Stable lifting system of tower crane

Abstract

The invention relates to a stable lifting system of a tower crane. The stable lifting system of the tower crane is matched with the tower crane, and is characterized in that one or more sensors are used for acquiring real-time state signals of the tower crane, an information acquisition unit is used for acquiring working state signals of the tower crane, and a driving unit is used for driving the tower crane to lift; a controller is matched with the sensors and the information acquisition unit to obtain the real-time state signals and the working state signals and output the signals to the driving unit. The stable lifting system of the tower crane is simple, practical and reliable in performance, can automatically decelerate until a steel wire rope is tensioned and then leaves the ground when the tower crane rapidly lifts a heavy object, is high in real-time performance due to the fact that the working state and the torque of a lifting motor are collected through a frequency converter, can rapidly control the lifting motor to start and stop through logic analysis and judgment of a programmable controller and is not prone to false triggering, and the potential safety hazard of the tower crane in the lifting stage is reduced.

Description

technical field [0001] The invention relates to cranes; the technical field of load-hanging components or devices used for cranes, winches, winches or pulleys, in particular to a stable lifting system for tower cranes. Background technique [0002] Tower cranes, also known as tower cranes, are the most commonly used lifting equipment on construction sites. They are lifted step by step with standard sections, and are used to lift construction materials such as steel bars, corrugated wood, concrete, and steel pipes. Tower crane is an indispensable equipment on the construction site. [0003] According to the electromagnetic torque slip characteristic curve, if the speed changes suddenly, it will bring about a sudden change in the motor torque. In the use of tower cranes, heavy objects should not be lifted directly at high speed before they leave the ground to avoid sudden changes in the torque of the hoisting mechanism. It brings a large impact, which may cause severe shaking...

AI Technical Summary

Problems solved by technology

[0003] According to the electromagnetic torque slip characteristic curve, if the speed changes suddenly, it will bring about a sudden change in the motor torque. In the use of tower cranes, heavy objects should not be lifted directly at high speed before they leave the ground to avoid sudden changes in the torque of the hoisting mechanism. It brings a large impact, which may cause severe shaking of the boom and damage the structure, or cause serious safety accidents. It is extremely difficult to grasp the timing of increasing the lifting speed, and there are potential safety hazards. If the driver is inexperienced, it is easy to cause a series of operational problems

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