Amplitude variation and rotation linkage anti-swing system and method for tower crane

Abstract

The invention relates to an amplitude variation and rotation linkage anti-swing system and method for a tower crane. After an anti-swing function is initialized and activated, a lifting motor, an encoder, a lifting frequency converter, an amplitude variation motor, an amplitude variation frequency converter, a rotation motor, a rotation frequency converter and a programmable controller are matched to obtain the current height of a hoisted heavy object of the crane; after an operation handle gives amplitude variation and rotation speed signals, the programmable controller calculates and obtains speed curves of the amplitude variation motor and the rotation motor which enable the heavy object not to swing in operation according to a simple pendulum period principle in combination with the current heavy object height and a received speed signal instruction, and the amplitude variation frequency converter and the rotation frequency converter drive the amplitude variation motor and the rotation motor according to the received speed curves to control stable start and stop of the hoisted heavy object and reduce the swing amplitude of the heavy object. The system is reliable in performance, and solves the problem that safety accidents are easily caused due to the fact that the heavy object swings greatly in the air due to unskilled operation of a driver and needs to be held stably by personnel.

Description

technical field [0001] The present invention relates to a crane, which is mainly composed of a steel structure, a driving mechanism, and a control system, and is installed to move or swing in a vertical or horizontal plane, or perform both movements together, such as cantilever cranes, mast cranes, and tower cranes. The technical field particularly relates to a luffing and slewing linkage anti-sway system and an anti-sway method of a tower crane. Background technique [0002] Tower crane is the most commonly used lifting equipment on construction sites, also known as "tower crane". less equipment. [0003] In hoisting, because the hanging rope itself is flexible and there is an external force, the tower crane is prone to shaking. At present, most tower cranes are hoisted due to the unskilled operation of the driver and the lack of awareness of the tower crane. I don’t understand the performance, it is not uncommon for heavy objects to swing in the air, with a swing range o...

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Problems solved by technology

[0003] In hoisting, because the hanging rope itself is flexible and there is an external force, the tower crane is prone to shaking. At present, most tower cranes are hoisted due to the unskilled operation of the driver and the lack of awareness of the tower crane. I don’t understand the performance, it is not uncommon for heavy objects to swing in the air, with a swing range of up to 5-6 meters; when unloading, because the swing is too large, it is necessary for personnel to hold the heavy object to make it stop quickly , there is a risk of collision with heavy objects and buildings, and serious casualties; overall, the tower cranes of the prior art cannot guarantee the safety of the hoisting process, and also increase the time for alignment with objects , reducing the efficiency of hoisting

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