Monitoring and deviation rectifying system and method for large-span portal crane

Abstract

The invention discloses a monitoring and deviation rectifying system and method for a long-span portal crane, and relates to the technical field of engineering mechanical equipment. The system involves an encoder system, an original vehicle control system and a deviation rectifying control system; the encoder system involves a rigid leg photoelectric encoder and a flexible leg photoelectric encoder, wherein the rigid leg photoelectric encoder is used for calculating the moving distance of a rigid leg of the portal crane, and the flexible leg photoelectric encoder is used for calculating the moving distance of a flexible leg of the portal crane; the original vehicle control system is used for controlling the movement of the rigid leg and the flexible leg; and the deviation rectifying control system is used for driving the original vehicle control system to work so as to carry out movement deviation rectifying on the rigid leg or the flexible leg on the basis of the moving distance, calculated by the rigid leg photoelectric encoder, of the rigid leg and the moving distance, calculated by the flexible leg photoelectric encoder, of the flexible leg when the deviation value between themoving distances of the rigid leg and the flexible leg is greater than a preset threshold value. According to the system and method, the use safety of the portal crane and the operation safety of field workers can be effectively ensured.

Description

technical field [0001] The invention relates to the technical field of construction machinery equipment, in particular to a monitoring and correcting system and method for a large-span gantry crane. Background technique [0002] Large-span gantry cranes have gradually been widely used in engineering construction and other large-scale engineering fields, especially in modern prefabricated component assembly bases, where they are widely used. During the operation of a large-span gantry crane, affected by factors such as different running resistances of outriggers on both sides, wheel slippage, wheel diameter differences, cart track heights, and parallel deviations, the rigid and flexible legs will lose weight after running for a period of time. There is a phenomenon of different speeds. One side of the outrigger is ahead of the other side. When the amount of lead (deflection) exceeds a certain value, the structure of the crane mast may be greatly distorted and deformed, which ...

AI Technical Summary

Problems solved by technology

At present, most of the rigid and flexible leg correction systems of large-span gantry cranes use the correction device of gantry cranes based on PLC (Programmable Logic Controller, programmable logic controller) and frequency converter. In actual work, it is affected by the use environment and other factors. Due to the influence of the auxiliary devices, there will be common problems such as large data errors, untimely deviation correction monitoring, easy damage to the deviation correction system, wrong deviation correction or too frequent deviation correction will affect the normal use of the gantry crane, resulting in the normal use of the deviation correction system in normal production. , is not conducive to ensuring the reasonable correction of the gantry crane in normal use, and cannot guarantee the safety of the gantry crane and the safety of the on-site staff

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