Maritime work arm folding crane rope looseness detecting device

Abstract

The invention provides a maritime work arm folding crane rope looseness detecting device. The detecting device comprises a main arm, a secondary arm, a main winch, a secondary arm pulley set, a PLC unit and a human-computer monitoring interface unit, wherein the secondary arm pulley set includes a pulley, and a sensor for measuring a collecting and releasing state of a steel wire rope on the pulley; the PLC unit is respectively connected with an absolute value encoder and the sensor for judging the state of the steel wire rope between the main winch and the pulley; and the human-computer monitoring interface unit is used for displaying the state of the steel wire rope. The detecting device can accurately obtain the looseness state information of the arm folding crane steel wire rope, reduces the wear of the steel wire rope due to mutual twisting, prevents engineering accidents, and guarantees the maritime work arm folding crane wave compensation precision.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a detection device for a loose rope of a marine folding-arm type crane. Background technique [0002] At present, knuckle-arm cranes are widely used in marine engineering, especially in deep-sea pipeline construction and resource extraction. During the normal lifting operation of the crane, the goods will move up and down due to the action of waves, which will cause the wire rope between the winch on the crane and the fixed pulley to loosen, and the wire rope will easily elongate, sag and vibrate. In the case of slack wire rope, there will be an error between the displacement of the wire rope measured by the winch encoder and the displacement of the actual wire rope hook end, which will result in a decrease in the accuracy of the winch wave compensation, and may also cause disorder in the arrangement of the wire rope in the winch 1. The steel wire ropes are intertwined, which leads to seri...

AI Technical Summary

Problems solved by technology

During the normal lifting operation of the crane, the goods will move up and down due to the action of waves, which will cause the wire rope between the winch on the crane and the fixed pulley to loosen, and the wire rope will easily elongate, sag and vibrate

In the case of slack wire rope, there will be an error between the displacement of the wire rope measured by the winch encoder and the displacement of the actual wire rope hook end, which will result in a decrease in the accuracy of the winch wave compensation, and may also cause disorder in the arrangement of the wire rope in the winch , The wire ropes are intertwined, which will lead to serious wear and tear of the wire rope and shorten the service life. In severe cases, the wire rope may be separated from the bracket, resulting in accidents

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