Anti-roll control method and device for endless chain hoist lifting device

Abstract

The invention discloses an anti-roll control method for an endless chain hoist lifting device. The anti-roll control method comprises the following specific steps that S1, a detecting device capable of detecting chain links on a chain in real time is arranged on each hoist; S2, after the detecting device detects a corresponding chain link, a pulse signal is transmitted to a main control PLC of a lifting trolley, and after receiving the pulse signal, the main control PLC of the lifting trolley accumulates a value of 1 in a counter corresponding to the detecting device to obtain counting values;S3, one of the counting values is used as a reference value, and the main control PLC of the lifting trolley controls a hoist with the same counting value as the reference value to suspend work and controls a hoist with the counting value not equal to the reference value to continue running; and S4, the steps S2 and S3 are repeated until the corresponding counting values of each hoist are consistent, and the main control PLC of the lifting trolley starts the suspended hoists to enable the hoists to rerun synchronously. The invention also discloses an anti-roll control device for the endless chain hoist lifting device. The anti-roll control device can automatically correct the roll, has high stability and low cost.

Description

technical field [0001] The invention relates to the technical field of hoist hoisting equipment, more specifically, it relates to an anti-rolling control method and device for chain hoist hoisting equipment. Background technique [0002] As a commonly used lifting equipment, the chain hoist is often used on self-conveying trolleys. It uses two or more sets (dock group cranes) to lift items. The chain of the chain hoist is composed of It is composed of chain links arranged vertically and crosswise. When there are 2 or more hoists, it may be affected by some factors (such as the large difference in the load capacity of the hooks on both sides, the difference in the inherent mechanical characteristics of the two hoists, the inconsistency in the response time of the start-stop signal, and mechanical wear and tear. lead to slipping, etc.) will appear out of sync between the hoists. At this time, if the gourd is in the ascending stage, one end of the gourd that runs faster will ...

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of Option 1 is that the micro switch triggered by the steel ball can only send out the switch signal of "rolling has occurred", and the main control PLC of the lifting trolley can only respond to the switch signal to stop all hoist operations, and can only prevent the roll phenomenon further deterioration

Does not tell which side is higher (or lower) and automatically corrects for roll

Moreover, the steel ball sometimes causes false triggering due to the rolling of the steel ball due to the swing of the hanging object.

At the same time, there is usually a long connection line between the cross bar fixed on the spreader and the main control PLC of the hoist trolley (the length is at least the maximum lifting height of the hoist), and this connection line moves up and down with the spreader, which is easy to cause connection problems. The line is broken, the protection fails

[0008] The disadvantage of solution 2 is that the price of the rotary encoder is relatively high, and the value of various interface boards connected with the main control PLC of the lifting trolley even exceeds the value of the chain hoist itself. It can only be used in some occasions that require particularly high synchronous lifting. Other occasions generally do not have this application

Images