An early warning method for preventing the horizontal wheels of the main trolley of a ship unloader from falling off

Abstract

The invention relates to a falling-prevention early warning system and method for horizontal wheels of a main trolley of a ship unloader. By adoption of the falling-prevention early warning system and method for the horizontal wheels of the main trolley of the ship unloader, the technical problems that in the high-speed traveling process, the faults that bearings of the horizontal wheels are damaged, and the horizontal wheels fall and gnaw a rail can occur are mainly solved. According to the technical scheme of the falling-prevention early warning system for the horizontal wheels, two proximity switches are symmetrically arranged on the inner sides of a double-rail base plate for the main trolley correspondingly, and the signal output ends of the proximity switches are connected to a PLC system of the ship unloader; a trolley zero-meter position reference signal switch is mounted on the upstream rail beam side of a zero-meter position line of the main trolley, an incremental encoder is mounted on a tail shaft of a motor of the main trolley, the signal output end of the trolley zero-meter position reference signal switch and the signal output end of the incremental encoder are connected to the PLC system of the ship unloader, and the trolley zero-meter position reference signal switch and the incremental encoder are used for datum calibration of the position of the main trolley, so that the traveling positions of the main trolley are recorded by a PLC in the traveling process of the main trolley; and when actuating signals are sent out by the proximity switches, an alarm sound signal and an image-text warning message are sent to a monitoring touch screen in a driver cab of the ship unloder after the actuating signals are processed by the PLC, and meanwhile, the main trolley is controlled to operate at a low speed. The device and method are used for falling protection of the horizontal wheels of the main trolley of the bridge grab ship unloader.

Description

technical field [0001] The invention relates to an early warning system and method for preventing the falling off of the horizontal wheel of the main trolley of a ship unloader, and is a device and method for preventing falling off of the horizontal wheel of the main trolley of a bridge-type grab ship unloader. Background technique [0002] The existing 1200t / h bridge grab ship unloader operating mechanism includes hoisting, opening and closing mechanism, cart traveling mechanism, pitching mechanism, trolley operating mechanism, wire rope winding system, unloading system, etc. The running mechanism of the trolley is mainly composed of a car body, a horizontal wheel, an idler, and a pulley block. The trolley is driven by a wire rope, and the wire rope is a hoisting, opening and closing wire rope. During the operation, the main trolley can move forward and backward by the synchronous operation of the lifting, opening and closing of the wire rope drum, and the winding / release ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an early warning system and method for preventing the horizontal wheel of the main trolley of the ship unloader, which mainly solves the technical problems of damage to the horizontal wheel bearing, falling off of the horizontal wheel, and rail gnawing when running at high speed.

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