Height control method, device and system for hoisting hook of tower crane and tower crane

Abstract

The invention discloses a height control method of a tower crane lifting suspension hook, an apparatus and a system thereof, and a tower crane to improve the height determination accuracy of the lifting suspension hook in order to improve the height spacing accuracy of the lifting suspension hook and improve the lifting work safety of the tower crane. The control method comprises the following steps: acquiring the weight of a suspended load, the operation position of a radius changing dolly and the detected height of the lifting suspension hook; obtaining the sagging rope length of a lifting steel wire rope between a steel wire rope starting bearer point and a steel wire rope end bearer point on a lifting jib according to the weight of suspended load and the operation position of the radius changing dolly; and obtaining a real height of the lifting suspension hook according to the sagging rope length of the lifting steel wire rope, the detected height of the lifting suspension hook and a corresponding relation between each of the sagging rope length of the lifting steel wire rope and the detected height of the lifting suspension hook and the real height of the lifting suspension hook.

Description

technical field [0001] The invention relates to the technical field of hoisting machinery, in particular to a method, device and system for controlling the height of a hoisting hook of a tower crane and a tower crane. Background technique [0002] Tower crane, that is, tower crane, also known as tower crane, is a kind of lifting equipment used in building construction. The slewing mechanism, luffing mechanism and hoisting mechanism are called the three major working mechanisms of the tower crane. Such as Figure 1a As shown, the hoisting mechanism of the tower crane mainly includes a hoisting drive motor (not shown in the figure), a hoisting drum 12, a hoisting wire rope 11, a rope winding pulley block 13, a luffing trolley 14, and a hoisting hook 15, etc. . [0003] At present, in the hoisting control system of the tower crane, the height limiter (the height limiter can output a current analog signal and a mechanical switch limit signal) is mainly used to detect and limit...

AI Technical Summary

Problems solved by technology

[0004] The inventor of the present application found that the height control method of the existing hoisting hook did not take into account the vertical phenomenon of the hoisting wire rope, which led to a large error in the height detection of the hoisting hook, which in turn led to the failure of the hoisting hook. The height limit is not accurate enough. In severe cases, it is very likely that the lifting hook will rush to the top or fall off, the lifting wire rope will break, the luffing trolley will be damaged, and the lifting jib frame will be seriously deformed. These accidents will cause major property losses and even casualties.

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