Views: 0 Author: Site Editor Publish Time: 2020-12-16 Origin: Site
Usually during operations at container terminals, quay cranesspreaderThe hoisting operation needs to be carried out according to the set time. After the operation is completed, when the spreader is empty, the hook will rise to a position greater than 30 meters. At this time, the signal of the spreader will appear abnormal. At this time The indication of the spreader interlock detection failure will appear on the GP alarm screen in the quayside crane control area. This performance is the main manifestation of the electrical failure of the quayside crane spreader vertical cable.
This fault is mainly reflected in the abnormal lifting speed, abnormal execution of the spreader and abnormality of the relevant indicator lights in the spreader, especially the abnormality of the unlocking light.
In the process of troubleshooting, the first thing to do is to put the spreader in a bypass state, and then put the spreader on the ground to detect and repair the fault.During the maintenance of the spreader, the communication capability of the spreader communication module must be tested. Usually the burnout phenomenon of the communication module is more obvious. The burnout of the communication module will affect the lightning protection equipment of the console and other equipment.
If the controller itself is not affected in this case, neither will the power adapter since it is in AC mode.Then the fault is generally caused by the communication system.This is because if the voltage value in the communication system is greater than the normal voltage value of the DC power supply, the communication module will be burned directly.
After detecting the fault, maintenance personnel must close the quay crane according to standard operating procedures to continue to detect possible faults.After shutting down the operation of the quay crane, maintenance personnel must test the voltage and power supply of the spreader incoming line.During this process, if the voltage value of the spreader is within the normal range when it is on the ground, the lightning protection equipment will be damaged.Then further examination of other causes is required.
At this time, maintenance personnel need to check the fault on the spreader.Because the detection of this part requires the spreader to be in a non-stationary state.Therefore, it is necessary to ensure the safety of maintenance personnel.This requires taking some protective measures for maintenance.During maintenance, the height of the spreader and the speed of lifting should be balanced.In this way, the incoming power supply on the spreader frame can be better inspected.