Crane early warning system

Abstract

The invention discloses an overhead crane pre-warning system. The overhead crane pre-warning system comprises a track deformation detection system, a cross beam deformation detection system, a hoisting height pre-warning system, a brake effect detection system, a controller and a feedback device. The track deformation detection system comprises paired laser range finders and a light reflecting layer. The cross beam deformation detection system comprises multiple inclinometers arranged on an overhead crane cross beam. The hoisting height pre-warning system and the brake effect detection system comprise multiple encoders. By means of the overhead crane pre-warning system, automatic judgment and automatic pre-warning of track deformation are achieved; when the real-time deformation amount exceeds the allowable deformation limit of the cross beam, prewarning is conducted in advance for reminding through the feedback device; traveling safety and production safety of an overhead crane are effectively improved; meanwhile, the service life of the overhead crane is prolonged; and the hoisting height of the overhead crane can be prewarned in real time, and the brake effect can be detected and prewarned.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a crane early warning system. Background technique [0002] The bridge frame (cart) of the crane (overhead crane) runs longitudinally along the rails (cart rails) laid on the elevated sides on both sides, and the lifting trolley runs horizontally along the rails (car slide rails) laid on the bridge frame, forming a Rectangular working area. With the prolongation of the service time and the increase of the hoisting load, the track of the crane will be slightly deformed during operation. After a period of outage, this slight deformation will recover; but if the maximum deformation allowed is exceeded, the crane must Stop to overhaul the track or main girder, but the existing crane lacks effective track deformation detection equipment, some of the existing detection equipment is inaccurate, the error is large, not intelligent enough, and cannot be reminded in time. [0003] During ...

AI Technical Summary

Problems solved by technology

With the prolongation of the service time and the increase of the hoisting load, the track of the crane will be slightly deformed during operation. After a period of outage, this slight deformation will recover; but if the maximum deformation allowed is exceeded, the crane must Stop to overhaul the track or main beam, but the existing crane lacks effective track deformation detection equipment, some existing detection equipment is inaccurate, the error is large, not intelligent enough, and cannot be reminded in time

[0003] During the operation of the crane, the beam will also be slightly deformed. Although under no-load conditions, the beam itself will deform within a certain allowable range (upward arching), but after the load is too heavy, this deformation will exceed the maximum deformation range (downward arch), which seriously affects the safety and the service life of the crane; the existing crane lacks the functions of real-time knowledge of the bearing weight, real-time acquisition of beam deformation and overload warning, etc.

[0004] In addition, the actual lifting height of existing cranes is usually known based on experience. Because the crane has a lifting limit, once the lifting height exceeds the lifting limit, it is very easy to cause danger.

The existing crane lacks the early warning function of the lifting limit; in addition, there will be a braking delay when the crane is braked (the drive motor driving the lifting rope / wire rope up and down, the crane's cart or trolley moving and braking). When the delay is too large, the crane needs to be repaired, and there is a lack of such detection and early warning equipment in the prior art

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