a cart mechanism of the gantry crane through the driving unit when a second control signal for inhibiting or eliminating the abnormal vibration of the key part of the gantry crane structure is generated on the basis of the abnormal vibration degree of the key part of the gantry crane structure; and a third control signal is generated based on comparison of the real-time wind direction angle of the bulk cargo wharf operation environment and the real-time angle, transmitted by the absolute value encoder module, of the slewing mechanism and the real-time wind speed, the driving unit and the self-locking control unit are controlled, and self-adaptive control over the slewing structure of the seat type crane is achieved.
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