Full-automatic intelligent downward warping preventing device for lifting rope of tower crane

Abstract

The invention discloses a full-automatic intelligent downward warping preventing device for a lifting rope of a tower crane. A support 1 of the device is connected with a cargo boom 7 through a flange, a motor 2 is installed on the support 1, one end of an L-shaped swing rod 3 is connected with an output shaft of the motor 2, and the other end of the L-shaped swing rod 3 is provided with a rope supporting wheel 4. A first limiting switch 5 is installed on the cargo boom 7 and is located on the left side of a downward warping preventing device. A second limiting switch 6 is installed on the cargo boom 7 and is located on the right side of the downward warping preventing device. An electric control system is integrated in a PLC of the tower crane. According to the full-automatic intelligent downward warping preventing device, downward warping of the lifting steel wire rope is effectively controlled, and normal safety work of the tower crane is ensured; the motor is adopted for driving, automatic closed-loop control is adopted, after the limiting switches are triggered, the downward warping preventing device is driven through the motor and is automatically started and shut down, and a walking trolley passes through smoothly; and the full-automatic intelligent downward warping preventing device has the beneficial effects of being low in manufacturing cost, low in failure rate, compact in structure, convenient to install and maintain, good in use effect and the like and has very good popularization prospects.

Description

technical field [0001] The invention relates to the field of construction machinery, and is a device installed in the middle of a boom frame of a large-length boom of a tower crane to prevent excessive downward deflection of a hoisting rope. Background technique [0002] Because of the large and super large tower cranes, the working range of the boom is greater than 60m, and the lifting capacity is large, so the diameter of the hoisting wire rope is also relatively thick, and the self-weight is correspondingly large, resulting in the boom of the tower crane. The hoisting wire rope is greatly deflected. Especially when the tower crane is unloaded, due to the excessive downward deflection of the wire rope under the boom, the deflected wire rope can easily interfere with buildings or scaffolding within the working range of the tower crane, resulting in safety accidents. [0003] The existing anti-deflection devices for hoisting ropes of tower cranes all adopt the mechanical im...

AI Technical Summary

Problems solved by technology

[0002] Because of the large and super large tower cranes, the working range of the boom is greater than 60m, and the lifting capacity is large, so the diameter of the hoisting wire rope is also relatively thick, and the self-weight is correspondingly large, resulting in the boom of the tower crane. The hoisting wire rope is greatly deflected

Especially when the tower crane is unloaded, due to the excessive downward deflection of the wire rope under the boom, the deflected wire rope can easily interfere with buildings or scaffolding within the working range of the tower crane, resulting in safety accidents

[0003] The existing anti-deflection devices for hoisting ropes of tower cranes all adopt the mechanical impact type. During use, they are opened and closed by the impact of a trolley, which has a high failure rate and is easily damaged.

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