Method and crane for controlling hook height in crane luffing process

Abstract

The invention discloses a method for controlling the hook height in a luffing process of a crane and the crane. The method comprises the following steps that the length of a boom, the distance from aboom hinging point to a winding drum stand column and the height of the winding drum stand column are obtained, the included angle between the boom before luffing of the crane and the horizontal planeas a first angle, and the included angle between the boom after luffing of the crane and the horizontal plane as a second angle are combined, the length adjustment value of a hook steel wire rope inthe luffing process is calculated. In according to the length adjustment value, length changes of the hook steel wire rope in the luffing process of the boom can be corrected, so that the distance between the hook and the vertex of the boom does not change before and after luffing of the boom. The crane is provided with a hook height control unit, the length adjustment value used for adjusting thelength of the hook steel wire rope is finally calculated by a calculation module through data calculation among all modules, the length adjustment value is transmitted to a hook steel wire rope winding drum through an output module so as to control the length of the hook in the luffing process of the crane.

Description

technical field [0001] The invention relates to a method for controlling the height of a hook during the luffing process of a crane and the crane. Background technique [0002] Crane is a large single-arm structure lifting equipment. Such as figure 1 and figure 2 As shown, the crane 1 includes: a hook wire rope drum 11, a luffing wire rope drum 12, a jib 13, a drum column 14, a bottom frame 16 and a hook 15, wherein the hook wire rope drum 11 passes through the pair of hooks The driving of the wire rope 111 makes it pass through the apex 131 of the jib and move up and down with the hook 15 to realize the lifting of the load (not shown) hanging on the hook 15 . And the jib 13 is hinged on the bottom frame 16 through the jib hinge point 132. The jib 13 is driven by the luffing wire rope reel 12, with the jib hinge point 132 as the axis, as the length of the luffing wire rope 121 changes, And change your angle. [0003] Since the hook wire rope 111 does not coincide with ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome that in the prior art, the distance between the hook and the head of the jib will change due to the change of the angle of the jib, so that the operator cannot Simply estimate the height of the hook relative to the ground, and, in the case of excessive luffing, it will also cause the hook to rush to the top and cause safety accidents, and provide a method for controlling the height of the hook during the luffing process of the crane and crane

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