Error correcting method for large-scale gantry crane walking

Abstract

The invention discloses an error correcting method for large-scale gantry crane walking, which comprises a control system and an arrangement of a crane on a system, the control system comprises a first test point, a second work station, a reference test point, a wireless signal receiver, a data processing center, a driving control computer, a monitor terminal and a driving frequency converter, the first test point and the second test point are arrange on two side door legs of the gantry crane, a reference work station is provided on the ground, other devices are arranged in a control chamber of the crane. The coordinate position between the position indicator detection moving point and static point can be used, by wireless transmission and computer processing information, the error correcting method enforced by the drive unit of the crane can be controlled, the detection of the displacement by the method is accurate, the accumulative error can be eliminated, the influence of machinery precision and machinery jitter can be overcome, so that the error correcting method has the advantages of proper error correction, stable operation, safety and reliability.

Description

technical field [0001] The invention relates to the safety control in the technical field of large-scale cranes, in particular to a method for correcting the deviation of large-scale gantry cranes when traveling on carts. Background technique [0002] Large-scale gantry cranes are widely used in the shipbuilding industry. In order to adapt to the ever-increasing tonnage of hull segments, the lifting capacity and span of the cranes are also required to be continuously improved. When working, the door legs on both sides of the gantry crane cart carry all the work. The load and the stability of the door legs are the key to ensure the safe operation of the crane. In order to prevent the crane from being unstable during work, it is necessary to limit the synchronization of the movement of the door legs on both sides of the cart. The existing correction devices for large-scale gantry cranes in China are technically The method of rotary encoder and magnetic detection switch is ...

AI Technical Summary

Problems solved by technology

The existing problem is that due to the error of the straightness and levelness of the cart track, the detection wheel with the encoder installed on the traveling mechanism swings or slips left and right, and the magnetic block of the induction magnetic switch is often damaged by the rolling of the vehicle or other heavy objects. The cumulative deviation of the encoder's detection data is too large, which often leads to misoperation or false alarm of the system control

In order to prevent the accumulated deviation of the encoder detection from being too large and not corrected, a detection switch was installed at the flexible winch of the large gantry crane as a double safety protection, but the vibration of the flexible winch of the crane caused the detection switch The action of the collision block is inconsistent with the deflection of the walking mechanism on both sides, which leads to the malfunction of the detection switch, the failure of the detection to cause the gantry crane to stop due to failure, and even the collapse of the gantry crane to cause serious safety accidents that cause machine crashes and fatalities. very heavy loss

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