Crane hook anti-cable pull control method, control system and crane

Abstract

The invention relates to the field of engineering machinery and discloses a crane hook inclined pull prevention control method, a control system and a crane. The crane hook inclined pull prevention control method comprises the following steps: S1, detecting a winch hoisting request of a crane by a control unit; S2, after the control unit receives the winch hoisting request, detecting an off angleof a connecting line between a hook and a crane jib head and a vertical direction by using an angle detection device on the crane; S3, when the detected off angle exceeds a preset angle error range, entering into a centering procedure, wherein the centering procedure at least comprises a step that according to the off angle, the rotation speed of a rotary motor is controlled by the control unit bycontrolling a rotary control valve, and a crane jib is rotated to a centering position. By adopting the crane hook inclined pull prevention control method, the centering rotation speed of the crane jib can be controlled according to the off angle between the connecting line between the hook and the crane jib head and the vertical direction, therefore, the controllability of the crane in rotationcentering is improved.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a method for controlling anti-cable pull of a crane hook. Correspondingly, the present invention also relates to a crane hook anti-cable pull control system and a crane. Background technique [0002] With the continuous development of crane technology, higher and higher requirements are put forward for the lifting capacity of the crane. Correspondingly, the length of the boom of the crane is also increased to adapt to the size of the heavy object being lifted. In a crane with a long boom, the horizontal distance between the boom turntable on which the boom is installed and the boom head on which the hook is installed is relatively long, and it is difficult for the operator to judge whether the hook and the boom head are in the same position. In the vertical plane, when there is an angle between the tensioning direction of the wire rope and the vertical direction, there is a...

AI Technical Summary

Problems solved by technology

[0007] (3) The cooperation of the free-slewing solenoid valve and the brake solenoid valve can control the swing motor to enter or exit the floating state, but this control is actually equivalent to a switch, which cannot control the rotation angle of the boom, and the controllability of the adjustment process is poor

[0008] In summary, the process of adjusting the centering of the boom in the prior art has a relatively large potential safety hazard

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